So you would like to build your own Stormtrooper Voice Changing helmet? SparkFun has you covered. Their Vox Imperium guide shows you how to build an in-helmet voice modulator. You are going to need a Teensy 3.2, speakers 1Ah battery, resistors, and a few other components to get started.
More gadgets like this: here
Vox Imperium Helmet Sound System
Those of you familiar with Arduino or Raspberry Pi are going to have an easier time building this on your own.
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