Analog percussive voice (20HP)
Mega Percussive Synthesizer by Thomas Henry.
My Eurorack version of Thomas Henry's Mega Percussive Synthesizer, with some very minor hardware tweaks and a custom FR-4 panel.
The first run of this PCB has a few minor issues that are easily fixed:
1. The Decay pots should have pins 2 and 3 (center and CW) tied together - there are solder bridge pads provided for this.
2. The Noise Q potentiometer has been wired in reverse, turning CW decreases (CCW increases) resonance.
3. R1, which sets the trigger threshold at the Lock switch, is mislabeled as 33K on the silkscreen (should be 3.3K but either works).
I would recommend the following mods for 12V supply or to taste: