Hacked Calculator Prank

Step 2 Prepare the Recording Module

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 plug that plugged into my audio card on my PC and then I recorded some .wav sound effects.

Then disassemble the device to get to the recording module. You can clip the microphone connections or leave them depending on how much room you have inside the calculator.