Clockwork Robot makes a Atari Punk Console synth/noise maker, the Colossus Synthesizer, that fits in an Altoids Tin.

via MarbleMad:

hHere we have the synthesizer (a tweaked Atari Punk console) and a clock + power all housed in one altoids tin and an analogue sequencer housed in a second Altoids tin.

Later a second sequencer module is added to increase the number of steps from 8 to 16.

If you’ve built the Colossus Synthesizer, leave a comment with your thoughts!