Libraquarius

This is a very simple project, and I might get around to publishing the details for anyone wishing to build a metronome for virtually nothing. Having said that, there are much better devices avalable which provide so much more than the simple volume and speed controls my little botch-job has, and for just a few pounds / bucks.

It uses a simple and cheap electronic timer chip (NE555), and is housed in a pound-shop / dime-store computer speaker.

quote