The Shield

On the STM32F7-Discovery there are a ARDUINO interface so i did make a little PCB to make the connections to the keyer.

/sites/default/files/stm32shield.pdf

The diagram it self looks like this : /sites/default/files/Schematic.pdf

As you can see the paddles go in on pin D7 and pin D8

I have a buzzer out on pin D2

The radio are keyede from pin D4 via the normal way with a 2n2222 ...