I integrated the FPAA into a 5U synth panel:
I added two CV converter boards to make use of all inputs (by converting -10V to 10V to 0 to 3V). Now I am about to wire it all up.
Still unsure what is the safest way to power it. I’ve got internal 5V, +12V and -12V rails available. I want to keep the micro USB port free to connect an optional programmer. Can I use the onboard pins for supplying power? But I can see only 5V and -5V. While I could create the -5V by myself, would it be ok if both external power and USB are connected? (with Teensy boards for example, one needs to cut a power line and add diodes to avoid issues between USB and external power)
If not, I would probably have to add a USB power splitter between the USB panel port cable and the ZRNA, so that USB power is supplied by the internal power bus, while data is coming in via the panel port cable.