K3ng Keyer Schematic «2025-2026»
If your rig does not have a built-in sidetone, or you want to practice offline, the K3NG code features an audio output pin.
Similarly, a rotary encoder with a built‑in push button is a popular method for adjusting speed and navigating menus. The typical schematic connects two encoder pins to digital inputs (with pull‑up resistors) and the push‑button to a third digital input. An R/C low‑pass filter (e.g., 1 kΩ and 0.1 µF) can be added to debounce the encoder outputs, though the software also provides software debouncing.
At its simplest, the K3NG keyer can be built on a breadboard with just an Arduino, a couple of resistors for the two paddles, and a few transistors for the keying output. This "core" circuit is ideal for those who just want a no-frills iambic keyer with the excellent "CMOS Super Keyer" timing.
Best for "kitchen sink" builds. It provides massive memory and dozens of I/O pins, allowing you to simultaneously run an LCD, a USB keyboard, rotary encoders, multiple keying outputs, and Ethernet. 2. The Minimalist K3NG Keyer Schematic
A 10kΩ linear potentiometer connected to an analog input (e.g., A0) for adjusting speed.
The is arguably the most versatile, feature-rich, open-source Morse code keyer project available to amateur radio operators today. Designed by Anthony Good (K3NG), this project allows hobbyists to build a sophisticated keyer using a simple Arduino board, rivaling the features of high-end commercial units.
Requires a small NPN transistor and a coupling capacitor to prevent drawing too much current from the Arduino pin. 5. Optional Features and Schematic Additions
If you choose a larger microcontroller like the Arduino Mega 2560, you can expand your schematic to include advanced peripherals. LCD / OLED Display Integration
USB interfacing with logging software via K1EL Winkeyer emulation protocol.
Elias looked at his pile of fried components. "I don't have an Arduino Nano."
A few common pitfalls and their solutions:
If your rig does not have a built-in sidetone, or you want to practice offline, the K3NG code features an audio output pin.
Similarly, a rotary encoder with a built‑in push button is a popular method for adjusting speed and navigating menus. The typical schematic connects two encoder pins to digital inputs (with pull‑up resistors) and the push‑button to a third digital input. An R/C low‑pass filter (e.g., 1 kΩ and 0.1 µF) can be added to debounce the encoder outputs, though the software also provides software debouncing.
At its simplest, the K3NG keyer can be built on a breadboard with just an Arduino, a couple of resistors for the two paddles, and a few transistors for the keying output. This "core" circuit is ideal for those who just want a no-frills iambic keyer with the excellent "CMOS Super Keyer" timing.
Best for "kitchen sink" builds. It provides massive memory and dozens of I/O pins, allowing you to simultaneously run an LCD, a USB keyboard, rotary encoders, multiple keying outputs, and Ethernet. 2. The Minimalist K3NG Keyer Schematic
A 10kΩ linear potentiometer connected to an analog input (e.g., A0) for adjusting speed.
The is arguably the most versatile, feature-rich, open-source Morse code keyer project available to amateur radio operators today. Designed by Anthony Good (K3NG), this project allows hobbyists to build a sophisticated keyer using a simple Arduino board, rivaling the features of high-end commercial units.
Requires a small NPN transistor and a coupling capacitor to prevent drawing too much current from the Arduino pin. 5. Optional Features and Schematic Additions
If you choose a larger microcontroller like the Arduino Mega 2560, you can expand your schematic to include advanced peripherals. LCD / OLED Display Integration
USB interfacing with logging software via K1EL Winkeyer emulation protocol.
Elias looked at his pile of fried components. "I don't have an Arduino Nano."
A few common pitfalls and their solutions:
