Transmitters often carry high voltages or negative voltages on the key line that will instantly destroy your microcontroller.
Connect Pin 2 (Cathode) of the optocoupler to Arduino Ground.
While the software handles most debouncing, some schematics include small 0.01µF capacitors across the paddle lines to filter out RF interference. 4. Audio Sidetone k3ng keyer schematic
Ham shacks are full of Radio Frequency Interference. Wrap your hookup wires around small ferrite toroids, keep lead lengths short, and use bypass capacitors on all input lines.
Which features (e.g., LCD, Keypad) are essential for you? What type of transceiver you are keying? I can give you a more specific wiring diagram! Share public link Transmitters often carry high voltages or negative voltages
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.
Building one starts with understanding the . Whether you are building it on a breadboard or a custom PCB, 1. The Brain: Arduino Nano or Uno Which features (e
The represents one of the most flexible and feature-rich open-source CW (Morse Code) keyer designs available to the amateur radio community . Developed by Anthony Good (K3NG), this Arduino-based project rivals high-end commercial keyers by offering extensive customization through a modular code structure. Core Schematic Components
Because the code runs on an Arduino, the schematic is simply the wiring map to unlock these features. You can build a minimal keyer with three wires, or a deluxe command station with 40 components. The schematic scales with you.