VCO

Version 0.4 from September 2020

VCO that I pulled together for my drum machine project. It’s based on a former standalone version and now migrated to Eurorack format since I decided to go into this direction.

Features

• ✅ Square, triangle and sine wave
• ✅ Variable frequency range (30 Hz to 13 kHz)
• ✅ CV input with variable attenuation
• ✅ Variable DC

Details

I found a thankful way to assemble the stripboard and the front panel by using the interface components, like the potis and audio jacks (Doepfer style).

Links

• Video Demo
• Schematic (PDF) – Please don’t mind that the circuitry index (e.g. “Input adjust”) components index (e.g. “R3”) start with numbers higher than 1. This due to the fact that I removed the integrated power supply unit from the former standalone version.
• Stripboard Layout (PDF)
• Front Panel (PDF)

Improvement Potential

See the comments on Instagram and Reddit.