Here is the diagram of my Arduino infrared close proximity sensor. As you can see, the core part of my experimental setup is an Arduino UNO, ... (Arduino Uno/Nano Sketch)… [code] #define ALERT_LED 13 ...

A distance sensor provides basic gesture recognition and a microcontroller ... Not bad, and it even makes a passable keychain. Parts list, code, and 3D ... Inside the light is an Arduino ...