I recently had to build an infrared close proximity sensor that could tell if something was dropped in a parcel delivery drop box. After some searching, I ended up using a microcontroller and a piece ...

The circuit is based around this Sputnik-looking standalone IR temperature sensor which ... [MakeFunStuff] paired this easy-to-use sensor with an Arduino Nano and five LEDs that show how hot ...

A simple circuit paired with a Pi Pico ... [Gregory] figured out the codes by using an Arduino to read the output of the TV’s remote with an IR sensor. The hook here is the code is written ...