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Hack a calculator to make crazy sounds or say wacky things just for fun.
1. A calculator 2. A device that uses a recording module. In my case I found a cheap automotive memo thingy that sticks to the windshield and allows y...
Before you do anything else, record what you want the calculator to "say" on the module. I actually ran a jumper from the microphone input to a mini p...
Take apart the calculator and decide what key you want the sounds to play from. I chose the EQUAL sign key because that always has to be pressed. You ...
Run two small wires from each side of the contact on the calculator key you decide to use. Then run those two wires to the playback contacts on the mo...
Close up the calculator and make sure no wires are sticking out. Re-insert the battery and your calculator prank is ready to use! Each time the "=" si...
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