Got an Arduino board laying around? Make your own oscilloscope in only four steps. It might be the geekiest DIY project ever.

Those of you new to electronics or the functions and menus of an oscilloscope may be interested in a new tutorial which has been published by James the “Bald Engineer” using little Arduino and ...

The project is called xoscillo, and it allows an Arduino, or a Parallax USB Oscilloscope, to probe the signals while a computer does the heavy lifting.

[Privatier] wrote in to let us know about lxardoscope, his project that lets you use an Arduino as hardware input for a Linux-based oscilloscope display. This implementation offers two channels wit… ...

And yes, you can buy remote outlets with separate controls, but this one lets you use a control you already have. Plus, it's an excellent learning project if you're just getting started with Arduino.