Here is the diagram of my Arduino infrared close proximity sensor. As you can see, ... [code] #define ALERT_LED 13 //SIGNAL LED . void setup() { TCCR1A = 0b10110010; ... The system works by emitting a ...

When an LED (IR or otherwise) is reverse biased it can act as a light sensor. ... normally be when using a more common modulated IR receiver module. All of the Arduino code you need to get up ...

The entire system is built on the backbone of an Arduino Uno with a few other parts totaling at about $150. That seems expensive, but DeBoisblanc's build covers a lot of ground.

The serial communications is I2C and there’s a tiny optical sensor onboard along with an IR LED. Of course, you could send other keys than media controls. We wouldn’t mind going back and ...