int pirPin = 2; // PIR sensor output connected to pin 2 int ledPin = 13; // LED connected to pin 13 (or relay module) ...

Learn how to use the Arduino nRF24L01 module for wireless communication. This beginner-friendly guide covers wiring, code, and troubleshooting to kickstart your Arduino RF projects.

Build a Speed Sensor using Arduino with IR speed sensors to accurately measure the speed of moving objects. This tutorial covers circuit design, sensor calibration, speed calculations, and optimized ...

Also note that the Theremin demonstrated here is a stripped-down (and tricky) version of the far-famed proximity-controlled musical instrument – the key difference is that it employs a cheap light ...

Ultrasonics sensor, IR sensor, Photoresistor sensor, Arduino, Arduino cable Good internet connectivity Arduino IDE Essential tools are a multimeter, soldering iron, solder, and wire cutter. Arduino ...