LED Gyro Sphere

NZDoug made a cool interactive LED sphere using gyro and sound sensors.

This nifty LED sphere has multiple sensors to make it interactive.  It features a gyro board and audio mice controlling 130 addressable LEDs.  The project uses takes advantage of the processing power and memory of the Teensy 3.6.

There are menu buttons on the sphere used to select up to 9 different effects:

  1. Gyro Color – Rotating sphere will change color of all LEDs
  2. Gyro Puzzle – Three Bands of color set by X, Y, Z axis control of the Gyro. The objective is to rotate the ball until all bands are the same color.
  3. Sound Meter – All LEDs (Great next to a Blue Tooth Speaker!!)
  4. Sound Meter – Single VU Meter with 130 LEDs spiraling down
  5. Dot Snakes Sound – 4 snakes run around sphere and change speed with sound
  6. Dot on Top – Gyro keeps color dot on top of the sphere when sphere rolled on floor
  7. Colorwash – Beautiful effect of all colors cycled through on sphere
  8. Dot Snakes – 4 snakes run around sphere at constant speed
  9. Gyrosnake – Sound changes color as LEDs spiral downward

Code, schematics, and build details are available both on the Hackster.io project page and Instructables

Notes and Volts Teensy-Synth

Dave over at Notes and Volts has published a great series of DIY tutorials called Teensy-Synth.

In the first episode Dave walks you through assembling your Teensy and Audio shield and how to use the audio library.  He also makes code available to help you get going.

The next 7 episodes progress to controlling your synth with Pure Data software, connecting a USB-MIDI keyboard, code optimization, adding an ADSR envelope generator, adding waveforms, filters, pitch blending, and more.

If you want to get started building your own synth, this series is a great place to start.





Burning Man Art – Flaming Palm Trees

Monica Houston built these awesome flaming LED palm trees for her camp at Burning Man.

This was Monica’s first fire art project.  Her motivation for the project was to impress her friends and having something fun to take to festivals and parties.  It was important that it be interactive so a control panel was made to allow people to generate poofs of flame.

Two controllers are used.  A Teensy 2.0 controls the propane valves and sends messages to a Teensy 3.2 animating 1200 LEDs in sync with the flames.  Complete source code is available on github.

Check out this album for more photos and videos of the project





Moon Germs Hand Held Synth

Kenneth Marut made a very cool, battery powered, hand held, digital synthesizer – Moon Germs.

This compact synth uses a combination of buttons and triggers to produce different waveforms and effects. An 8×8 LED matrix shows information while use.  It also uses an IR proximity sensor to modulate frequency.  In recent updates to the project he synth engine was restructured to include a Low Pass Filter and Low Frequency Oscillator (LFO).

As a lifelong musician Kenneth wanted to explore digital synthesis and experiment with unique ways of interacting with a synth using minimal buttons and knobs.  He hadn’t really explored digital synthesis before and decided dive in using a Teensy 3.2 and audio shield.

Be sure to check out the HackaDay project page, it has a lot of great information.

Code for the project is available on GitHub