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 ...

Posted in Arduino Hacks, Lifehacks Tagged 9V battery, arduino, arduino nano, IR temperature sensor, leds, lever switch, limit switch ...

If you’ve done 3D printing, you’ve probably at least heard of Tinkercad. This popular CAD package runs in your browser and was rescued from oblivion by Autodesk a few years ago. [Chuck]… ...