if (dot_time < 20ms) flag_invalid_short(); if (dash_time < dot_time) flag_dash_shorter_than_dot(); if (key_down_time > 5s) flag_stuck_key();
Building your own keyer from a schematic is a rewarding DIY project that results in a piece of gear perfectly tailored to your operating style. By understanding the schematic's blocks and carefully following build instructions, you can successfully construct a versatile K3NG keyer for your station.
Whether you are building a basic keyer for the shack or a full-featured contest powerhouse, understanding the schematic is your first step. This guide breaks down the essential hardware sections of the K3NG keyer schematic. Core Component: The Arduino Microcontroller k3ng keyer schematic
The K3NG keyer schematic is not a fixed design but a flexible framework. It can be as simple as a few resistors and an Arduino Nano, or as complex as a fully‑featured keyer with a keyboard, LCD, rotary encoder, and multiple memories. By understanding the blocks we have discussed – microcontroller, power, inputs, outputs, and peripherals – you can read any K3NG‑derived schematic and build a keyer that perfectly matches your operating style.
For a basic, functional keyer, you only need a handful of components. The following is a breakdown of the essential connections: The center of the circuit. Paddle Connector (Stereo 3.5mm Jack): Tip: Paddle Right →right arrow Digital Pin (e.g., D2) Ring: Paddle Left →right arrow Digital Pin (e.g., D5) Sleeve: Ground Keyer Output (Mono 3.5mm Jack): This guide breaks down the essential hardware sections
For total electrical isolation between your computer/Arduino and your rig, use a :
No major changes to the original k3ng hardware required – just 4 extra wires and a small firmware update. By understanding the blocks we have discussed –
A momentary switch connected to a digital pin allows you to enter "Command Mode" to change settings via Morse code.
: Connects to Digital Pin 3 (standard configuration).
(pseudo-code):