I want to power my up2stream mini v4 via usb (mainly cause I use as input source the usb dac only). This works in general (I get wifi, analog ouput works fine).
But when connecting the spdif-out board, I don’t get a signal. The red led of the optical connector remains off.
When I connect the mini v4 to a 5V power supply, the spdif-output works.
Do you know a workaround so that I could use the spdif-out board when the mini v4 is powered via usb?