M17-Project/Module_17

Low decoded audio volume in rev 0.1e

Closed this issue · 5 comments

After changing the value of the volume potentiometer from 50k to 10k, the signal at the audio amplifier's input decreased in amplitude.

Workaround: solder a 2k resistor across R31 (22k) to increase amplifier's gain.

Fixed.

updated BOM to include changes in commit a85bac8

Workaround: solder a 2k resistor across R31 (22k) to increase amplifier's gain.

Could we get instructions for this workaround? The board I just received from Lilygo has low audio output and I don't even know where to find R31.

I believe it's this one, should have 223 written on it.
obraz

Thanks, the one on my board has "182" which seems correct.