Aug. 2, 2014

Check out Adafruit's latest project: Mini OONTZ, a 16 button MIDI drum machine. OONTZ is the open source button grid controller based on the Adafruit Trellis button platform.

The mini OONTZ is a 3d printed case housing one trellis and 4 potentiometers ideal for a 16 button drum pad. In this project Adafruit has built a diy midi controller that works with ios devices and analog synths.

OONTZ works with any MIDI software and hardware. No more virtual midi or serial to MIDI stuff, oontz is legit USB MIDI.

To build the mini OONTZ, you need the following parts:

  • 1 4x4 Adafruit Trellis Monochrome Driver
  • 1 Silicone Elastomer 4x4 button keypad
  • 1 Arduino Leonardo
  • 4 10k Potentiometers

The potentiometer knobs can be 3D Printed or get some nice ones on the internets. Adafruit published the design of the Mini OONTZ enclosure here so you can download and print your own. For really great quality prints, Adafruit recommends using PLA over ABS.

This 4 piece design houses the components and keeps them secured with machine screws. The Arduino Leonardo is mounted to the bottom cover with 4 screws. 4 potentiometers are mounted to the top panel and secured in place. The Trellis is mounted to a tray that is secured to the enclosure with another set of machine screws. A total of 14 screws makes this pretty solid and durable box.

Adafruit published the full tutorial here including BOM. You can also download .stil files on Thingiverse.


Posted in 3D Printing Applications

Maybe you also like:


Laimis wrote at 7/18/2016 12:56:17 AM:

Adafruit tutorial link is not working now. Do you have any alternative links? Or maybe you can send me the code and scheme?

Leave a comment:

Your Name:


Subscribe us to Feeds twitter facebook   

About provides the latest news about 3D printing technology and 3D printers. We are now seven years old and have around 1.5 million unique visitors per month.

News Archive