Picture of Hack a voice changer to add an Arduino input
Another quick hack. I purchased a voice changer because I was looking for something cheap that could be hacked into an voice input device. Basically I wanted to animate a skull when I spoke. Added bonus, now the skull puppet would also have a scary voice.
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

Picture of What you'll need
I am assuming that you have a little bit of electronics and soldering experience. I will also assume that you have some familiarity with Arduino.

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
Could I use the arduino to add in a new distortion for the voice?
fjordcarver (author)  blinkyblinky3 years ago
Big place, usually has a Mark Donald's restaurant inside.
fjordcarver (author)  blinkyblinky3 years ago
I don't like advertising, is it poor Instructables form to use the wrong names? I figured it would be clear enough. Sorry for the confusion.
I'm joking around but it may be confusing to others.