I am going to show you how to hack a voice changer to use as a digital input for an Arduino project. I leave the output or reaction up to you.
Step 1: What you'll need
You will need
- A voice changer module. (8$ at Wallymart)
- A 741 opamp ic.
- an LED of choice (not necessary, but provides a cute little visual input that things are working, and will provide clues as to how to change the circuit into a LED light organ.)
- a resistor for your led (220 ohms - 1 k will work alright, you only need this if you are using the LED)
- some hookup wire.
- Soldering iron and solder
- wire snips
Step 2: Open 'er up
Start by removing the battery cover and batteries as there are two screws hiding under the batteries.
Flip the unit over and remove the other two long screws. You can leave the belt clip intact. The two short screws can be left in even though I didn't. They hold the switch in position and removing them will only mean that you will need to line it up again later. Learn from my mistakes and leave them in.
There, four screws out (plus one for the battery cover) and you should be able to look inside.
Kind of exciting eh.