ProtoDAC TDA1387 X8 project

[OnkelPH]

Hi

Been working on some 5v lately, without any issues. Tried a lifePO4 with a LT1963 module, but that made a lot of noise. Sounded like an old radio….. also tried to bypass the Q7 with 5v from tip, also noisy.
What can it be that causes the noise? I’ve tried both 5v between the outputs and GPIO.
Still learning and won’t give up…

Sent a PM. Rather than go back and forth troubleshooting here. Usually problems in both channels, sounds like AM radio, etc are due to I2S problems. Bad solder joints to GPIO pins 12, 35, 40, resistors R1-R3 or module pins 1-3.

Thanks. I meant to say that the ProtoDAC on the rpi works fine. There’s no issue there. I do think there’s an issue with the psu. I’ll go over the solder joints.