speak & math

[corex]

i recently finished my first bending project. i got a speak & math off ebay for $20. i gathered all the bends i could find on the net and sorted out the ones i wanted.

some came from here:
http://experimentalistsanonymous.com/diy/Schematics/Circuit%20Bending%20and%20Modifications/
and some from http://casperelectronics.com and i think a few other places.

here's the work in progress with the leads soldered in and my schematic:


with the holes drilled in the faceplate:


internal wiring completed:


the finished unit:


and finally, i have recorded a few minutes of screwing around with it here (11MB):
http://phlake.org/circuit_bending/project%2059%20v1.1%20speak%20&%20math.mp3

in the process of building it, i screwed up a couple of buttons on the front panel by peeling back the membrane, and now "on", "word problems" and "off" don't work any more. i have a circuit-kill button anyway, so that works for "off". i hacked in an extra "on" button from a short i'd found when i was testing bends. i figure i'll just live without "word problems".

i haven't broken any new ground here, but i'm happy that my first project came out so well.

[Lorenzo]

well done!!


this is my S&M:

[corex]

Interesting -- what bends have you got in there?

[Lorenzo]

[philoop]

how to wire the reset button?
can someone help me ?
mine is only showing 000000000
did i overbend it?
can i reset?

[corex]

Does popping the batteries out for a moment fix it? If so, then...

My reset switch is a momentary, normally closed (NC) switch. I wired it to the positive battery terminal so that when the switch is pressed, it disconnects the battery.