The microcontroller-based concept was chosen because I wanted to scale the sensor system later to suit other applications. Here is the diagram of my Arduino infrared close proximity sensor. As you can ...

is “a single-pixel infrared camera that picks up everything in a 90° cone starting at the sensor.” [MakeFunStuff] paired this easy-to-use sensor with an Arduino Nano and five LEDs that show ...

A bit of thought led him to build a reflective sensor which can measure the spinning of a wheel (translated). He got his hands on an infrared phototransistor which had been used as part of the ...