Keyboard Shortcuts * ctrl + shift + ? : * ctrl + g : * ctrl + shift + f : * ctrl + / : Arduino keyer TX line issue - Radioartisan - Groups.io
Best for standard builds with basic features.
To hear your sending without turning on your rig, the schematic includes a sidetone generator. : Driven by Arduino Digital Pin 4. k3ng keyer schematic
(in keyer_features_and_options.h ):
Highly recommended because it only requires 4 wires. Connect VCC to 5V , GND to GND , SDA to A4 (on Nano/Uno), and SCL to A5 . Keyboard Shortcuts * ctrl + shift +
The foundation of most K3NG builds includes these primary circuit blocks: HL2 and OpenCWKeyer K3NG Winkeyer - Google Groups
: A simple NPN transistor like the 2N2222 handles the heavy lifting. The base connects to a digital output pin through a 1k ohm current-limiting resistor, pulling the radio's key line down to ground when active. : Driven by Arduino Digital Pin 4
In the schematic, the Arduino digital and analog pins act as the central hub connecting all peripheral components. 1. Input Section: Paddle and Straight Key Connections
For a professional, RF-shielded finish, you can find open-source K3NG PCB designs on repositories like GitHub or OSH Park. A custom PCB minimizes wiring errors and allows you to easily house the project in an aluminum enclosure. 5. RF Immunity: Crucial Design Considerations
K3NG Keyer Wiki (contained within the GitHub repository)
