VOX gets triggered when iPhone is charging

johnboiles / BaofengUV5R-TRRS

Tiny board that allows you to connect the Baofeng UV5R radio to a smartphone or other device that uses a TRRS connector for audio.

Other

375 stars 44 forks source link

Open johnboiles opened 10 years ago

johnboiles commented 10 years ago

This is probably because noise from the charging circuit comes through on the UV5R's microphone line since the microphone line is not connected.

Possibly bringing back the diode could help this, but was a hack all along, so I'm hesitant to re-add that.

A fully opto-isolated solution would definitely fix the problem, but that'd make for a much bigger board.

If anyone has any better ideas, I'd love to hear them.

johnboiles commented 10 years ago

Note that this doesn't always seem to happen. Sometimes I can charge and use the cable just fine.