Eurorack 3U

From the manufacturer: This is a somewhat lazy design, but a nice easy build.. Basically grabbed the classic Jacky/Kirschman 555 ADSR circuit from 1980 and replaced the pots for Attack, Decay and...

This Envelope Follower PCB was developed for use in the cellF synth, it is based on the design in the Buchla Easel. Obviously it has a few changes; a gain pot rather than a hi/lo switch and a gate...

Doof is a drum module. The design is typical of early 80s drum modules, best to look at the schematic to grok it. In this design, the VCO is a trimmed down version from the NLC dual OTA VCO and the...

From the manufacturer: This is an upgrade for the NLC thru-hole dual LFO and the thru-hole dual VCO. The circuit is based on the thru-hole dual VCO but can be switched to operate in 3 ranges;...

The NLC Triple Sloths contains 3 Sloth chaos circuits. Each one runs at a different rate; Torpor takes approx. 15-30 seconds to travel around 2 strange attractors, Apathy takes 60-90 seconds and...

NLC Dual VCO NLC's Dual OTA VCO is a dual tri-core VCO. Quite simple design, not great tracking or stability but decent enough and very usable.

From the manufacturer: This module is a voltage controlled PT2399 delay with sync out. The sync is fed to a clock divider and divided down 12 times to 1/4096. There is also a switch to run the clock...