Schematic Repack __top__ | K3ng Keyer

Minimal components (Arduino Pro Mini, small battery, piezo sidetone) mounted in a small junction box.

In the original, the 10k pull-up resistors for the paddle might be drawn near the power section. In a repack, they sit right next to the paddle input pins on the MCU.

Repackaging: From Prototype to Enclosed Product Goals: reduce size, improve reliability, add user-friendly controls, ensure RF immunity and operator safety.

Add ferrite beads to the paddle input lines and the keying output lines to block stray RF energy from entering the keyer logic. Please let me know: k3ng keyer schematic repack

Unlike a redesign or modification, a does not change the circuit electrically. Instead, it:

For further help, the Radio Artisan Groups.io is the primary hub for troubleshooting and community-shared schematic variants.

The transforms a complex experimental platform into a rugged, everyday shack tool. By focusing on optoisolated keying, RF filtering on the inputs, and a clean I2C display integration, you can build a keyer that rivals commercial units costing hundreds of dollars. Minimal components (Arduino Pro Mini, small battery, piezo

Design for standard 12V–13.8V amateur radio power rails.

: Match the software pins to your physical wiring. If you have custom PCB traces, this is where you "repack" the software to fit the hardware. keyer_hardware.h

: An Arduino Nano is great for basic portable builds, but use an Arduino Mega 2560 if you want the full suite of features like a CW decoder and large memories. Instead, it: For further help, the Radio Artisan Groups

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.

LCD Display (16x2) or OLED, Pushbuttons, Speaker/Buzzer. Schematic "Repack" - Key Pin Connections (Arduino Nano/Uno) Paddle Left: Pin 2 (connect via 10k pull-up to 5V) Paddle Right: Pin 5 (connect via 10k pull-up to 5V)