This is a little (often annoying) piece of hardware.
The original design was posted on PopSci.com back in 2008.
I've refined the schematic and made a board layout in Eagle which you can download below.
Connect a 9V battery block via the EXTPWR pin header.
Connect a 8 Ohm speaker via the EXTSPKR pin header.
By bridging pins 1 and 2 of the AON jumper you can over-ride the switch and have the device 'always on'.
I didn't invest too much time into finding a suitable push button, so feel free to modify the design with a button of your choosing.
All files released under Creative Commons non-commercial, by attribution, share-alike.
The rev2_20100830 board is not tested.
The only live and working setup is a perf-board based system.
project/optical_theremin.txt · Zuletzt geändert: 2012/07/13 10:45 von 126.96.36.199