TAG: eurorack

808K - An eurorack version of the TR-808 kickdrum

The assembled 808K module
More than one year ago I decided to build a TR-808 kickdrum clone using Eric Archer's build documentation, and the first version I put together was done on a perfboard. It took quite a while, but thanks to a wiring pen and some patience, it was finally working.
While building this version, I also found a couple of interesting mods: a decay range extension and a "pitch" pot, which I decided to integrate into the prototype.

After some months, I started experimenting with Eagle, and created the first prototype of a PCB. Back then I didn't have a modular synthesizer (lucky times!), so I ended up using an Arduino together with an optocoupler to trigger the kickdrum via MIDI: it worked quite well, and I've been using it for a while, until I started building my first Eurorack modules.
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Synapse - A DIY-friendly CV I/O shield for Arduino

Some Synapse pcbs

Synapse is a simple, diy-friendly Arduino shield that will allow you to expand your modular synthesizer in new and creative ways. Here's the hardware features:

  • 2 x control voltage inputs, 0 to 5V with diode protection
  • 2 x control voltage outputs, individually configurable as 0 to 10V or -5 to 5V via software, with 12bit of resolution
  • 2 x gate inputs
  • 2 x gate outputs
  • 1 x eurorack power connector (10 pin)

Please refer to the github repository for the latest version of the schematic, the BOM and the library. Please note that for the time being I'm not selling kits or pcbs, you'll have to order the pcbs yourself and source all the parts (see the links and infos below).

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