Would a wind-up light that doesn't rely on charging a battery, but uses a clockwork mechanism to directly power a small generator which lights up an LED, be possible? [more inside]
posted by yesno on Oct 11, 2008 - 17 answers

Tattoo-filter: where can i get hold of pictures or schematics of clockwork devices with cogs and things? [more inside]
posted by robotot on Oct 31, 2007 - 13 answers