Lee is a DJ on the weekends at a large club, and by day repairs Technics and Pioneer gear. The challenge of retrofitting a dead Pioneer CD Deck was right up his alley. He published a great 7 part video series on the process. You can find the videos here on his You Tube channel.
elkayem has made a custom MIDI to control voltage converter (in a nifty 3-D printed case) that works as an interface between a computer (or iPad) and an analog synthesizer.
It’s a multi-channel USB MIDI to CV converter based on the Teensy 2.0, the perfect interface between your computer or iPad and an analog synthesizer. It can independently drive up to three oscillators with 1V/octave CV inputs.
This device has the following features:
Three channel Note CV output (88 keys, 1V/octave, MIDI channels 1-3) using a 12-bit DAC
Configurable note priority for each channel (Top Note, Bottom Note, or Last Note Priority)
5V Gate/Trigger outputs, where each channel can be independently configured to either output a gate (output high for entire length of time that note is on) or trigger (20 msec pulse each time a new note is initiated)
Velocity CV output (0 to 4V) for each channel
Pitch Bend CV output (0.5 +/- 0.5V), which can be configured for channel 1, 2, or 3
Control Change CV output (0 to 4V), which can be configured for channel 1, 2, or 3
OLED user interface, used for setting parameters and saving to EEPROM
Project files as well as detailed project build information can be found on this GitHub page.
After the iPhone was dropped in a sink an attempt was made to dry it out in a bag of rice. The results weren’t great so plan b was to dry it out with a food dehydrator. Because the dehydrator gets too hot for the iPhone, a Teensy-LC was hooked up to a relay connected to the dehydrator to turn it on for 5 minutes and off for 15 minutes for a total of about 3 hours. The end result – a working iPhone.