- http://www.cgs.synth.net/modules/
- http://urekarm.tripod.com/synth/download.html
- http://www.till.com/arptech/modmain.htm
- https://aisynthesis.com/
- http://www.bartonmusicalcircuits.com/synthstuff.html
- https://noisereap.com/diy-archive/
- https://github.com/bastl-instruments/eurorack
- https://github.com/bastl-instruments/bastlSchematics
- https://github.com/pichenettes/eurorack
- https://github.com/dzlonline/the_synth
- https://github.com/sensorium/Mozzi
- https://github.com/maltman23/ArduTouch
- https://github.com/MeeBlip/meeblip-anode
- https://github.com/MeeBlip/meeblip-triode
- https://github.com/hughpyle/directsynth
- https://github.com/trash80/Ym2149Synth
- https://github.com/Ixox/preenfm2
- https://github.com/miya4649/synth_riscv
- https://github.com/dzlonline/the_synth
- https://github.com/russellmcc/dco
- Make: Analog Synthesizers
- Read the book cover to cover, but skip the kit. It’s difficult to troubleshoot with lots of messy hand wiring.
- Maplin: Audio IC Projects
- Maplin: Music Projects