👉 (link placeholder)
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.
Instead of one messy diagram, two sub-blocks: k3ng keyer schematic repack
You only need: Dit/Dah, key out, and a piezo speaker. A repack trims the fat, showing you exactly which components you can omit (no LCD, no encoder). This is critical for embedding the keyer inside a small enclosure like an Altoids tin.
: A modern 2023 repack that uses SMD components, galvanic isolation (optocouplers), and a 3D-printed enclosure. SimpleCWKeyer (VE3WMB) 👉 (link placeholder) So, before you download the
For amateur radio operators, the K3NG Arduino-based Morse code keyer is nothing short of legendary. Developed by Anthony Good (K3NG), this open-source project has become the gold standard for modern keyers, offering features that rival—and often surpass—commercial units costing hundreds of dollars. From contest-grade memory functions, PS2 keyboard support, and Winkeyer emulation to touch interfaces and Bluetooth control, the K3NG keyer can do it all.
A simple piezo buzzer or a small speaker driven by a transistor to hear your Morse code locally. And get ready to send your first perfect
: A major part of the "repack" story is moving to the Arduino Mega platform . The older Uno/Nano boards often ran out of memory when users tried to enable "high-end" features like a CW decoder, USB keyboard support , or full Winkeyer emulation .
Internal pull-up resistors are enabled in the K3NG firmware, so you do not need external resistors on the paddle lines. However, adding a 0.01µF ceramic capacitor from both the Dot and Dash lines to Ground is highly recommended to prevent stray RF from causing false triggering.