Hi ! I've just finished my pico with new tx capability. I choosed the polar option with internal nco just to keep it simple. It works, except microphone. I use an MAX4466 just like the project, but I noticed that the active mike wire is connected to pico AGND, so the mike is short circuited. Is it a mistake? Thanks, tx functionality seems very promising. Bye!

[Tonytti]

[dawsonjon]

Hi,
Yes, that's a mistake. Mic should be on the spare ADC input, pin 34 I think.
Cheers
Jon

[Tonytti]

Ok it works. Max4466 has too much gain, i think just an electret mic will be ok. I'm investigating, but it's a minor issue. Great project!