Connect a 0.01µF (10nF) ceramic capacitor from the Dit, Dah, and Command lines directly to Ground. The internal Arduino pull-up resistors are enabled in software, so no external pull-up resistors are required. 3. Speed Potentiometer Hardware: A 10k-ohm linear potentiometer.
Directly connecting an Arduino pin to a vintage or even modern transceiver can destroy the microcontroller due to high voltages or reverse currents. This repack utilizes optocouplers for total electrical isolation. k3ng keyer schematic repack
Before we dive into the schematic repack, it's essential to understand the K3NG keyer's architecture and functionality. The K3NG keyer is an electronic device that allows amateur radio operators to send Morse code via a radio transmitter. The keyer consists of a microcontroller, a keying circuit, and an interface for connecting to a radio transmitter. Connect a 0
: If implementing a Push-To-Talk (PTT) delay line, duplicate this identical optocoupler sub-circuit on a secondary digital pin to handle manual amplifier switching. A CW keyer based on the K3NG and K5BCQ work - GitHub Speed Potentiometer Hardware: A 10k-ohm linear potentiometer