At its heart, the K3NG keyer uses an ATmega328P microcontroller (typically via an Arduino Uno, Nano, or Pro Mini) to look for grounding signals on input pins. When it detects a press, it executes precise timing loops to switch output transistors, generating perfect Morse code.
In the world of amateur radio, few open-source hardware projects have achieved the level of reverence and functionality as the . Developed by Anthony Good ( callsign K3NG ), this Arduino-based keyer is not just a simple device to send "di-dah-dit." It is a feature-packed, contest-grade CW (Continuous Wave) controller that rivals commercial keyers costing hundreds of dollars.
For high-voltage tube rigs, the schematic may include an optocoupler (e.g., 4N35) or a relay to provide absolute galvanic isolation. k3ng keyer schematic
"The K3NG Keyer," Silas said, setting his coffee down on a stack of QST magazines. "Open-source. The holy grail of the modern shack. It’s not just a schematic, kid; it’s a philosophy."
The K3NG Arduino CW Keyer, designed by Anthony Good (K3NG), is the gold standard for amateur radio operators seeking a powerful, customizable Morse code keyer. This open-source project transforms a basic Arduino development board into a feature-rich CW powerhouse that rivals commercial units costing hundreds of dollars. At its heart, the K3NG keyer uses an
Push buttons connected between Ground and designated pins to trigger contest messages (CQ, exchange, etc.).
The project, developed by Anthony Good (K3NG), has revolutionized homebrew amateur radio CW (Morse Code) keyers. It is an open-source, Arduino-based, highly versatile, and feature-rich keyer that can be customized to suit any operator—from QRP operators to dedicated contest enthusiasts. Developed by Anthony Good ( callsign K3NG ),
If you are using an Arduino Mega or a highly optimized Nano build, you can add these elements to your schematic:
Silas plugged the drive into Elias’s dusty laptop. A file folder opened, revealing a massive collection of files.
Because this device operates in close proximity to High-Frequency (HF) radio transmitters, can cause the Arduino to freeze, crash, or send random strings of dits and dahs. To bulletproof your K3NG schematic against RF: