Here’s a small project I’ve started recently. To @recursinging’s recommendation, I’m posting it here
So, it started out as a mod for the amazing kxmx_bluemchen/kxmx_nehcmeulb module to add more knobs but drove me into expanding it more.
Margarita Prototype is originally a rework of the kxmx_bluemchen and kxmx_nehcmeulb. Based on a Daisy Seed.
It accommodates 7 knobs with CV attenuation, 2 gates-in and the original features, except the OLED screen and the push encoder which will feature on the expander alongside more knobs and CV with attenuation and some more. Speaks Eurorack. UNTESTED.
Motivations: learning electronics and MCU programming so i can make weird music.
Making this stuff affordable; I’m trying to use JLCPCB’s Basic Parts when possible (of course, that doesn’t include ICs) to maintain the price to a minium.
This is a work in progress. It started out as a quick mod from kxmx’s design but it triggered a cascade of ideas that will have me squeeze the nectar out of the Daisy Seed to get basically as many controls and ins and outs as possible from this cute little board.
This version doesn’t have yet any headers for the expander but I plan on replacing the 7th knob (ADC11) with a header linked to a muxed array of knobs.
This is my first ever PCB design but I’ve already learning quite a lot in the process. I’m open to any criticism and ideas regarding layout, features, PCB design, etc, etc… BTW I didn’t manage to find stackable female headers 3D model and part on easyEDA so it’s just warned in all caps on the schematics until I figure that out.
Expander: so I’ve been planning the expander to have several knobs via a multiplexer as mentioned above but I’m also interested in getting a PCM3060 codec, divide its clock and get many i/o (ie: 2 outs at 192kHz would give 8 outs at 48kHz, in theory).
I haven’t done the panel yet. But it’ll be done soon-ish. It’s meant to be 12HP.
Firmware-wise, I’ll wait til I receive and test it. Hopefully this will evolve into a solid prototyping platform!
Kudos to @recursinging for the inspiration, motivation and the beautiful open source modules!