This Peace pendant project is a great way to hone your 3D printing + electronics skills.

The circuitry for this wearable project isn't that complex, and the 3D printed enclosure will provide a compact pendant that you can wear to your next party or event.

This guide was written for the 'original' Gemma board, but can be done with either the original or M0 Gemma. We recommend the Gemma M0 as it is easier to use and is more compatible with modern computers!


  • Sound reactive
  • Rechargeable
  • On/Off switch
  • Programmable

Before you begin, please read the following prerequisite guides:


Tools and Supplies:

  • Access to a 3D printer with filament.
  • Soldering Iron with solder.
  • Wire Strippers and pliers.
  • Hot glue gun and super glue.

This guide was first published on Jan 30, 2016. It was last updated on Jul 13, 2024.

This page (Overview) was last updated on Mar 08, 2024.

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