K3ng Keyer Schematic Repack ❲2027❳

+---------------------------------------------+ | Power Supply (USB / 5V) | +----------------------+----------------------+ | v +----------------------+----------------------+ | Microcontroller Core | <--- Speed Pot / Buttons | (Arduino Nano or Mega 2560) | <--- CW Iambic Paddles +-------+-----------------------------+-------+ | | v v +--------------+--------------+ +------+----------------------+ | Rig Isolation & Output | | Display & Peripherals | | (Optocouplers / PTT Line) | | (I2C LCD / PS2 / Sidetone) | +-----------------------------+ +-----------------------------+ 1. The Inputs (Paddles, Buttons, and Pots)

: Do not solder immediately. Breadboarding the circuit first allows you to verify your wiring and pin definitions before final assembly.

To give you a concrete idea of how these schematics come together, here are a few popular build variations. k3ng keyer schematic repack

Background and Core Features

+--------------------------------------------+ | 5V/3.3V Regulator | +---------------------+----------------------+ | v +------------------+ +-----+------+ +-------------------+ | Paddle Inputs |-->| |<--| Speed Potentiometer| +------------------+ | | +-------------------+ | ATmega328P | +------------------+ | (Nano) | +-------------------+ | LCD/OLED Display |<--| |-->| Opto-Isolated PTT | +------------------+ +-----+------+ +-------------------+ | v +-----+------+ | Audio Amp |--> Speaker/Sidetone +------------+ Power Supply Section Separate the digital logic ground from the radio

[ Paddle Inputs ] ---> [ Arduino Controller ] ---> [ Keying Circuit ] ---> [ Transmitter ] | [ User Interface ] (LCD, Buttons, Potentiometers) The Unified Repack Schematic Breakdown

Have you created a K3NG schematic repack? Share it on Groups.io or GitHub with the tag #K3NGRepack. The community depends on your contributions. most compact Arduino board to use

Separate the digital logic ground from the radio transmission ground.

Knowing this, I can give you advice on the best, most compact Arduino board to use, or even suggest a pre-made PCB option . Getting Started with the K3NG Arduino CW Keyer 1