Made 2 pcbs smd and dip version for the Cw Decoder ATS-25
all caps and resistors are 0805 smd size. only inductor and tantal 1206
You need a buck convertor from 3.7V to 5V for the ATS-25 or the second pcb with convertor, see below
!!! There was a fault in the orginal diagram, Cap 10uF the + between Pin 1 and 8 LM386 was wrong, see my new diagram !!!
Diagram 1
Diagram 2
Stand alone
Diagram 3
3.7V to 5Volt convertor
U1B0305S Datasheet
Gerbers smd are here:
https://github.com/RSZ-Nld/Cw-Decoder/blob/main/Gerbers-3.zip
Gerbers smd with Conversion on board:
https://github.com/RSZ-Nld/Cw-Decoder/blob/main/Gerbers-V1.3.zip
Gerbers Dip Version here:
https://github.com/RSZ-Nld/Cw-Decoder/blob/main/Gerbers-Dip.zip
Gerbers Dip Version with conv on board:
https://github.com/RSZ-Nld/Cw-Decoder/blob/main/Gerbers-Dip-Conv.zip