I love this: it’s cheap, effective and pretty simple to do. Basically, you take a 2$ Radio Shack piezoelectric transducer and use it as pickup. One thing bothers me a bit though: you need to drill a hole in the guitar to fit the jack. I’m quite sure there’s a way to go around this. And who cares, I don’t have a guitar ;)

I might build an acoustic bass out of scrap wood I have at home, and that sort of pickup would be perfect for it.

Cheap Acoustic Guitar Pickup [link][via]

This isn’t exactly a set of instructions, but anyone familiar with the Arduino should be able to make up something similar to this. With nice pads (think recycled mousepads) and some nice packaging, this could make up a great electronic drum set.

I’ll be exploring this in the next year as I’d really like to have a drum set at home, but lack the space and don’t want to spend much money on this. Plus, the ability to control a drum machine by playing “real” drums is more interesting (to me) than playing a “real” drum. I can’t get enough of that TR-808 bass drum.

DIY Arduino MIDI Drum Kit [link]