It’s based around a Teensy 3.2 and an Audio Adaptor. The synth is controlled by two illuminated rotary encoders and data is displayed on a 0.96″ OLED.
This nifty little synthesizer has three oscillators with six waveforms, white noise generator, glide, resonant low-, band- and highpass filter, a mixer section, four LFO’s and four envelope generators and 100 preprogrammed presets. Each section (pitch, pulsewidth, filter frequency and amplifier) can be modulated by an envelope or an LFO.
Haven opened up hi controller, removed the accessory port mechanism, and found there was just enough space to fit a Teensy-LC. He then hacked up an old USB phone cable that matched the controller and wired it up to the Teensy. Then he connected the controller to the Teensy along with a couple of 4.7k pull-up resistors for the I2C pins. The code for the project can be found on GitHub.
Forum user sevEnil2 (Severin N), together with his brother, built an LED table with bubble wall. Not only does this table feature LEDs wtih and infinity mirror, it also has aquarium tanks on all 4 sides. The use of the CD drive to house the controls is one of the many cool features of this project.
The pair undertook the project to learn about micro controller programming, woodworking, and custom tank making. They found a lot of help with their projects from on-line communities. You can follow the discussions about the development on this forum thread and this one well. There is also this Google + conversation to check out.
After searching for an electronic door lock, and not being satisfied by what he found, Elmue decided to build his own. The design features a powerful battery back up, an easy to use interface, the ability to store up to 64 users, and it mounts inside the door so it’s not visible from outside or exposed to the elements.