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Thu 26 Apr, 2007 09:39 am
This gimmick involves finding a high-tech greeting card, the kind with hardware built in to play music or sound effects.
You'll also need an NPN switching transistor from your local electronics store and a few tools to disassemble and reassemble the keyboard.
Got all that?
Then you must ....
... more infos on
this video and
here are the instructions