Sundial Custom Keyboard

Jesse Robinson created his own custom keyboard inspired by the Sun Type 6 keyboard.

Jesse wanted a keyboard that had the vast functions of the Sun and IBM keyboards and also had a number pad reversed to lay out like a telephone number pad.  The build process included fabricating a custom frame and hand wiring all 136 mechanical switches for the keys.

Getting the Teensy ++ to fit inside the slim case required using right angle header pins.

Additional photos of the build process can be found here.

Code as well case build files and wiring diagrams can be found on the project page.

DIY Audio Sampler

HomeMadeGarbage put together a DIY audio sampler.

This sampler project was put together using the Teensy audio library and the audio library design tool.   For this project six short sounds are played from memory.

You can see a short clip of the sampler in action here

#teensy audio board でサンプラー自作 #slipknot

A post shared by Home Made Garbage (@homemadegarbage) on

Code for the project can be found on this page.


Soft MIDI Pedals

Daren Schwenke is making his own MIDI pedals by fabricating his own custom pressure sensors measured by varying capacitance!

Daren’s old MIDI pedals were wearing out, so he decided to make new ones to replace them.  He made is own foot sensor by making a capacitor out of 2 pieces of foil with mylar between them.

Current code for the project is available on GitHub.

LED Top Hat

Chris Faye made an awesome LED top hat.

The hat uses an 8×32 LED matrix in 4 sections that run in parallel using the FastLED library.  While battery life does depend on the brightness of the LEDS, Chris did wear the hat and had it running for about 5 – 6 hours at the Edwardian Ball without needing to change the batteries.

There is some good discussion on this forum thread about trouble shooting some issues where the LEDs were dramatically slowing down after about a minute.

Code for the project has been published on GitHub.

Euroshield by 1010Music

The folks at 1010Music have released the Euroshield, a Eurorack and audio interface for Teensy.

Euroshield allows users to customize their own synthesizer module.  It uses the standard Eurorack power systems as well as standard patch cords for input and output of standard Eurorack level audio, CV and MIDI signals.

A few of the features include:

  • Two audio inputs and outputs using the Eurorack -5V to +5V standard
  • DC coupling allows audio ins and outs to be used as control voltage connections
  • MIDI input and output via 3.5mm TRS minijacks
  • Board design allows mounting in Eurorack while exposing the Teensy
  • Built-in controls enable users to create a fully functioning product:
    • Two knobs
    • One push button
    • 4LEDs
  • 10 demo Sketches include sample code for filtering, reverb, and VCO.

SparkFun AVC Rover

Jesse Brockmann built an autonomous rover for the SparkFun AVC where’s he’s competed for the last 4 years, winning in 2016 and 2017.

Jesse started working on his first rover in 2011 and finished it in 2014 to compete in the SparkFun Autonomous Vehicle Competition.  He offers some great advise for people helping to build their own.  He says the most important parts are the brains, his uses a Teensy 3.5, the Inertial Measurement Unit (IMU), and the RPM sensor.  Another important consideration is the base platform.  Jesse uses a 4×4 platform with a low center of gravity.

You can get more information on builing your own rover an the DIYRovers Google Group Forum.