Luke is a model tank enthusiast and wanted to come up with an inexpensive, open source, high quality sound source project for RC models. After going through the audio tutorial workshop he got started on the project.
The project uses a Teensy 3.2 plugged in to a carrier board. The Teensy does the processing the carrier board provides an amplifier, low-dropout regulator (LDO), SD card socket, and connections for a speaker, volume and other things needed for RC models. There are 5 RC inputs on the board that allow for control of the engine and some other auxiliary sounds.Luke detailed much of the development process on the Open Panzer forum.
Curtis Olson has developed a low cost DIY autopilot system that supports the AuraUAS autopilot flight code and firmware.
This version of the hardware is the latest in his continuing evolution of a DIY autopilot system. Each version has had improvements in both performance and features. In the latest version Curtis switched to using KiCad for the PCB layout to gain more flexibility in ordering PCBs.
The basic design of the system uses a “little” (Teensy 3.2) and “big” (PocketBeagle) working together as a distributed system. The Teensy handles all the hard real time sensor I/O tasks while the PocketBeagle does the heavy lifting – control, navigation, logging, etc.
Be sure to check out the Github page for the project for more details as well as code, PCBs files, and build instructions.
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:
Gyro Color – Rotating sphere will change color of all LEDs
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.
Sound Meter – All LEDs (Great next to a Blue Tooth Speaker!!)
Sound Meter – Single VU Meter with 130 LEDs spiraling down
Dot Snakes Sound – 4 snakes run around sphere and change speed with sound
Dot on Top – Gyro keeps color dot on top of the sphere when sphere rolled on floor
Colorwash – Beautiful effect of all colors cycled through on sphere
Dot Snakes – 4 snakes run around sphere at constant speed
Gyrosnake – Sound changes color as LEDs spiral downward
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.
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
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.
Rob Reynolds over at SparkFun whipped up some singing skulls just in time for Halloween.
Inspired by a recent trip to Disney World and seeing animatronic magic, Rob grabbed a Teensy 3.6, an audio shield, and some plastic skulls and got to making. He created 4 solenoid circuits using mosfets to trigger the singing skulls. To top it all off, googly eyes were added to the skulls, because googly eyes make everything better.