While it might seem simple on the surface, the project comes with an in-depth guide on programming the PIC family of microcontrollers, and has a polish not normally seen on beginner projects ...

An Arduino is a popular open-source single-board microcontroller. Learn how to program one and let the possibilities take shape.

On a microcontroller, though, you’ll have to roll your own CPU load meter with a few parts, some code, and a voltmeter.