March 2010 Leather Desktop Chorder

Sunday afternoon project. This right hand chorder uses the atmega168 chip. It is built on a Radio Shack 276-150 printed circuit board which greatly reduces the need to run wires around. It uses Cherry keyswithches with replacement lighter weight springs. It was used to create and edit this wiki page.

-Greg

as tested prior to final glue up (Don’t glue the case closed before you know it all works!)
Underside of the plastic board with keyswithches all wired
circuit - board has been cut away to fit in to the case. Since switches are close, no pullup resistors are used in this build. Keyswitches are wired to an eight pin sip socket
underside of circuit - as you can see, only a few jumpers are needed and much more of the board could be cut away if need be
foam keeps the keyswitch pins from contacting the circuit board and keeps everything in place
circuit board in position
a little more foam to keep circuit board from moving around in the case
exterior showing layers of leather - note that the thumb side of the chorder is quite a bit higher than the pinkie side and that it also is lower on the edge facing closer to your palm
exterior showing layers of leather and slope of case
leather trimmed, contact cement drying before attaching bottom. (I always put a date on it somewhere.)
thin exterior layer (white fake leather) contact cement drying
assembled
cleaned up
spiffchorder/2010-03-leather.txt · Last modified: 2010/03/23 21:30 by priestdo
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