K3ng Keyer Schematic Repack _best_ -

The keyer uses the Arduino’s internal pull-up resistors, but for high-RF environments (common in ham shacks), adding external 0.01µF capacitors from the Dit and Dah lines to ground is highly recommended to prevent "ghost" keying. B. The Keying Circuit (Optoisolator vs. Transistor)

Ensure your keying line is well-shielded to prevent RF from the transmitter from resetting the Arduino. Conclusion k3ng keyer schematic repack

For those interested in learning more about the K3NG keyer and schematic repack, we recommend the following resources: The keyer uses the Arduino’s internal pull-up resistors,