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 ...

Such a a useful circuit ... 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 ...

[Chuck] recently did a video about a new Tinkercad feature: building and simulating virtual Arduino circuits. You can watch it below. There are a variety of components you can add to your design.