Lil' Erebus
From Hackerspace.gr
Lil' Erebus is a paraphonic synthesizer Eurorack module DIY kit by Dreadbox. The desktop version includes the synth, and an Eurorack power supply board.
Documentation
Schematic (for debugging purposes)
Using the Lil' Erebus
- Connect to a sequencer/DAW using your preferred method (CV/Gate or MIDI using the DIN5 to 3.5mm adapter)
- Connect a 15VDC center positive power supply to the synth (IMPORTANT: check polarity and voltage using multimeter if not sure)
- Connect your speakers/headphones to the OUT jack on the ECHO/AMP section of the synth
- An infinite note will probably play, use that to tune the synth with the TUNE knob and a guitar tuner
- Program your sequence and start the sequencer. The synth should play what you've told it to.
Troubleshooting
- No sound
Check:
- Pin 4 of IC5 (ATMega328). You should see a pulse each time the synth gets triggered by MIDI
- All outputs of IC10, IC21, IC7, IC26 and IC2. You should see a waveform consistent with your VCO levels (LVL1 for sawtooth and LVL2 for pulsewave)
- No power
Check diode on power supply board. Be careful-er with voltage and polarity.
