"You're overthinking it," a gravelly voice rumbled from the shadows behind him.
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For a functional, basic K3NG keyer, you do not need to connect all the options. A minimum viable product (MVP) can be built on a breadboard. 1. The Brain: Arduino Board Most builders use an , Go to product viewer dialog for this item. , or Go to product viewer dialog for this item. k3ng keyer schematic
The K3NG Keyer is widely considered the ultimate open-source Arduino-based CW Morse code keyer, offering a level of customization, features, and functionality that often surpasses commercial alternatives. Created by Anthony Good (K3NG), this project provides a flexible solution for amateur radio operators looking to build a high-performance keyer.
Always include 0.1µF decoupling capacitors near the power pins of your Arduino and optocouplers to filter out high-frequency noise. "You're overthinking it," a gravelly voice rumbled from
Many radios require the key line to be shorted to ground when keyed. The K3NG schematic typically includes a jumper to select between:
Modern transceivers use low-voltage logic, but older rigs use high-voltage grid-block keying or cathode keying that will instantly destroy your Arduino. A minimum viable product (MVP) can be built on a breadboard
Enclose your completed keyer in a metal/aluminum project enclosure. RF energy from your antenna can cause the Arduino to freeze or send erratic code loops if it is unshielded.