I designed dedicated PCB for the CW keyer. The project is very similar to the version made on prototyping board.
Here are the updates:
- I added relay and optocoupler for PTT control
- The “CW melody” selection pins have three jumpers for 8 combinations
- The audio output has 1W audio amplifier and RC at the PWM output (work to do in software driver for audio generator)
- USB connector is microUSB female which can be used with any phone charger
The PCB is now a bit larger: 62x15mm.
And here is complete schematic:
The PCB was ordered. I will have first boards in few weeks.
Meanwhile, please check the operation manual:
Here is finished product:
The module works!