Software Defined Keyer

10/22/2020

Attempts to Create a new Software-Designed-Keyer (from ~2003 or earlier) have been many.

The Various JPG are for 2 primary attempts (out of of several), where an Arduino Mega plugs in to the footprints shown.

The latest has a Logic Module that provides a Hardware Capture of either the DIT or DAH from the paddles, and presents it to the Arduino. I found that the typical latency has been ~10ms in a tight loop, which I account for. The circuit also provides a toggle of sort that alternates for Iambic.

The Logic Module shown also has a tone generator on the end.

The code is published for this current model. If you really need it, I could see if I can find the code for an earlier model (pics ) where I present much of the Code Bites in a teaching mode.

Dave - WA7RSO