README.md
eurorack digital audio-module prototyping dev-kit ]]>]]>

(work in progress) open source hardware and software for a ~~]]>teensy 3.6]]>~~ eurorack shield (working on updating to ]]>teensy 4]]> )


what is it
software
support
todo
social media
videos


what is it

A set of circuits and pc-board designs integrating all the components you need for prototyping a digital audio module for eurorack

audio codec circuit originally started as a discussion on quad audio channel outputs and a pcb design integrating teensy and cs42448 from Paul Stoffregen on ]]>pjrc forum]]>
* cortex m7 microcontroller (teensy 4.0) interfacing the follow components
  * audio: multi-channel audio codec ( 6-in / 8-out 24-bit sound card - ]]>CS42448]]> )
  * analog ins/outs: -10V to 10V 16bit/sample control voltage 4 x inputs and 4 x outputs ( ]]>ad7606]]>, ]]>ad5754]]> )
  * display: ST7735 128x128 16bit-color tft display
  * breakouts: - for uSD card, USB host/device, midi in/out, 2 x teensy analog in/out (0 to 3v3 w/protection)
* 20HP aluminium panel mounted for eurorack case
* write arduino compatible c/c++ firmware & program using arduino/teensyduino (]]>plus teensy audio library]]>)



software


All schematics and circuit boards designed using Autodesk Eagle cad
Autodesk Fusion 360 used for mechanical layout
My free license to autodesk fusion 360 has expired
I am planning to migrate away from proprietry software and subscription licenses


circuits and pc-boards to ]]>Kicad]]>
physical design to ]]>FreeCAD]]>
CAM using ]]>opencamlib]]>



support

This project is a work-in-progress!

What you can do if you like to see progress with this project?
* star this repository
* subscribe ]]>Nic N on youtube]]> & ]]>DIY Audio Electronics Maker]]>
* clone this repo, make improvements, commit & send pull-requests

todo


[ ] Migrate circuits and pcbs to kicad
[ ] Teensy 4.0 changes


[ ] move control-voltage adc and dacs off main-board and on to top-breakout board
[ ] reduce main board to double layer board, instead of 4-layer board
[ ] increase horizontal size from 20HP to 24HP

[ ] Breakout board for rotary encoders and pots


[x] ~~Order~~
[ ] Assemble
[ ] Certify

[ ] ~~change all 0603 resistors and caps with 0805~~
[ ] Adapt mainboard with fpc connector from new breakout board
[x] ~~Include schematics and board for uSD adapter~~
[x] ~~Isolate analog grounds~~
[ ] Vertical alignment of FPC connectors between top breakout and mainboard
[ ] Finalize circuits / boards
[ ] Testing


[x] ~~CS42448 audio codec~~
[x] ~~control voltage input~~
[x] ~~control voltage output~~
[ ] usb host/device
[ ] midi in/out
[ ] sd card extension & adapter

[ ] Document


[ ] order & build process
[ ] software process

[ ] Firmware


[ ] Sliced audio loops
[ ] Midi looping



social media


facebook:


]]>Moolet]]>

youtube:


]]>Nic N]]>
]]>DIY Audio Electronics Maker]]>



videos

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