Hi there! I am working on a concept for a DIY device: a little box you plug into your norns via usb and then send midi from norns to that box which will then send it out via CV. (And hopefully there is a switch which changes directions and you input CV and send it as midi over usb to the norns - don’t know if this is possible, yet). So, basically an extension for norns to interact with CV.
I have made first tests and still looking for the right hardware controller, but it seems possible so far.
I just wanted check if anyone would be interested in such a device and hear if you have any ideas, dreams, wishes what such a device could/would do. Would be nice to hear you thoughts on this matter. (And let me know if such a device already exists and I am wasting my time…)
(I know there is crow from monome but it has been out of stock for so long and if it comes back I guess it will be sold out as fast as the latest norns batch. Also it is a rack module and I like to have something mobile. And last but not least I want a cheap (<70$) DIY solution and the challenge to develop such a device.)
[work in progress]
Thanks everyone for sharing! There are some interesting projects you all posted worth digging into further in the future.
I was able to build a first version: I am using an Arduino Micro since it is very easy to set up as an USB-MIDI device that is recognized by Norns. Added 6 CV Outputs and wrote a little script for Norns and it is working pretty well. Since I am not interested in sending classical MIDI signals (like “clock”, “note”,…) it is already pretty much what I wanted to achieve. It is outputting only 0-5V (5V is the voltage Arduino Micro is operating on). At this moment this is sufficient for me. But I guess one could with additional circuitry change that output voltage to 8-10V and if needed to negative voltage also. I keep testing for a while to check if it is working properly and if I need some more options or not. (Will be posting source code and stuff when I am finished)
It is already a great joy to control my Strega with this via Norns and do all kinda crazy noise stuff
almost there. Already working. Made a script that adds six lfos for each CV out. Thinking about adding CV IN too. money wise I have spent about 25$ on the parts. adding CV in would put another ~10 on top I guess. Still needs a good case. Current box it is sitting in is too small.
Finally managed to find a way to add CV In (0-12V, via a voltage divider circuit). It now has 6 in and 6 out slots. Case is still a work in progress. I’m thinking about making a version with 12 CV Outs, because I always end up having not enough CV outputs…
Here is a little demo with Rings and Beads:
Finally got a proper case for it! Temporary name for it is “CIVO”. (combining letters from CV and I/O)
Finished a eurorack version with 0-10V output. It’s still PWM though and thinking about redesigning the outputs to be true analog. meanwhile I am working on a PDF that explains how all this is done for those who are interested.
(CIVO is the device on the right)
Output is true analog now (added DACs). Have to rewrite code. Still needs some time. And need to think on how to continue with this project…