K3ng Keyer Schematic Repack |link| Jun 2026

Use the SDA (A4) and SCL (A5) pins. A 16x2 I2C LCD allows you to see your speed, memory contents, and settings without needing a computer.

: Keep signal traces (paddles, potentiometers) at a standard 10 mil width. Widen the keying lines and power rails to 20 or 30 mils to handle potential current surges. Connector Placement : Group the

Start with the basic CW keyer functionality (paddles and output) and gradually add features like the LCD, memory buttons, and encoder. 4. Configure the Software k3ng keyer schematic repack

Support for I2C LCD (16x2 or 20x4) to show speed and sent text. Critical Documentation

Specifically K3NG's official repo for the code and YU7AOP's repo for specialized Mega/Nano PCB layouts. Use the SDA (A4) and SCL (A5) pins

: Contemporary repacks, such as the Joan Perez Lopez GitHub version , consolidate the schematic into a professional PCB with SMD components . These designs often add:

Component choices & layout

The most common choice for "repacks" due to its small size. Note that it has memory limits, so you may need to disable some advanced features in the code.

The is an invaluable tool for homebrewers, educators, and anyone debugging their build. It transforms a powerful but sprawling design into a clean, almost breadboard-friendly diagram. If you’ve been avoiding the K3NG Keyer due to schematic anxiety, find a trusted repack – you might be surprised how simple it really is. Widen the keying lines and power rails to