Marko Pavlin has designed a PCB for the CW keyer, he writes:
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
Project info at Mare & Gal Electronics site.