Audio Electronics

CD4049 pre-amp, tuned to work particularly well with DIY contact microphones (but would still boost most signals effectively).

A collection of original designs of audio power amplifier released under BSD License.

Collected Gerber files for PCB manufacture of Peter Blasser/Ciat Lonbarde's Paper Circuits.

An optical tremolo, for DIY vactrols, modelled after circuits in Nicolas Collins' 'Handmade Electronic Music'.