Teensy CV input and output for eurorack modular synths.

[warpigs330]

So I have been working on getting the teensy interfaced with my modular synthesizer and made a video on the circuits that I used in this instance. There is so much fun to be had making your own modulations. I also include a script that allows you to record and loop a cv input to make your own LFO. If you have any questions feel free to ask.


https://www.youtube.com/watch?v=mrvg...ature=youtu.be

[fdaniels]

You are using a simple Voltage divider for your -5V Offset Voltage, so every Noise on the negative Rail will bleed into your Circuit. How accurate are your A/D readings then?

[warpigs330]

I haven't tried connecting it to a pitch CV, and I don't have an oscilloscope, but the input is certainly stable enough to prototype ideas with. I find the input to drift +-4 values of the 12 bit input. This is also largely dependent on your power supply, I am using a 4ms Row Power 40. It was certainly stable enough for me to start trying things.