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This is my CD4069ube based Twin T kick drum module for my modular synth.
I fixed a couple of things from the schematic in the link below! I forgot a 10uF capacitor in the diode clipping circuit and forgot to mark the value of the capacitor of the power input.
The 0.22uF capacitor doest have to be polarised! For some reason I only had electrolytic 0.22uFs at hand at the time and I drew the cap like that in the schematic to see the polarity if needed. So you should be fine using any type of cap!
Here’s a link to the schematic in high quality: www.dropbox.co...
The circuit is based on Elliot Williams' Logic Noise articles on Hackaday. Here is the drum article: hackaday.com/2...
The circuit is also compatible with eurorack systems. My modular works on + and - 12V but using banana cables.
Thanks bye!
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