Theremin-inspired fart machine
Last updated: 1st February 2006
We genuinely believe this to be a first: a Theremin-controlled fart machine! Walk too close and it'll fart at you!
Direct from the inventor himself:
It's basically a dual 555-based square wave
oscillator which uses a high pitch sound and a low pitch sound and
logical ANDs them together (with a 3 input 4000 series NAND gate) with
the ambient 50Hz mains picked up by AC coupling between humans and the
bit of wire.
It's a bit flakey but you get some ripe ones
occasionally. There's a really crappy R-C low-pass filter and a
primitive single transistor audio amp on the output stage to give it
some wumph! Amp transistor gets a bit toasty but the severe lack of
current from the Tescos value battery seems to keep it coolish.
I might even do a schematic if I can be arsed...
Sound samples to follow shortly...
©2006 Chris Smith
This page was last updated: 1st February 2006 at 3:37pm GMT