K3ng Keyer Schematic Repack ((install))

| Mistake | How Repack Helps | |---------|------------------| | Using wrong pins for PTT vs. CW | Table shows which pins are PWM-capable if needed | | Forgetting pull-up resistors on encoder | Schematic includes explicit 10k resistors | | Connecting LCD to D0/D1 (serial interference) | Warns against using TX/RX pins for parallel LCD | | Overloading 3.3V pin on Nano | Shows separate 5V rail for display backlight | | No common ground between keyer and rig | Highlights mandatory GND wire in output cable |

In late 2024, Anthony Good (K3NG) expressed interest in merging community repack contributions into the main repository. If successful, future keyer builders will no longer need to hunt for scattered diagrams. 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. You only need: Dit/Dah, key out, and a piezo speaker

modules and 3.5mm TRS jacks for paddles (Standard: Tip=Dit, Ring=Dah, Sleeve=GND). Cleaner Audio Path: modules and 3

Remember that the "schematic" and the "code" must match. Before uploading, open keyer_pin_settings.h in the Arduino IDE and ensure the pin numbers in the code match your physical wiring.

Anthony Good designed the K3NG keyer as a software-first project. The code supports dozens of pin configurations for various microcontrollers: Arduino Uno, Nano, Mega 2560, Teensy, STM32, and even ESP8266. Each microcontroller has a different pinout. Additionally, the keyer can be built with optional features like: