Place your repacked board in an aluminum enclosure. Morse keyers are notoriously sensitive to RFI (Radio Frequency Interference).
For further help, the Radio Artisan Groups.io is the primary hub for troubleshooting and community-shared schematic variants.
So, before you download the 7000-line .ino file and panic, find a repack. Print it out. Grab your Nano, a handful of resistors, and a MOSFET. And get ready to send your first perfect “CQ” — knowing that every dit and dah is guided by a schematic that finally makes sense.
The K3NG Keyer is an open-source, Arduino-based CW (Morse Code) keyer developed by Anthony Good, K3NG. Unlike many DIY projects that offer a single, fixed configuration, the K3NG keyer is a highly modular and customizable platform. k3ng keyer schematic repack
You’re operating 100W and the keyer locks up on transmit. A good repack includes RF mitigation strategies: shielded cables, RC snubbers on the key line, and proper grounding planes. The original schematic does not emphasize this.
A 1k to 2.2k ohm resistor between the Arduino digital pin and the transistor base. 3. Paddle and Command Inputs
The primary source for the Original Project Documentation . K3NG KEYER PROJECT - ZS2EZ Place your repacked board in an aluminum enclosure
Specifically K3NG's official repo for the code and YU7AOP's repo for specialized Mega/Nano PCB layouts.
Use a solid, uninterrupted ground plane on the bottom layer of your PCB.
Once the basic keyer is working, you can expand its capabilities using the K3NG code features. Display Modules So, before you download the 7000-line
Search for “K3NG repack” in the Homebrew or CW forums. Veteran hams often share dropbox links to their clean, annotated schematics. One popular repack includes a complete parts list with Mouser part numbers.
: A specialized board designed for the Mega 2560 footprint to maximize feature availability . k3ng/k3ng_cw_keyer: K3NG Arduino CW Keyer - GitHub
: Critical for repacks using the Arduino Mega ; you must redefine pins to match the Mega’s layout instead of the standard Uno/Pro Mini layout.