Portable DIY Teensy Synth
Contributors:
Chowdah
Chowdah 
The Build
While all hard-case synth-for-the-end-of-the-world designs will be different, below is an overview of how this synth was built. While you can use what's outlined here verbatim, I'd invite you to take these general concepts and run with them, making something amazing and all your own. First, the materials that you will need are listed below:
Materials
Mechanical
- Hard Case: dimensions good, a bit flimsy
- Speakers
- Speaker Grille [3D-printed]
- Buttons support [3D-printed]
- (8) M3 x 12mm screws [screw/nut pack Amazon]
- (8) M3 nuts [screw/nut pack Amazon]
Connectors
- Solid-core hook-up wire kit
- (2) 3.5mm stereo cables
- 3.5mm signal splitter [Amazon]
- Spade connectors
- (2) USB-A to USB-C cable
- (1) USB-A to USB-B cable for charging
- USB-C breakout – horizontal
- Qwiic connector
- Zip-ties
Headers/Breadboard
- Straight, male, single-row headers
- Straight, male, long-centered, single-row headers
- Straight, female, single-row headers
- (2) Screw terminals, 6-pin
- (2) Screw terminals, 16-pin
- (2) Screw terminals, 2-pin
- Solderable breadboard
Buttons, Switches, External Connectors
- Bulkhead 3.5mm connector
- Bulkhead USB-B/USB-A connector
- Toggle Switch & Cover
- 10k potentiometer
- (8) White arcade buttons
- (5) Black arcade buttons
- (2) Yellow arcade buttons
- (2) Green arcade buttons
- (2) Blue arcade buttons
- (1) SPST momentary button with LED