(Atmega328P). The beauty of the design lies in its modularity; the schematic can be as simple or as complex as the user requires. Input Stage:
USB interfacing with logging software via K1EL Winkeyer emulation protocol.
To isolate your radio safely, use an optocoupler (e.g., 4N25 or PC817) or a switching NPN transistor (e.g., 2N2222). NPN Transistor Keying Circuit Schematic:
What you want to add (like an LCD screen or WinKey emulation)? Share public link k3ng keyer schematic
The K3NG Keyer is a highly versatile, open-source Morse code keyer based on the Arduino platform, developed by . Because it is designed to be modular and feature-rich, the "schematic" can range from a simple breadboard setup to complex PCB designs incorporating LCDs, rotary encoders, and multi-rig switching. Core Schematic Components
By carefully following this schematic layout and customizing the accompanying keyer_features_and_options.h firmware file, you will create an incredibly robust, high-performance CW keyer tailored specifically to your ham radio shack.
Connects data and clock lines to digital pins to allow keyboard-driven transmission. (Atmega328P)
Because users often use different Arduino models, the specific pin assignments are defined in the keyer_pin_settings.h file within the K3NG Keyer Code Feature Selection: You must enable or disable specific features (like FEATURE_LCD FEATURE_WPM_POT keyer_features_and_options.h file before uploading the code to your hardware. Isolation:
If you experience hum or noise when connecting the keyer to a computer and a radio simultaneously, ensure your optocoupler circuit is wired correctly to isolate the grounds.
[+5V / GND Power Source] │ ▼ [Paddles] ───► [Arduino] ◄─── [Speed Pot / Encoder] │ ┌────────┴────────┐ ▼ ▼ [Keying Circuit] [Sidetone Audio] │ │ ▼ ▼ (To TX Rig) (Speaker/Phones) 1. The Microcontroller (The Brain) To isolate your radio safely, use an optocoupler (e
Connect Arduino pin to a 10k-ohm potentiometer (for volume control).
For a cleaner sine-wave or adjustable volume, interface Pin 13 with a simple low-pass RC filter and a 10K ohm potentiometer before routing it to an audio amplifier (like an LM386 module). 3. The Transmitter Keying Output (Crucial Safety Step)
He placed the Nano at the center. He soldered the paddle inputs to digital pins D2 and D3, exactly as the schematic dictated. He added the speed potentiometer to the analog pin. He carefully constructed the output stage, using a 2N2222 transistor to key the transmitter, his movements guided by the precise lines of the K3NG diagram.
The K3NG keyer is a popular electronic keyer designed for amateur radio operators. It's a versatile and feature-rich device that allows for efficient and precise CW (Morse code) transmission. In this post, we'll delve into the K3NG keyer schematic, exploring its components, functionality, and benefits.