K3ng Keyer Schematic Jun 2026

You cannot connect your Arduino directly to your rig’s key jack because the voltages could fry the microcontroller. The schematic utilizes a or an optocoupler .

K3NG Keyer is widely considered the "Swiss Army Knife" of Morse code keyers due to its open-source, Arduino-based design that offers a vast array of features. For many amateur radio enthusiasts, the project serves as a gateway into both microcontroller programming and advanced CW (Continuous Wave) operation. Core Schematic Components k3ng keyer schematic

You cannot connect your Arduino directly to your rig’s key jack because the voltages could fry the microcontroller. The schematic utilizes a or an optocoupler .

K3NG Keyer is widely considered the "Swiss Army Knife" of Morse code keyers due to its open-source, Arduino-based design that offers a vast array of features. For many amateur radio enthusiasts, the project serves as a gateway into both microcontroller programming and advanced CW (Continuous Wave) operation. Core Schematic Components