I have an SPDIF bracket from a PC, with optical and coaxial connectors.
I’m tempted to try it on the Vim, but due to very different capacitor and resistor values, worried about potential for damage to the Vim.
For COAX, I assume only ground and signal(GPIO Pin 13) will be needed, as 5volt(VCC) only for optical.
But need to know if TTL(5v)or non-TTL voltage used.
I will wait for your research.
If successful, will add to my "Fun Things…"post. 