Apart from the Arduino UNO, the circuit consists of two more ... sensor drives an infrared emitter to illuminate an object, then looks for the reflectance from the object to detect its close proximity ...

The part list consists of one Arduino, two resistors, and one IR emitter. That’s right, an emitter. When an LED (IR or otherwise) is reverse biased it can act as a light sensor. The main ...

In the case of his space heater an Arduino was used to record and later retransmit the “power on” IR code to the heater ... Maybe he will add a temperature sensor someday so it doesn’t ...