Music Thing Modilar Turing Machine random looping sequencer, it’s a circuit that produces clocked randomly changing control voltages. PCBs are housed behind Grayscale panel. This is an open hardware projec.   http://musicthing.co.uk

Unique sounding hihat/voltage controlled noise source   http://cv.hexinverter.net

A single-channel audio vca module based on the famous that2180 chip

Control voltage processor

A version of the Buchla Low Pass Gate   http://www.clsound.com/

Music Thing Modular Spring Reverb, with Accutronics digital reverb module This is an open hardware project.   http://musicthing.co.uk/

Linear VCA with extras