This one caught my eye on twitter, the Arduino Audio Meter - an Arduino-based device described as spectrum analyser and guitar pedal in one... It's based on the Uno board, to be precise, fitting ...
The Clapper was a goofy little device popular in the '80s and '90s that made it so you could turn on any outlet in your house with a clap. Make shows off how to build your own version of that device ...
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