I’ve been doing some experiments with using the Arduino Nano as basis for a little banana sequencer, which I would like to use with my 73-75 Voice. So far I figured out that the Nano’s digital outs can be used as triggers and the PWM outputs (with some limitations) for CV. But before doing some further experiments or even moving beyond the breadboard, there are some basic (electronics beginner’s) questions that maybe some of you can help me with:
The Arduino Nano’s maximum output voltage is 5V, so that’s safe with my Serge and probably most other banana gear. But what about the current? Could there be a scenario where a CV input will draw more current than the Arduino can provide? What would be the worst case result here and are there some simple protection techniques?
The Arduino only outputs positive voltage and I’m not going to have it receive any input from the synth (for now). However, would it still be a good idea to put something like a protective diode before the output, just to make sure nothing goes wrong when accidentaly plugging the Arduino’s/sequencer’s out into an out of the synth?
And apart from that, are there some other precautions that should be taken care of?