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Back Interfacing with MQ-3 Alcohol Sensor Module MQ-3 gas sensor has high sensitivity to alcohol, and has good resistance to disturbances of gasoline, smoke and vapor. The sensor could be used to detect alcohol with different concentration; it is with low cost and suitable for different application. Sensitive material of MQ-3 gas sensor is SnO2, which with lower conductivity in clean air. When the target alcohol gas exists, sensor’s conductivity is proportional to the gas concentration. Description: 1. Model No: MQ-3. 2. Heater voltage: 5±0.2V. 3. Loop voltage: ≤24V (DC) 4. Load resistance: Adjustable. 5. Heating Resistance: 31Ω±3Ω (Room temperature). 6. Heating Power: ≤ 900mW. 7. Surface thermal resistance: 2Kohm-20Kohm (0.4mg/L alcohol). 8. Sensitivity: Rs (in air)/Rs (0.4mg/L alcohol) ≥ 5. Application Example with Arduino Uno: Connect the MQ-3 alcohol sensor module to Arduino Uno board as shown below: Programming Code /* MQ-3 Alcohol Sensor Circuit with Arduino */ const int AOUTpin=A0; //the AOUT pin of the alcohol sensor goes into analog pin A0 of the arduino const int DOUTpin=8; //the DOUT pin of the alcohol sensor goes into digital pin D8 of the arduino const int ledPin=13; //the anode of the LED connects to digital pin D13 of the arduino int limit; int value; void setup() { Serial.begin(115200); pinMode(DOUTpin, INPUT); pinMode(ledPin, OUTPUT); } void loop() { value= analogRead(AOUTpin); //reads the analaog value from the alcohol sensor's AOUT pin limit= digitalRead(DOUTpin); //reads the digital value from the alcohol sensor's DOUT pin Serial.print(" Alcohol value: "); Serial.println(value); //prints the alcohol value Serial.print("Limit: "); Serial.print(limit); //prints the limit reached as either LOW or HIGH (above or underneath) delay(100); if (limit == HIGH) { digitalWrite(ledPin, HIGH);//if limit has been reached, LED turns on as status indicator } else{ digitalWrite(ledPin, LOW); //if threshold not reached, LED remains off } } Result: Open up the Serial Monitor with Baud rate of 115200, the alcohol level detected will be shown as analog value. The alcohol limit value can be set with sensitivity potentiometer: if the alcohol level detected is below the set limit, the D0 green indicator will be off. If detected alcohol level is beyond the set limit, the DO LED will light up. Reference URL GET IN TOUCH We'd love to hear from you Contact Us

Back Interfacing of 28BYJ Stepper Driver with Arduino. What is so special about steppers? A stepper motor can move in accurate, fixed angle increments known as steps. For practical purposes, a stepper motor is a bit like a servo: you can tell it to move to a pre-defined position and can count on getting fairly consistent results with multiple repetitions. Servos though, are usually limited to a 0-180 degree range, while a stepper motor can rotate continuously, similar to a regular DC motor. The advantage of steppers over DC motors is that you can achieve much higher precision and control over the movement. The downside of using steppers is that they are a bit more complex to control than servos and DC motors . The 28BYJ-48 Stepper Motor Datasheet The 28BYJ-48 is a small, cheap, 5 volt geared stepping motors. These stepping motors are apparently widely used to control things like automated blinds, A/C units and are mass produced. Due to the gear reduction ratio of *approximately* 64:1 it offers decent torque for its size at speeds of about 15 rotations per minute (RPM). With some software “trickery” to accelerate gradually and a higher voltage power source (I tested them with 12 volts DC) I was able to get about 25+ RPM. These little steppers can be purchased together with a small breakout board for the Arduino compatible ULN2003 stepper motor driver for less than $5. Quite a bargain, compared to the price of a geared DC motor, a DC motor controller and a wheel encoder! The low cost and small size makes the 28BYJ-48 an ideal option for small robotic applications, and an excellent introduction to stepper motor control with Arduino. Here are the detailed specs of the 28BYJ-48 stepper motor. Motor Type Unipolar stepper motor Connection Type 5 Wire Connection (to the motor controller) Voltage 5-12 Volts DC Frequency 100 Hz Step mode Half-step mode recommended(8 step control signal sequence) Half-step mode: 8 step control signal sequence (recommended) 5.625 degrees per step / 64 steps per one revolution of the internal motor shaft Full Step mode: 4 step control signal Step angle sequence 11.25 degrees per step / 32 steps per one revolution of the internal motor shaft Manufacturer specifies 64:1 . Some patient and diligent people on the Arduino forums have disassembled the gear train of these little motors and determined that the exact gear ratio is in fact 63.68395:1 . My observations confirm their findings. These means that in the recommended half-step mode we will have:64 steps per motor rotation x 63.684 gear ratio = Gear ratio 4076 steps per full revolution (approximately). Wiring to the ULN2003 controller A (Blue), B (Pink), C (Yellow), D (Orange), E (Red, Mid- Point) Weight 30g Material Required: Material Quantity Arduino Uno 1 Stepper Driver 1 Jumper cables 6 Stepper Motor 1 Pinout Diagram: The motor has 4 coils of wire that are powered in a sequence to make the magnetic motor shaft spin. When using the full-step method, 2 of the 4 coils are powered at each step. The default stepper library that comes pre-installed with the Arduino IDE uses this method. The 28BYH-48 datasheet specifies that the preferred method for driving this stepper is using the half-step method, where we first power coil 1 only, then coil 1 and 2 together, then coil 2 only and so on…With 4 coils, this means 8 different signals, like in the table below. Circuit Diagram: Wiring the ULN2003 stepper motor driver to Arduino Uno : The ULN2003 stepper motor driver board allows you to easily control the 28BYJ-48 stepper motor from a microcontroller, like the Arduino Uno. One side of the board side has a 5 wire socket where the cable from the stepper motor hooks up and 4 LEDs to indicate which coil is currently powered. The motor cable only goes in one way, which always helps. On the side you have a motor on / off jumper (keep it on to enable power to the stepper). The two pins below the 4 resistors, is where you provide power to the stepper. Note that powering the stepper from the 5 V rail of the Arduino is not recommended. A separate 5-12 V 1 Amp power supply or battery pack should be used, as the motor may drain more current than the microcontroller can handle and could potentially damage it. In the middle of the board we have the ULN2003 chip. At the bottom are the 4 control inputs that should be connected to four Arduino digital pins . Hooking it up to the Arduino Connect the ULN2003 driver IN1, IN2, IN3 and IN4 to digital pin 3, 4, 5 and 6 respectively on the Arduino Uno. Connect the positive lead from a decent 5-12V battery pack to the “+” pin of the ULN2003 driver and the ground to the “-” pin. Make sure that the “on/off” jumper next to the “-” pin is on. If you power the Arduino from a different battery pack, connect the grounds together. Arduino stepper code and the AccelStepper library The default stepper library that comes pre-installed with the Arduino IDE supports the full-step method only and has limited features. It does not run the 28BYJ-48 motors very efficiently and getting two of them running at the same time for a differential drive robot is a bit more difficult. I came across example sketch by 4tronix that used the half-step method with no additional libraries. Their code worked well and I was able to modify it, so that I can run two steppers at the same time. Still, I was only able to get my stepper motor spinning fairly slow and it was getting quite warm, for some reason. Additionally, that sample code uses delays for the steps and that will cause some issues when we start adding more complex functions in the loop and hook up various sensors. Then I came across the AccelStepper library. It runs the 28BYJ-48 steppers very efficiently (they never go as hot as with the other options I tried) and also supports acceleration (which allows the stepper to get to a higher speed). The library uses non blocking code for the steps and has quite a few other nice features. After some messing around with the documentation and the examples I got everything up and running. Below is the code that will slowly accelerate the 28BYJ-48 in one direction, then decelerate to a stop and accelerate in the opposite direction. Naturally, make sure you download and install the AccelStepper library first! #include #define HALFSTEP 8 // Motor pin definitions #define motorPin1 3 // IN1 on the ULN2003 driver 1 #define motorPin2 4 // IN2 on the ULN2003 driver 1 #define motorPin3 5 // IN3 on the ULN2003 driver 1 #define motorPin4 6 // IN4 on the ULN2003 driver 1 // Initialize with pin sequence IN1-IN3-IN2-IN4 for using the AccelStepper with 28BYJ-48 AccelStepper stepper1 ( HALFSTEP , motorPin1 , motorPin3 , motorPin2 , motorPin4 ); void setup () { stepper1 . setMaxSpeed ( 1000.0 ); stepper1 . setAcceleration ( 100.0 ); stepper1 . setSpeed ( 200 ); stepper1 . moveTo ( 20000 ); } //--(end setup )--- void loop () { //Change direction when the stepper reaches the target position if ( stepper1 . distanceToGo () == 0 ) { stepper1 . moveTo (- stepper1 . currentPosition ()); } stepper1 . run (); } The code above will not push this motor to its limit. You can experiment with the acceleration and speed settings to see what is the best you can squeeze out. Note that for nigher speeds, you will likely need a higher voltage DC source. If you got your stepper running, here is the code that the StepperBot from the video above is running. You will need to adjust the speed, as well variables based on your base and wheel sizes, if you want to have your bot moving in a square path. #include #define HALFSTEP 8 // motor pins #define motorPin1 3 // IN1 on the ULN2003 driver 1 #define motorPin2 4 // IN2 on the ULN2003 driver 1 #define motorPin3 5 // IN3 on the ULN2003 driver 1 #define motorPin4 6 // IN4 on the ULN2003 driver 1 #define motorPin5 8 // IN1 on the ULN2003 driver 2 #define motorPin6 9 // IN2 on the ULN2003 driver 2 #define motorPin7 10 // IN3 on the ULN2003 driver 2 #define motorPin8 11 // IN4 on the ULN2003 driver 2 // Initialize with pin sequence IN1-IN3-IN2-IN4 for using the AccelStepper with 28BYJ-48 AccelStepper stepper1 ( HALFSTEP , motorPin1 , motorPin3 , motorPin2 , motorPin4 ); AccelStepper stepper2 ( HALFSTEP , motorPin5 , motorPin7 , motorPin6 , motorPin8 ); // variables int turnSteps = 2100 ; // number of steps for a 90 degree turn int lineSteps = - 6600 ; //number of steps to drive straight int stepperSpeed = 1000 ; //speed of the stepper (steps per second) int steps1 = 0 ; // keep track of the step count for motor 1 int steps2 = 0 ; // keep track of the step count for motor 2 boolean turn1 = false ; //keep track if we are turning or going straight next boolean turn2 = false ; //keep track if we are turning or going straight next void setup () { delay ( 3000 ); //sime time to put the robot down after swithing it on stepper1 . setMaxSpeed ( 2000.0 ); stepper1 . move ( 1 ); // I found this necessary stepper1 . setSpeed ( stepperSpeed ); stepper2 . setMaxSpeed ( 2000.0 ); stepper2 . move (- 1 ); // I found this necessary stepper2 . setSpeed ( stepperSpeed ); } void loop () { if ( steps1 == 0 ) { int target = 0 ; if ( turn1 == true ) { target = turnSteps ; } else { target = lineSteps ; } stepper1 . move ( target ); stepper1 . setSpeed ( stepperSpeed ); turn1 = ! turn1 ; } if ( steps2 == 0 ) { int target = 0 ; if ( turn2 == true ) { target = turnSteps ; } else { target = - lineSteps ; } stepper2 . move ( target ); stepper2 . setSpeed ( stepperSpeed ); turn2 = ! turn2 ; } steps1 = stepper1 . distanceToGo (); steps2 = stepper2 . distanceToGo (); stepper1 . runSpeedToPosition (); stepper2 . runSpeedToPosition (); } Tested Programming Code: #define IN1 3 #define IN2 4 #define IN3 5 #define IN4 6 int Steps = 4096; //4096 or 768 int cstep = 0; void setup() { Serial.begin(9600); pinMode(IN1, OUTPUT); pinMode(IN2, OUTPUT); pinMode(IN3, OUTPUT); pinMode(IN4, OUTPUT); } void loop() { for(int x=0;x

LAB Resources At TechKnowSkola, we are your reliable partner in education. As an abbreviation for our commitment, "We" stands for TechKnowSkola. We offer diverse lab resources aligned with your educational institution's lab setup, providing comprehensive support. From curriculums and teaching materials to activity sheets and beyond, we ensure all lab-related resources are included in our service support model. With us, you can rest assured that you'll have everything you need to create a dynamic and engaging learning environment for your students. Together, let's unlock the potential of tomorrow's innovators! Curriculums Activity Sheets Training Materials Guidelines by AIM Teaching Materials Project Guides Safety Guidelines ​ Reference Books FREE Resources Techknowskola's Free resources have got you covered! Enjoy AIM's guidelines and curriculum, plus access to Activities and TKS developed projects. A treasure trove of innovation awaits you! Click Here Guidelines by AIM Activity & Project Sheet PFMS & GeM Curriculum Informative Videos Paid Resources Techknowskola's Paid resources, a treasure trove of materials designed for your Labs. Project Guides, Ebooks, Activity Sheets, Curriculum alinged with Textbook & NEP 2020 and a lot more to unlock endless learning possibilities! Click Here E-Book Teachers Resources Project Guide Video Library Curriculum

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Global Reach Programs At TechKnowSkola, we are on a mission to transform education and foster creativity, innovation, and problem-solving skills worldwide. Our Global Reach Program aims to spread the power of STEAM (Science, Technology, Engineering, Arts, and Mathematics) and AI & Robotics Labs to different geographic locations across the globe. Why Choose Our Global Reach Program Empowering Education Everywhere: We believe that quality education should be accessible to all. Through our program, we extend cutting-edge STEAM and AI & Robotics Labs to diverse communities worldwide. Cultivating Future Innovators: By setting up labs in various locations, we provide students with the opportunity to embrace emerging technologies, inspiring them to become the next generation of innovators and changemakers. Bridging the Skills Gap: Our labs equip students with essential 21st-century skills, including critical thinking, collaboration, and creativity, preparing them for success in the digital era. Cross-Cultural Collaboration: Our global presence encourages cross-cultural collaboration and learning, fostering a global perspective and understanding among students. Program Highlights: Customized Lab Setup: We tailor each lab to suit the unique needs and requirements of the location, ensuring an enriching and inclusive learning environment. Expert Training and Support: Our team of experienced educators and mentors provide comprehensive training and ongoing support to educators in the setup locations, ensuring smooth lab operations. Innovative Curricula: Our engaging and progressive curricula integrate real-world applications, making learning relevant and exciting for students of all ages. Technological Advancements: Our AI & Robotics Labs embrace cutting-edge technology, providing students with hands-on experience in AI, machine learning, and robotics. Global Network: Joining our Global Reach Program connects educational institutions with a worldwide network of like-minded educators and learners, fostering knowledge exchange and collaboration. Become a Partner in our Global Reach Program TechKnowSkola is actively seeking partners to expand our transformative program across the globe. Whether you represent an international region or a foreign educational institution, we welcome collaborations that share our passion for transforming education. Let's join forces to unleash the potential of STEAM and AI & Robotics Labs worldwide, empowering the next generation of innovators to shape a better world. Together, we can ignite greatness in every corner of the globe! Email Us: contact@techknowskola.c om

Meet Our #Guru's Let no man in the world live in delusion. Without a Guru none can cross over to the other shore. ~Shree Guru Nanak Dev दुनिया में किसी भी व्यक्ति को भ्रम में नहीं रहना चाहिए. बिना गुरु के कोई भी दुसरे किनारे तक नहीं जा सकता है. ~ श्री गुरु नानक देव Ajay Raja (Mentor) He is a Data & Analytics manager with the BCG New Delhi office. He has rich experience in applying AI/ML transformations, supply chain optimization, digital marketing optimization to drive operational excellence for Fortune 500 companies. ​ He has a Masters degree in Mathematics from BITS Pilani. Jaishiv Natarajan (Mentor) Philanthropy | Diversity & Entrepreneurship ​ Entrepreneur & Guest Speaker. He runs a UK based virus research and drug discovery(pharmaceutical) company. Some of the sectors he is associated with are Healthcare, IoT, Life Sciences, Medical Devices and Drug Discovery. ​ He has done Master's degree, Bioinformatics, from The University of Edinburgh, Scotland. Brijesh Kumar Sharma (Advisor) He is retired government lecturer (Government of Rajasthan) well known educationist & social worker (Department of Education, Rajasthan) & owner of St. Augustya Education Trust. ​ He is having rich experience of 40 years in education. Through these years he remain part of well known Dalmia Education Trust etc as Sr. Teacher. Advocate Raman Mudgil (Legal Advisor) He is senior advocate in Delhi Bar Chamber Association & Dwarka District Court Delhi. Dr. Sumit Sharma (Advisor) He is Senior Dental Surgeon member of Dental Association. He is social worker and advisor. MEET OUR TEAM “Great things in business are never done by one person; they’re done by a team of people.” – Steve Jobs Nitesh Yadav Managing Director (MD) Nitesh Yadav (She/her/hers) is an Edupreneur who has built many successful ventures in the Learning & Development space. Started her first TECHKNOWSKOLA Pvt. Ltd. while she was a sophomore at IIT Delhi. She built an assessment and training platform from scratch, which handles more than 400K candidates every year. Built state-of-the-art application that helps predict workforce proficiency and improve the learning quotient. We are improving learning efficiency, with help of AI predictive algorithms, CNNs, reinforcement learnings, real-time video processing, etc. Creating enterprise-level products in no time is her USP. Her technological expertise includes mobile/web product architecture, UI/UX, machine learning, big data optimization, and analytics. Mr. Govind Chief Technical Officer (CTO) Director of "PE PRE CA PVT. LTD. ​ He has completed his Post Graduation from Punjab Technical University. He has a vast experience of 12+ years working as a consultant on hardware development projects such as - Worked on MQTT smart server Designed PLC Circuit Designed IoT Powered Automation System Developed Jumbo Device to reduce inductive load. Designed PCB Board Designed Automatic Security System Developed Android Smart Application & Touchless Automatic Vending Machine Developed Home Automation (IoT BASED) Built the world's first golgappa and Vada pav smart vending machine. Mukesh Bala Chief Strategy Officer (CSO) Mukesh Bala(She/her/hers) prefers to call herself a parenting mentor. She has authored multiple parenting books on the importance of brain-based learning in children. For TechKnowSkola, She has contributed to developing the extensive activity kits and has ensured that each kit is progressive, age-appropriate, and skill-oriented. Parvesh Parashar Chief Learning Officer (CLO) Gaurav R & D Team Ashish Marketing Team Naresh Yadav Programming Editor Satish Kumar Designer Shrikant Operations Manager

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Back Motion Detection using PIR Sensor with Arduino What is a PIR sensor? PIR sensors allow you to sense motion. They are used to detect whether a human has moved in or out of the sensor’s range. They are commonly found in appliances and gadgets used at home or for businesses. They are often referred to as PIR, "Passive Infrared", "Pyroelectric", or "IR motion" sensors. Following are the advantages of PIR Sensors − · Small in size · Wide lens range · Easy to interface· · Inexpensive · Low-power · Easy to use · Do not wear out Material Required: Material Quantity Arduino Uno 1 PIR Motion Sensor 1 Jumper cables 3 Pinout Diagram: Circuit Diagram: Working: The module actually consists of a Pyroelectric sensor which generates energy when exposed to heat. That means when a human or animal body will get in the range of the sensor it will detect a movement because the human or animal body emits heat energy in a form of infrared radiation. That’s where the name of the sensor comes from, a Passive Infra-Red sensor. And the term “passive” means that sensor is not using any energy for detecting purposes, it just works by detecting the energy given off by the other objects. The module also consists a specially designed cover named Fresnel lens, which focuses the infrared signals onto the pyroelectric sensor. You can adjust the sensor sensitivity and delay time via two variable resistors located at the bottom of the sensor board. Tested Programming Code: /* * PIR sensor tester */ int ledPin = 13; // choose the pin for the LED int inputPin = 2; // choose the input pin (for PIR sensor) int pirState = LOW; // we start, assuming no motion detected int val= 0; // variable for reading the pin status void setup() { pinMode(ledPin, OUTPUT); // declare LED as output pinMode(inputPin, INPUT); // declare sensor as input Serial.begin(9600); } void loop(){ val = digitalRead(inputPin); // read input value if (val == HIGH) { // check if the input is HIGH digitalWrite(ledPin, HIGH); // turn LED ON if (pirState == LOW) { // we have just turned on Serial.println("Motion detected!"); // We only want to print on the output change, not state pirState = HIGH; } } else { digitalWrite(ledPin, LOW); // turn LED OFF if (pirState == HIGH) { // we have just turned of Serial.println("Motion ended!"); // We only want to print on the output change, not state pirState = LOW; } } } Precautions: 1. Double Check the connections before powering on the circuit. 2. Don’t use loose jumper cables. 3. Check Whether proper board is selected from Arduino IDE. 4. Ensure proper placement of sensor for correct working. 5. Don’t come in range of the sensor, else it will be always triggering ON. Conclusion: You can successfully check for Motion Detection using an IR sensor. Many more other applications can be made using PIR Motion sensor as it has many possibilities to work with. Output: Once the sensor detects any motion, Arduino will send a message via the serial port to say that a motion is detected. The PIR sense motion will delay for certain time to check if there is a new motion. If there is no motion detected, Arduino will send a new message saying that the motion has ended. Situation Screenshot: Serial Monitor (Ctrl+Shift+M) Reference URL GET IN TOUCH We'd love to hear from you Contact Us

Back Bluetooth Controlled Car Using Arduino Uno. Material Required: Material Quantity Arduino Uno 1 12V DC Motor /BO motor 2 Jumper cables 15 HC-05 Bluetooth Module 1 Breadboard 1 Breadboard 1 This tutorial will teach you how to create your own Bluetooth controlled car. So let’s get started. This will be a Bluetooth controlled car so for this project we will be using HC-05 Bluetooth module to receive the controlling data packets. We will also need an android app which will be sending the controlling data packets to the Bluetooth module. We will use a third party application ( https://play.google.com/store/apps/details?id=com.broxcode.arduinobluetoothfree&hl=en to download) for this purpose. Let's build the hardware (Body of the car) The car which we are building for this project will be a dual motor car. Two 12 v 200 rpm DC or BO motors. You can use a readymade chassis. Circuit Now let us build the circuit. CODE : Here we will use the direction of rotation of motors to control the direction of the car. Forward - Both motors move in forward direction. Backward - Both motors move in backward direction. Left - Left motor moves backwards and right motor moves forward. Right - Left motor moves forwards and right motor moves backward. Stop - Both motors stop Tested Programming Code: #include AF_DCMotor motor1(1); //motor1 is the left motor AF_DCMotor motor2(2); //motor2 is the right motor int val; void setup() { Serial.begin(9600); motor1.setSpeed(255); //motor speed is set motor2.setSpeed(255); Stop(); } void loop() { bt=Serial.read(); if(val=='1') //when the bluetooth module recieves 1 the car moves forward { forward(); } if(val=='2') //when the bluetooth module recieves 2 the car moves backward { backward(); } if(val=='3') //when the bluetooth module recieves 3 the car moves left { left(); } if(val=='4') //when the bluetooth module recieves 4 the car moves right { right(); } if(val=='5') //when the bluetooth module recieves 5 the car stops { Stop(); } } void forward() { motor1.run(FORWARD); motor2.run(FORWARD); } void backward() { motor1.run(BACKWARD); motor2.run(BACKWARD); } void left() { motor1.run(BACKWARD); motor2.run(FORWARD); } void right() { motor1.run(FORWARD); motor2.run(BACKWARD); } void Stop() { motor1.run(RELEASE); motor2.run(RELEASE); } Precautions: 1. Double check the connections before powering on the circuit. 2. Don’t use loose jumper cables. 3. Check whether proper board is selected from Arduino IDE. 4. Ensure proper placement of Bluetooth and Motor driver for correct working. 5. Don’t lose hope if it does not run properly for the first time, try again. Reference URL GET IN TOUCH We'd love to hear from you Contact Us

Join the TechKnowSkola Team Unlock Your Potential in STEAM Education! Are you passionate about shaping the future of education and inspiring the next generation of innovators? At TechKnowSkola, we are on a mission to revolutionize STEAM education and empower students with cutting-edge knowledge and skills. Join our dynamic team of educators, creators, and visionaries to make a meaningful impact in the world of education. Why Choose a Career at TechKnowSkola? 🚀 Transformative Education: Be part of a forward-thinking organization that believes in the power of STEAM education to drive positive change and innovation. 💡 Innovative Environment: Embrace a culture of innovation and continuous learning. Contribute to the development of progressive teaching methodologies and technologies. 🏆 Recognition and Growth: Be recognized for your contributions and dedication. Avail opportunities for professional growth and career advancement. 🌟 Inspire Future Innovators: Fuel young minds with creativity, curiosity, and problem-solving abilities. Shape the next generation of thinkers and doers. 📚 Holistic Development: Support the holistic development of students by fostering their social, emotional, and intellectual growth. 🌍 Global Impact: Collaborate with educators, schools, and organizations worldwide to expand access to quality education and drive positive change on a global scale. 🔍 Explore Exciting Opportunities! 🔎 Current Openings 🔬 STEAM Educator: Inspire students through engaging STEAM lessons and hands-on activities. Cultivate a love for learning and curiosity in young minds. 🎨 Robotics and AI Specialist: Lead our robotics and AI programs, guiding students in exploring the exciting world of automation and intelligent systems. 💻 Technology Integration Specialist: Harness the power of technology to enhance classroom learning and create innovative educational experiences. 🎓 Curriculum Developer: Craft dynamic and progressive curricula that align with educational standards and inspire creativity and critical thinking. 🌐 Marketing and Outreach: Drive the growth and visibility of TechKnowSkola through strategic marketing and outreach initiatives. ✨ Additional Openings: We are also hiring for Product Developers, PCB Designers, and Embedded Electronics Engineers. To join TechKnowSkola's inspiring team, kindly send your resume to Contact@techknowskola.com . Together, let's embark on a journey of innovation and transformation in STEAM education! 🚀🔬🎉 Connect with us on Linkedin

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Back 8×8 LED Matrix MAX7219 Tutorial with Scrolling Text & Android Control via Bluetooth Students now you know everything about how a matrix works, let’s move to some advanced part of it. 8×8 LED Matrix Scrolling Arduino Code Next let’s take a look at the scrolling text example and see what’s different. Below the code you will find its description. #include #include PROGMEM const unsigned char CH[] = { 3, 8, B00000000, B00000000, B00000000, B00000000, B00000000, // space 1, 8, B01011111, B00000000, B00000000, B00000000, B00000000, // ! 3, 8, B00000011, B00000000, B00000011, B00000000, B00000000, // " 5, 8, B00010100, B00111110, B00010100, B00111110, B00010100, // # 4, 8, B00100100, B01101010, B00101011, B00010010, B00000000, // $ 5, 8, B01100011, B00010011, B00001000, B01100100, B01100011, // % 5, 8, B00110110, B01001001, B01010110, B00100000, B01010000, // & 1, 8, B00000011, B00000000, B00000000, B00000000, B00000000, // ' 3, 8, B00011100, B00100010, B01000001, B00000000, B00000000, // ( 3, 8, B01000001, B00100010, B00011100, B00000000, B00000000, // ) 5, 8, B00101000, B00011000, B00001110, B00011000, B00101000, //* 5, 8, B00001000, B00001000, B00111110, B00001000, B00001000, // + 2, 8, B10110000, B01110000, B00000000, B00000000, B00000000, // , 4, 8, B00001000, B00001000, B00001000, B00001000, B00000000, // - 2, 8, B01100000, B01100000, B00000000, B00000000, B00000000, // . 4, 8, B01100000, B00011000, B00000110, B00000001, B00000000, // / 4, 8, B00111110, B01000001, B01000001, B00111110, B00000000, // 0 3, 8, B01000010, B01111111, B01000000, B00000000, B00000000, // 1 4, 8, B01100010, B01010001, B01001001, B01000110, B00000000, // 2 4, 8, B00100010, B01000001, B01001001, B00110110, B00000000, // 3 4, 8, B00011000, B00010100, B00010010, B01111111, B00000000, // 4 4, 8, B00100111, B01000101, B01000101, B00111001, B00000000, // 5 4, 8, B00111110, B01001001, B01001001, B00110000, B00000000, // 6 4, 8, B01100001, B00010001, B00001001, B00000111, B00000000, // 7 4, 8, B00110110, B01001001, B01001001, B00110110, B00000000, // 8 4, 8, B00000110, B01001001, B01001001, B00111110, B00000000, // 9 2, 8, B01010000, B00000000, B00000000, B00000000, B00000000, // : 2, 8, B10000000, B01010000, B00000000, B00000000, B00000000, // ; 3, 8, B00010000, B00101000, B01000100, B00000000, B00000000, // < 3, 8, B00010100, B00010100, B00010100, B00000000, B00000000, // = 3, 8, B01000100, B00101000, B00010000, B00000000, B00000000, // > 4, 8, B00000010, B01011001, B00001001, B00000110, B00000000, // ? 5, 8, B00111110, B01001001, B01010101, B01011101, B00001110, // @ 4, 8, B01111110, B00010001, B00010001, B01111110, B00000000, //A 4, 8, B01111111, B01001001, B01001001, B00110110, B00000000, // B 4, 8, B00111110, B01000001, B01000001, B00100010, B00000000, // C 4, 8, B01111111, B01000001, B01000001, B00111110, B00000000, // D 4, 8, B01111111, B01001001, B01001001, B01000001, B00000000, // E 4, 8, B01111111, B00001001, B00001001, B00000001, B00000000, // F 4, 8, B00111110, B01000001, B01001001, B01111010, B00000000, // G 4, 8, B01111111, B00001000, B00001000, B01111111, B00000000, // H 3, 8, B01000001, B01111111, B01000001, B00000000, B00000000, // I 4, 8, B00110000, B01000000, B01000001, B00111111, B00000000, // J 4, 8, B01111111, B00001000, B00010100, B01100011, B00000000, // K 4, 8, B01111111, B01000000, B01000000, B01000000, B00000000, // L 5, 8, B01111111, B00000010, B00001100, B00000010, B01111111, // M 5, 8, B01111111, B00000100, B00001000, B00010000, B01111111, // N 4, 8, B00111110, B01000001, B01000001, B00111110, B00000000, //O 4, 8, B01111111, B00001001, B00001001, B00000110, B00000000, // P 4, 8, B00111110, B01000001, B01000001, B10111110, B00000000, // Q 4, 8, B01111111, B00001001, B00001001, B01110110, B00000000, // R 4, 8, B01000110, B01001001, B01001001, B00110010, B00000000, // S 5, 8, B00000001, B00000001, B01111111, B00000001, B00000001, // T 4, 8, B00111111, B01000000, B01000000, B00111111, B00000000, // U 5, 8, B00001111, B00110000, B01000000, B00110000, B00001111, // V 5, 8, B00111111, B01000000, B00111000, B01000000, B00111111, // W 5, 8, B01100011, B00010100, B00001000, B00010100, B01100011, // X 5, 8, B00000111, B00001000, B01110000, B00001000, B00000111, // Y 4, 8, B01100001, B01010001, B01001001, B01000111, B00000000, // Z 2, 8, B01111111, B01000001, B00000000, B00000000, B00000000, // [ 4, 8, B00000001, B00000110, B00011000, B01100000, B00000000, // \ backslash 2, 8, B01000001, B01111111, B00000000, B00000000, B00000000, // ] 3, 8, B00000010, B00000001, B00000010, B00000000, B00000000, // hat 4, 8, B01000000, B01000000, B01000000, B01000000, B00000000, // _ 2, 8, B00000001, B00000010, B00000000, B00000000, B00000000, // ` 4, 8, B00100000, B01010100, B01010100, B01111000, B00000000, // a 4, 8, B01111111, B01000100, B01000100, B00111000, B00000000, // b 4, 8, B00111000, B01000100, B01000100, B00101000, B00000000, // c 4, 8, B00111000, B01000100, B01000100, B01111111, B00000000, // d 4, 8, B00111000, B01010100, B01010100, B00011000, B00000000, // e 3, 8, B00000100, B01111110, B00000101, B00000000, B00000000, // f 4, 8, B10011000, B10100100, B10100100, B01111000, B00000000, // g 4, 8, B01111111, B00000100, B00000100, B01111000, B00000000, //h 3, 8, B01000100, B01111101, B01000000, B00000000, B00000000, // i 4, 8, B01000000, B10000000, B10000100, B01111101, B00000000, // j 4, 8, B01111111, B00010000, B00101000, B01000100, B00000000, // k 3, 8, B01000001, B01111111, B01000000, B00000000, B00000000, // l 5, 8, B01111100, B00000100, B01111100, B00000100, B01111000, // m 4, 8, B01111100, B00000100, B00000100, B01111000, B00000000, // n 4, 8, B00111000, B01000100, B01000100, B00111000, B00000000, // o 4, 8, B11111100, B00100100, B00100100, B00011000, B00000000, // p 4, 8, B00011000, B00100100, B00100100, B11111100, B00000000, // q 4, 8, B01111100, B00001000, B00000100, B00000100, B00000000, // r 4, 8, B01001000, B01010100, B01010100, B00100100, B00000000, // s 3, 8, B00000100, B00111111, B01000100, B00000000, B00000000, // t 4, 8, B00111100, B01000000, B01000000, B01111100, B00000000, // u 5, 8, B00011100, B00100000, B01000000, B00100000, B00011100, //v 5, 8, B00111100, B01000000, B00111100, B01000000, B00111100, // w 5, 8, B01000100, B00101000, B00010000, B00101000, B01000100, // x 4, 8, B10011100, B10100000, B10100000, B01111100, B00000000, // y 3, 8, B01100100, B01010100, B01001100, B00000000, B00000000, // z 3, 8, B00001000, B00110110, B01000001, B00000000, B00000000, // { 1, 8, B01111111, B00000000, B00000000, B00000000, B00000000, // | 3, 8, B01000001, B00110110, B00001000, B00000000, B00000000, // } 4, 8, B00001000, B00000100, B00001000, B00000100, B00000000, // ~ }; int DIN = 7; // DIN pin of MAX7219 module int CLK = 6; // CLK pin of MAX7219 module int CS = 5; // CS pin of MAX7219 module int maxInUse = 2; MaxMatrix m(DIN, CS, CLK, maxInUse); byte buffer[10]; char text[]= "TechKnowSkola"; // Scrolling text void setup() { m.init(); // module initialize m.setIntensity(15); // dot matix intensity 0-15 } void loop() { printStringWithShift(text, 100); // (text, scrolling speed) } // Display=the extracted characters with scrolling void printCharWithShift(char c, int shift_speed) { if (c < 32) return; c -= 32; memcpy_P(buffer, CH + 7 * c, 7); m.writeSprite(32, 0, buffer); m.setColumn(32 + buffer[0], 0); for (int i = 0; i < buffer[0] + 1; i++) { delay(shift_speed); m.shiftLeft(false, false); } } // Extract the characters from the text string void printStringWithShift(char* s, int shift_speed) { while (*s != 0) { printCharWithShift(*s, shift_speed); s++; } } Now let’s move to the functioning of Bluetooth HC-05 Description: Here we have to include an additional library for the PROGMEN which is variable modifier and it’s used for storing data in the flash memory instead of SRAM. When we have a larger database of variables which are static, like in this case defining letters and characters, it’s better to store them in the flash memory because it’s much bigger, 32K bytes, compared to the 2K bytes of the SRAM. Next with a character array we define the scrolling text and in the loop section the custom function printStringWithShift, prints the scrolling text on the LED matrix with a scrolling speed defined in milliseconds with the second argument. The first thing that this custom function do is that it extracts the characters from the text string and then display these scrolling characters on the led matrix. The particular module that I have can be powered from 3.6 to 6 volts, because it comes on breakout board which contains a voltage regulator. However, the logic voltage level of the data pins is 3.3V. So, the line between the Arduino TX (Transmit Pin, which has 5V output) and the Bluetooth module RX (Receive Pin, which supports only 3.3V) needs to be connected through a voltage divider in order not to burn the module. On the other hand, the line between the Bluetooth module TX pin and the Arduino RX pin can be connected directly because the 3.3V signal from the Bluetooth module is enough to beaccepted as a high logic at the Arduino Board. Circuit Schematics: Here’s how we need to connect the module to the Arduino Board. Connecting the Smartphone to the HC-05 Bluetooth Module and the Arduino Now we are ready to connect the smartphone to the Bluetooth module and the Arduino. What we need to do here is to activate the Bluetooth and the smartphone will find the HC-05 Bluetooth module. Then we need to pair the devices and the default password of the HC-05 module is 1234. After we have paired the devices we need an application for controlling the Arduino. There are many application in the Play Store for this purpose which will work with the Arduino code that we wrote. However, I made my own custom application for this tutorial using the MIT App Inventor online application. This is a great and easy to use application for building Android application and in my next tutorial you can find a detailed step by step guide how to build your own custom Android application for your Arduino Project. Android App for Controlling 8×8 LED Matrix via Bluetooth Once we learned how the MAX7219 works, now we can make the third example which is a practical Arduino project where we will build a custom Android app to control the LED matrix via Bluetooth communication. Before we continue I would suggest you to check detailed tutorials on how to use the HC-05 Bluetooth module and how to build a custom Android app using the MIT App Inventor online application . Here’s the Arduino code and now let’s see the modifications compared to the previous example. /* 8x8 LED Matrix MAX7219 Scrolling Text Android Control via Bluetooth by Dejan Nedelkovsk i, www.HowToMechatronics.com Based on the following library: GitHub | riyas-org/max7219 https://github.com/riyas-org/max7219 */ #include #include #include PROGMEM const unsigned char CH[] = { 3, 8, B00000000, B00000000, B00000000, B00000000, B00000000, // space 1, 8, B01011111, B00000000, B00000000, B00000000, B00000000, // ! 3, 8, B00000011, B00000000, B00000011, B00000000, B00000000, // " 5, 8, B00010100, B00111110, B00010100, B00111110, B00010100, //# 4, 8, B00100100, B01101010, B00101011, B00010010, B00000000, // $ 5, 8, B01100011, B00010011, B00001000, B01100100, B01100011, // % 5, 8, B00110110, B01001001, B01010110, B00100000, B01010000, // & 1, 8, B00000011, B00000000, B00000000, B00000000, B00000000, // ' 3, 8, B00011100, B00100010, B01000001, B00000000, B00000000, // ( 3, 8, B01000001, B00100010, B00011100, B00000000, B00000000, // ) 5, 8, B00101000, B00011000, B00001110, B00011000, B00101000, // * 5, 8, B00001000, B00001000, B00111110, B00001000, B00001000, // + 2, 8, B10110000, B01110000, B00000000, B00000000, B00000000, // , 4, 8, B00001000, B00001000, B00001000, B00001000, B00000000, //- 2, 8, B01100000, B01100000, B00000000, B00000000, B00000000, // . 4, 8, B01100000, B00011000, B00000110, B00000001, B00000000, // / 4, 8, B00111110, B01000001, B01000001, B00111110, B00000000, // 0 3, 8, B01000010, B01111111, B01000000, B00000000, B00000000, // 1 4, 8, B01100010, B01010001, B01001001, B01000110, B00000000, // 2 4, 8, B00100010, B01000001, B01001001, B00110110, B00000000, // 3 4, 8, B00011000, B00010100, B00010010, B01111111, B00000000, // 4 4, 8, B00100111, B01000101, B01000101, B00111001, B00000000, // 5 4, 8, B00111110, B01001001, B01001001, B00110000, B00000000, // 6 4, 8, B01100001, B00010001, B00001001, B00000111, B00000000, // 7 4, 8, B00110110, B01001001, B01001001, B00110110, B00000000, // 8 4, 8, B00000110, B01001001, B01001001, B00111110, B00000000, // 9 2, 8, B01010000, B00000000, B00000000, B00000000, B00000000, // : 2, 8, B10000000, B01010000, B00000000, B00000000, B00000000, //; 3, 8, B00010000, B00101000, B01000100, B00000000, B00000000, // < 3, 8, B00010100, B00010100, B00010100, B00000000, B00000000, // = 3, 8, B01000100, B00101000, B00010000, B00000000, B00000000, // > 4, 8, B00000010, B01011001, B00001001, B00000110, B00000000, // ? 5, 8, B00111110, B01001001, B01010101, B01011101, B00001110, // @ 4, 8, B01111110, B00010001, B00010001, B01111110, B00000000, // A 4, 8, B01111111, B01001001, B01001001, B00110110, B00000000, // B 4, 8, B00111110, B01000001, B01000001, B00100010, B00000000, // C 4, 8, B01111111, B01000001, B01000001, B00111110, B00000000, // D 4, 8, B01111111, B01001001, B01001001, B01000001, B00000000, // E 4, 8, B01111111, B00001001, B00001001, B00000001, B00000000, // F 4, 8, B00111110, B01000001, B01001001, B01111010, B00000000, // G 4, 8, B01111111, B00001000, B00001000, B01111111, B00000000, // H 3, 8, B01000001, B01111111, B01000001, B00000000, B00000000, // I 4, 8, B00110000, B01000000, B01000001, B00111111, B00000000, // J 4, 8, B01111111, B00001000, B00010100, B01100011, B00000000, // K 4, 8, B01111111, B01000000, B01000000, B01000000, B00000000, // L 5, 8, B01111111, B00000010, B00001100, B00000010, B01111111, // M 5, 8, B01111111, B00000100, B00001000, B00010000, B01111111, // N 4, 8, B00111110, B01000001, B01000001, B00111110, B00000000, // O 4, 8, B01111111, B00001001, B00001001, B00000110, B00000000, // P 4, 8, B00111110, B01000001, B01000001, B10111110, B00000000, // Q 4, 8, B01111111, B00001001, B00001001, B01110110, B00000000, // R 4, 8, B01000110, B01001001, B01001001, B00110010, B00000000, // S 5, 8, B00000001, B00000001, B01111111, B00000001, B00000001, //T 4, 8, B00111111, B01000000, B01000000, B00111111, B00000000, // U 5, 8, B00001111, B00110000, B01000000, B00110000, B00001111, // V 5, 8, B00111111, B01000000, B00111000, B01000000, B00111111, // W 5, 8, B01100011, B00010100, B00001000, B00010100, B01100011, // X 5, 8, B00000111, B00001000, B01110000, B00001000, B00000111, // Y 4, 8, B01100001, B01010001, B01001001, B01000111, B00000000, // Z 2, 8, B01111111, B01000001, B00000000, B00000000, B00000000, // [ 4, 8, B00000001, B00000110, B00011000, B01100000, B00000000, // \ backslash 2, 8, B01000001, B01111111, B00000000, B00000000, B00000000, // ] 3, 8, B00000010, B00000001, B00000010, B00000000, B00000000, // hat 4, 8, B01000000, B01000000, B01000000, B01000000, B00000000, // _ 2, 8, B00000001, B00000010, B00000000, B00000000, B00000000, // ` 4, 8, B00100000, B01010100, B01010100, B01111000, B00000000, // a 4, 8, B01111111, B01000100, B01000100, B00111000, B00000000, //b 4, 8, B00111000, B01000100, B01000100, B00101000, B00000000, // c 4, 8, B00111000, B01000100, B01000100, B01111111, B00000000, // d 4, 8, B00111000, B01010100, B01010100, B00011000, B00000000, // e 3, 8, B00000100, B01111110, B00000101, B00000000, B00000000, // f 4, 8, B10011000, B10100100, B10100100, B01111000, B00000000, // g 4, 8, B01111111, B00000100, B00000100, B01111000, B00000000, // h 3, 8, B01000100, B01111101, B01000000, B00000000, B00000000, // i 4, 8, B01000000, B10000000, B10000100, B01111101, B00000000, // j 4, 8, B01111111, B00010000, B00101000, B01000100, B00000000, // k 3, 8, B01000001, B01111111, B01000000, B00000000, B00000000, // l 5, 8, B01111100, B00000100, B01111100, B00000100, B01111000, // m 4, 8, B01111100, B00000100, B00000100, B01111000, B00000000, // n 4, 8, B00111000, B01000100, B01000100, B00111000, B00000000, // o 4, 8, B11111100, B00100100, B00100100, B00011000, B00000000, // p 4, 8, B00011000, B00100100, B00100100, B11111100, B00000000, // q 4, 8, B01111100, B00001000, B00000100, B00000100, B00000000, // r 4, 8, B01001000, B01010100, B01010100, B00100100, B00000000, // s 3, 8, B00000100, B00111111, B01000100, B00000000, B00000000, // t 4, 8, B00111100, B01000000, B01000000, B01111100, B00000000, // u 5, 8, B00011100, B00100000, B01000000, B00100000, B00011100, // v 5, 8, B00111100, B01000000, B00111100, B01000000, B00111100, // w 5, 8, B01000100, B00101000, B00010000, B00101000, B01000100, // x 4, 8, B10011100, B10100000, B10100000, B01111100, B00000000, // y 3, 8, B01100100, B01010100, B01001100, B00000000, B00000000, // z 3, 8, B00001000, B00110110, B01000001, B00000000, B00000000, //{ 1, 8, B01111111, B00000000, B00000000, B00000000, B00000000, // | 3, 8, B01000001, B00110110, B00001000, B00000000, B00000000, // } 4, 8, B00001000, B00000100, B00001000, B00000100, B00000000, // ~ }; int dIn = 7; // DIN pin of MAX7219 module int clk = 6; // CLK pin of MAX7219 module int cs = 5; // CS pin of MAX7219 module int maxInUse = 2; // Number of MAX7219's connected MaxMatrix m(dIn, cs, clk, maxInUse); SoftwareSerial Bluetooth(8, 7); // Bluetooth byte buffer[10]; char incomebyte; int scrollSpeed = 100; char text[100] = "TechKnowSkola "; // Initial text message int brightness = 15; int count = 0; char indicator; void setup() { m.init(); // MAX7219 initialization m.setIntensity(brightness); // initial led matrix intensity, 0-15 Bluetooth.begin(38400); // Default communication rate of the Bluetooth module } void loop() { // Printing the text printStringWithShift(text, scrollSpeed); if (Bluetooth.available()) { // Checks whether data is comming from the serial port indicator = Bluetooth.read(); // Starts reading the serial port, the first byte from the incoming data // If we have pressed the "Send" button from the Android App, clear the previous text if (indicator == '1') { for (int i = 0; i < 100; i++) { text[i] = 0; m.clear(); } // Read the whole data/string comming from the phone and put it into text[] array. while (Bluetooth.available()) { incomebyte = Bluetooth.read(); text[count] = incomebyte; count++; } count = 0; } // Adjusting the Scrolling Speed else if (indicator == '2') { String sS = Bluetooth.readString(); scrollSpeed = 150 - sS.toInt(); // Milliseconds, subtraction because lower value means higher scrolling speed } // Adjusting the brightness else if (indicator == '3') { String sB = Bluetooth.readString(); brightness = sB.toInt(); m.setIntensity(brightness); } } } void printCharWithShift(char c, int shift_speed) { if (c < 32) return; c -= 32; memcpy_P(buffer, CH + 7 * c, 7); m.writeSprite(32, 0, buffer); m.setColumn(32 + buffer[0], 0); for (int i = 0; i < buffer[0] + 1; i++) { delay(shift_speed); m.shiftLeft(false, false); } } void printStringWithShift(char* s, int shift_speed) { while (*s != 0) { printCharWithShift(*s, shift_speed); s++; } } void printString(char* s) { int col = 0; while (*s != 0) { if (*s < 32) continue; char c = *s - 32; memcpy_P(buffer, CH + 7 * c, 7); m.writeSprite(col, 0, buffer); m.setColumn(col + buffer[0], 0); col += buffer[0] + 1; s++; } } Description: First we need to include the SoftwareSerial.h library which will enable the Bluetooth communication and define some variables needed for the program. In the setup section we need to initialize the Bluetooth at its default baud rate of 38400 bits per second. I set the initial text message to be “TechKnowSkola” with 100 milliseconds delay scrolling speed. Next, in the loop section, using the Bluetooth.available() function we check whether there is incoming data from the serial port and if that’s true using the Bluetooth.read function we start reading the serial port, one byte each iteration. So the first incoming byte will be always stored into the “indicator” variable and according to it choose whether we will change the text message, the scrolling speed or the brightness of the LED matrix. If we take a look at the Android app code blocks we can notice that when the “Send” button is clicked, first we send the indication byte, in this case “1”, which means we want the change the text message. In order to do that, at the Arduino side, we will clear the whole character array and also clear the LED matrix display. Then in the “while” loop we will read the rest of the data in the serial port, and that’s the messaged typed in the text box of the Android app. In case the indication variable is “2”, that means we have changed the position of the scrolling speed slider, so we will read its new value using the Bluetooth.readString() function and adjust the scrolling speed. In the same way we adjust the brightness of the LEDs. You can download the app from the following link: https://drive.google.com/open?id=1xvR_tyTF-zzdrqc6RrdHlcD5FRICIbs5 Reference URL GET IN TOUCH We'd love to hear from you Contact Us

About TechKnowSkola Techknowskola – an integrated platform dedicated solely to technology and knowing how to use the technology to its full potential. Our framework is not only based on the principles of STEAM but the 21st-century skills set therefore providing an Inter-disciplinary educational approach that aims to inculcate a DIY mindset, concurrently learning the 4Cs of the 21st-century skillsets. Critical Thinking, Creativity, Collaboration and Communication. Thus igniting an everlasting interest /impact on how to learn, how to ask questions, how to experiment and how to create we aspire to facilitate learning environments that are relevant, holistic, dynamic, student-centred and fluid as these are vital for a student’s development Such an environment not only contributes towards the success of a student but prepares them for life. Teaching relevant, in-demand skills is the need of the hour in this rapidly evolving workforce & society to prepare students to become future innovators which empowers them further to become job creators. LAB SETUP 7 (6) 7 (4) 7 (2) 7 (1) 6 (11) 5 (21) 5 (20) 5 (17) 5 (18) 5 (16) 5 (15) 5 (14) 5 (12) 5 (13) 5 (11) 5 (10) 5 (9) 5 (7) 5 (4) 5 (6) 5 (5) 5 (3) 5 (2) 5 (1) 4 (7) 4 (6) 4 (5) 4 (3) 4 (2) 4 (1) 3 (3) 3 (2) 3 (1) 2 (11) 2 (9) 2 (10) 1 (7) 2 (6) 2 (4) 2 (3) 2 (2) 2 (1) 1 (6) 1 (5) 1 (3) 1 (1) 1 (2) IMG-20191130-WA0014 IMG-20191217-WA0044 IMG-20191217-WA0041 IMG-20191217-WA0042 IMG-20191130-WA0031 IMG-20191130-WA0029 IMG-20191130-WA0027 IMG-20191130-WA0024 IMG-20191130-WA0022 IMG-20191130-WA0018 IMG-20191130-WA0019 IMG-20191130-WA0017 IMG-20191130-WA0015 Teacher's Training IMG-20200130-WA0069 IMG-20200128-WA0068 IMG-20200128-WA0061 IMG-20200128-WA0042 IMG-20200128-WA0045 IMG-20200128-WA0041 IMG-20200110-WA0042 IMG-20200110-WA0041 IMG-20200109-WA0067 IMG-20200109-WA0068 IMG-20200109-WA0059 IMG-20200109-WA0056 IMG-20200109-WA0053 IMG-20200109-WA0052 IMG-20200109-WA0051 IMG-20200109-WA0043 IMG-20200109-WA0029 IMG-20200108-WA0015 IMG-20200108-WA0012 IMG-20200108-WA0010 IMG-20200107-WA0069 IMG-20200107-WA0065 IMG-20200107-WA0060 IMG-20200107-WA0058 IMG-20200107-WA0046 IMG-20200107-WA0024 IMG-20200107-WA0020 IMG-20200107-WA0017 IMG-20191219-WA0107 IMG-20200107-WA0014 IMG-20191219-WA0106 IMG-20191219-WA0084 IMG-20191219-WA0042 IMG-20191219-WA0043 IMG-20191212-WA0138 IMG-20191212-WA0139 IMG-20191212-WA0131 IMG-20191212-WA0089 IMG-20210728-WA0030 IMG-20191211-WA0013 IMG-20191211-WA0008 IMG-20191211-WA0007 IMG-20191203-WA0074 IMG-20191203-WA0083 IMG-20191203-WA0068

Company Legal Details Registered Address First floor, KH No 60/22, Plot No 33, New Gopal Nagar, Najafgarh, New Delhi - 110043 Mailing Address First Floor, Shop No 10, Dhansa Marg, Opp Nanda Enclave, Najafgarh, New Delhi 110043 GSTIN: 07AAJCT1713B1ZS CIN: U80902DL2022PTC393489 Bank Details: Account Holder: TECHKNOWSKOLA PRIVATE LIMITED Account Number: 2647918298 IFSC: KKBK0000298 Bank & Branch: KOTAK MAHINDRA BANK, BADSHAPUR Account Type: CURRENT UPI VPA - techknowskola@upi Contact Information: Email: Contact@techknowskola.com Phone: +91-9891232129 [We're solely reachable through WhatsApp. Please send a text there for our assistance.] Reach out to us via email or WhatsApp for inquiries, collaborations, or any other assistance. We are eager to connect with you and explore how Techknowskola can inspire greatness in the field of STEAM education. Let's embark on a journey of learning, innovation, and excellence together! 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Back Interfacing of Force Pressure Sensor with Arduino Uno. What is a Force Pressure Sensor? An FSR (Force Sensitive Resistor) or Force Pressure Sensor is a sensor that allows you to measure physical pressure, weight and squeezing. The resistance of an FSR varies as the force on the sensor increases or decreases. When no pressure is being applied to the FSR, its resistance will be larger than 1MΩ. The harder you press on the sensor’s head, the lower the resistance between the two terminals drops. By combining the FSR with a static resistor to create a voltage divider, you can produce a variable voltage that can be read by a microcontroller’s analog-to-digital converter. Material Required: Material Quantity Arduino Uno 1 Force Pressure Sensor 1 Jumper cables 4 LED 1 Resistor 1 ( 10 k) Pinout Diagram: Circuit Diagram: The connections are pretty easy and straight forward. Make the circuit by referring the images. The FSR has two pins, one will be connected to 5V pin. The other to A0 directly and to Gnd pin via a resistor. If you need to connect the LED and control it's brightness, then connect it across pin 13 and Gnd of the Arduino. Tested Programming Code: int fsrPin = 0; // the FSR and 10K pulldown are connected to a0 int fsrReading; // the analog reading from the FSR resistor divider void setup(void) { Serial.begin(9600); } void loop(void) { fsrReading = analogRead(fsrPin); Serial.print("Analog reading = "); Serial.print(fsrReading); // the raw analog reading if (fsrReading == 0) { Serial.println(" - No pressure"); } else if (fsrReading < 10) { Serial.println(" - Light touch"); } else if (fsrReading < 50) { Serial.println(" - Light squeeze"); } else if (fsrReading < 150) { Serial.println(" - Medium squeeze"); } else { Serial.println(" - Big squeeze"); } delay(1000); } Precautions: 1. Double check the connections before powering on the circuit. 2. Don’t use loose jumper cables. 3. Check whether proper board is selected from Arduino IDE. 4. Ensure proper placement of Force Pressure Sensor for correct working. 5. Don’t lose hope if Force Pressure Sensor does not run properly for the first time, try again. Conclusion: Once your sketch is running, you have to open your serial monitor. There you can see the Pressure applied on the sensor as Light , Big or No squeeze. Reference URL GET IN TOUCH We'd love to hear from you Contact Us

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Our Services At TechKnowSkola, we distinguish ourselves by understanding the individual needs of our customers and tailoring our services accordingly. Our dedicated team of specialists is always ready to take on unique challenges and find the perfect solutions. With a focus on quality, competitive pricing, and unparalleled service, we are here to help you empower the next generation of learners and innovators. Choosing TechKnowSkola as a solution partner ensures that educational institutions receive a comprehensive and innovative approach to STEAM education. From customized solutions and continuous support to fostering inclusivity and a lifelong learning mindset, we are dedicated to empowering the next generation of leaders, thinkers, and creators in the world of Science, Technology, Engineering, Arts, and Mathematics. Comprehensive STEAM Solutions Aligned with NEP 2020 Experiential Learning & Project-Based Approach Expert Team of Educators and Mentors Customized Solutions for Diverse Institutions Proven Track Record of Success Curriculum & Project Guide Fostering the Innovators of Tomorrow Ultimately, TechKnowSkola stands as a trusted solution partner for educational institutions looking to create a cutting-edge STEAM ecosystem. Our commitment to excellence, alignment with NEP 2020, and focus on fostering future-ready students make us the ideal choice for institutions seeking to elevate their STEAM education offerings and prepare students for success in an increasingly technology-driven world. We TEACH How to ASK How t o LEARN How to EXPERIMENT Our Array of Services Includes: Atal Tinkering Lab AI & Robotics Lab Other Labs PM Shree Training & Support Smart Boards Planetarium Show Atal Tinkering Lab Atal Tinkering Lab: The Key to India’s Brighter Future With a vision to ‘Cultivate one Million children in India as Neoteric Innovators ’, Atal Innovation Mission is establishing Atal Tinkering Laboratories (ATLs) in schools across India. The objective of this scheme is to foster curiosity, creativity, and imagination in young minds; and inculcate skills such as design mindset, computational thinking, adaptive learning, physical computing, etc. TechKnowSkola is your go-to partner for creating a fully equipped, state-of-the-art Atal Tinkering Lab (ATL) at your educational institution 1 2 3 4 5 Training Support Documentation Support 6 Access to Digital Classroom 7 Discount of Consumables Items Warranty & AMC 8 Competition Support 24*7 Online Support 9 Curriculum & Project Guide Free Installation 10 Regular Visits T&C's Apply "Got queries or need assistance with your Atal Tinkering Lab? Fill out the form, we'll be delighted to help!" AI & Robotics Lab Ships Worldwide✈️ "Unleash Innovation with TechKnowSkola's AI & Robotics Lab!" TechKnowSkola's AI & Robotics Labs bring the excitement of hands-on learning straight into the classroom! Each lab is a gateway to digital, interactive guides covering various STEAM topics and essential tech skills. With captivating topics like coding, AI, robotics, and more, students explore the limitless possibilities of technology. Whether it's physical equipment or wifi-based labs, our immersive learning experiences empower students to unleash their creativity and innovation. Embrace the future of education with TechKnowSkola's AI & Robotics Labs, shaping bright minds for tomorrow's world. The journey of discovery begins here! What's Included 01 Coding & Programming 03 Artificial intelligence 02 Electronics & Internet of Things 04 Data Science & Machine Learning TechKnowSkola fosters creativity, innovation & learning in STEAM (Science, Technology, Engineering, Arts, Mathematics) education. Our AI & Robotics Lab, aligned with NEP 2020, cultivates 21st-century skills like critical thinking, collaboration, and problem-solving. Through hands-on experiences in AI, robotics, programming, and more, students become future-ready for a digital world. Join us to nurture the innovators of tomorrow! Why teachers will love it Ease of use Connection to curriculum Open the box and go! Step-by-step teacher guides included. Why students will love it too! Physical, tangible interactions Offline download of exercises Group activities Career Exploration We value your interest! Please take a moment to fill out the form below, and our team will be delighted to provide you with the assistance you need. STEAM Lab Empowering the Innovators of Tomorrow through STEAM Education Ships Worldwide✈️ At TechKnowSkola, we believe that the future belongs to those who can harness the power of Science, Technology, Engineering, Arts and Mathematics (STEAM). Our STEAM Lab is a dynamic space where young minds embark on a transformative journey of learning, creativity, and innovation. What to Expect in TechKnowSkola's STEAM Lab? Engaging Activities From building robots to coding programs, our STEAM Lab offers a wide range of engaging activities that spark curiosity and ignite a passion for learning. Cutting-Edge Tech Our STEAM Lab is equipped with state-of-the-art technology, including 3D printers, robotics kits, and more, providing students with a glimpse into the future. Project-Based Learning We believe in learning by doing. Students work on exciting projects that challenge their skills and encourage them to think critically. Inclusive Environment At TechKnowSkola, we prioritize safety and foster an inclusive environment where every student feels valued and encouraged to explore their interests. LEGO Lab ​ Building Dreams, One Brick at a Time: Discover Limitless Possibilities in the LEGO Lab! Grade 1 - 5 BricQ Motion Prime Grade 6 - 9 BricQ Motion Essential Grade 6 - 9 LEGO Education SPIKE Essential Grade 6 - 9 LEGO SPIKE Prime 3D Printing Lab Unlocking the Future: Where Imagination Takes Shape in Our 3D Printing Lab! At TechKnowSkola's 3D Printing Lab, we embrace the power of emerging technology - Additive Manufacturing. Experience the speed and versatility of 3D printing, revolutionizing industries from automotive and aerospace to defense and biomedical applications. Our lab aims to provide unparalleled exposure, enhancing knowledge and skills in this cutting-edge field. Join us to unlock a world of possibilities and become future-ready innovators in the realm of 3D printing. AR & VR Lab Embark on Immersive Adventures: Explore the Boundless Realms of AR & VR in Our Lab TechKnowSkola's AR & VR Lab offers an immersive journey into the realms of augmented and virtual reality, where students can explore cutting-edge technology, unleash their creativity, and develop future-ready skills. Through hands-on experiences, they delve into virtual simulations, collaborative projects, and interactive educational content, preparing them for a tech-driven world and inspiring real-world impact. Training & Support Discover TechKnowSkola's Unparalleled Training & Support For ATL's (Atal Tinkering Labs): For Others Lab: 📑 Documentation, 💼 PFMS & 🛒 GeM Support 📞 24/7 Telephonic Support 🎓 Onsite Teachers Training 📱 Hybrid Student Training 🎯 4 Activities/Month 🤝 Event Guidance 📚 Curriculum & Projects 💻 Digital Classroom Access 🗣️ 2 Virtual Feedback Meetings/Month 💰 Discounted Consumables & Spares 🏆 Competition Support 🔧 AMC Support 📚 Custom Curriculum 💻 Digital Classroom Access 🎓 Capacity Building Sessions 📞 24/7 Telephonic Support 🤝 Activity Guide 📝 Project Sheets 🌟 & Much More! Smart Board "TechKnowSkola IFP: Unleashing the Future of Interactive Learning! Experience the Next Level of Learning with our Interactive Flat Panel (IFP) featuring K-12 Digital Content and cutting-edge specs. Our Teknowskola IFP boasts an Android & win 11 OS with 4K resolution and multi-touch capabilities, providing a seamless and immersive learning experience. Key Features: ✍️ Zero Bonding: Enjoy an unmatched writing experience with smooth and lag-free interactions. 📺 4K Resolution: Crystal-clear UHD display with a resolution of 3840 * 2680, bringing content to life. 🚀 Android 11 OS: Powered by T982 | 4G+32G for fast and efficient performance. 🛡️ Warranty: Rest assured with a 3-year warranty for peace of mind. 🖐️ Multi-touch: Enjoy 40 points for Win 10/11 and 20 points for Android interactions. ⏳ Long Screen Life: With 50,000 hours of screen life, the IFP ensures enduring performance. 💻 Dual OS: Seamlessly switch between Windows 11 and Android as needed. Why Us? Built-in Digital Content: Access over 2 million learning resources, 50,000+ animated videos, 1 lakh+ questions, and 10,000+ interactive games, making learning engaging and comprehensive. Impeccable Writing Experience: Experience lag-free and natural writing, enhancing classroom interactions. No Ongoing Maintenance: After installation, the IFP requires no ongoing maintenance, ensuring hassle-free usage for over 10+ years. Powerful Pricing: Get these interactive flat panels at unbeatable prices, revolutionizing interactive learning for all." Specifications

TechKnowSkola The Technology School By Engineers & Innovators We’re a team of professional engineers working hard to improve the way our communities run. At TechKnowSkola the technology school by engineers & innovators, We believe our decisions today shape future leaders, and that's why we always uphold high standards in our work. Incubated & Supported by DPIIT Recognised Available on GeM MSME Registered Recognized with a 4.5-star rating for outstanding services encompassing Atal Tinkering Lab, PM Shri Schools, and AI-Robotics Lab solutions Welcome to Techknowskola! We are dedicated to embracing technology and unlocking its full potential. Going beyond STEAM principles, we focus on 21st-century skills. Our integrated approach encourages a DIY mindset while mastering the 4Cs: Critical Thinking , Creativity , Collaboration , and Communication . Get ready to ignite curiosity, experiment, and create wonders! At Techknowskola , we create exciting, holistic, and student-centered learning environments. We believe this is crucial for your development and future success. Our goal is to equip you with relevant, in-demand skills for today's dynamic workforce, making you future innovators and potential job creators! Come and be a part of this incredible journey of exploration and growth! Together, let's dive into the world of technology and unlock your full potential! Our Story It all began with a group of people who dreamt of starting something completely new. We had a great vision, a passion for change, and all the right skills. Together, we established TechKnowSkola the technology school by engineers & innovators, a company dedicated to finding cutting-edge solutions and providing great services. Our Mission Empower every student for a brighter future through technology Hands-on Learning Active, practical experiences for meaningful understanding. DIY Approach Empowering students to explore, create, and excel for a fulfilling future. Innovative Problem-Solving Encouraging creative solutions through PBL & Design Thinking. Thinking-Based Learning Fostering critical thinking & curiosity for complex problems. Competency-Based Learning Personalized progress for comprehensive skills. Our Methods Our methodology involves engaging students in Science, Technology, Engineering, Arts, and Mathematics (STEAM) to foster well-rounded, critical thinkers and problem solvers OUR SERVICES Atal Tinkering Lab AI & Robotics Lab STEAM Lab LEGO Lab 3D Printing Lab Support on PM Shree Training & Support Know More LAB RESOURCES Know More Know More We offers diverse lab resources aligned with your educational institution's Lab setup, including curriculums, teaching materials, activity sheets, and more. ​ Know More GLOBAL REACH We support schools worldwide with affordable STEAM Labs. Our goal: Empower schools beyond India with modern, practical, and innovative education Know More TKS ACADEMY Where kids learn to build drones, robots, code, and more! Igniting creativity and innovation for the future. Join us today! Know More COURSES Empower yourself with affordable self-learning courses. Get ahead of the competition and achieve success on your own terms. Enroll now! Know More OUR TEAM Passionate tech enthusiasts and educators inspiring young minds in robotics, coding, and technology. Empowering the next generation of innovators for a bright future. Know More OUR WORK Our work in empowering young minds with STEM education and related initiatives. Know More EVENTS & COMPETITIONS Exciting events showcasing innovative robots in challenging tasks, inspiring STEAM enthusiasts worldwide. Know More Our Track Record Speaks for Itself 7500+ Schools 17500+ Teachers Trained 5 Lakh+ Students Impacted Our Guiding Philosophy At TechKnowSkola, we believe in the power of knowledge to transform lives. Our guiding philosophy revolves around three core principles: Accessibility | Innovation | Empowerment Aligned with