Don't get sad, Make something!

Lady Ada came up with this project when one of her favorite sites was taken down (, so she made her version using Adafruit breakout boards.

In this project, the Trellis triggers samples on an Adafruit Audio FX soundboard. The Pro Trinket interfaces between the two over serial and i2c and ties the samples to the buttons.

All-In-One Soundboard

It's a really slick way to make a compact, all-in-one sound board. This version of the Audio FX Soundboard features a built in amp so you can wire speakers up to terminals or directly on the board.

Whenever a Trellis key is pressed, there's a loop in the arduino sketch that listens for button presses and plays back a sample from a list.

Prerequisite Guide

We recommend walking through the guides below to get familiar with the components used in this project.


You'll need the following parts below to complete this project.

  • Pro Trinket 5V
  • Trellis Driver PCB
  • Audio FX Soundboard w/ Amp
  • Pro Trinket Lipo Backpack Add-on
  • Silicone Elastomers 4x4 button keypad
  • Slide Switch
  • 1200mAh Lithium Polymer Battery
  • 3mm diffused LEDs (any color!)

Tools & Supplies

The follow tools will assist you in building this project.

  • Soldering Iron
  • Wire Strippers
  • Wire Cutters
  • 3D Printer
  • Panavise Jr.
  • Helping Third Hand
  • 3D Printing Filament
  • Blue Painters Tape
  • 30AWG Silicone Coated Stradned-core wire 
  • Heat Shrink Tubing
  • Screw Driver
  • #4-40 3/8 Phillips machine screws

This guide was first published on Apr 13, 2015. It was last updated on Jul 11, 2024.

This page (Overview) was last updated on Mar 30, 2015.

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