Connect Arduino pin D13 (TX Key line) to a 220-ohm current-limiting resistor, then to Pin 1 (Anode) of the optoisolator. Connect Pin 2 (Cathode) to Arduino GND .
Once tested, build on a PCB, stripboard, or inside an enclosure. 5. Advanced Features & Upgrades k3ng keyer schematic repack
A clean schematic repack divides the K3NG keyer into five functional blocks. Here is how to wire each section. 1. The Microcontroller (Arduino Nano) Connect Arduino pin D13 (TX Key line) to
Uncomment #define FEATURE_WINKEYER to allow software like N1MM or HRD to control your keyer over USB. build on a PCB