K3ng - Keyer Schematic

This public link is valid for 7 days and shares a thread, including any personal information you added. This link or copies made by others cannot be deleted. If you share with third parties, their policies apply. Can’t copy the link right now. Try again later. Using the K3NG Arduino CW Keyer with N1MM Logger+

For a functional, basic K3NG keyer, you do not need to connect all the options. A minimum viable product (MVP) can be built on a breadboard. 1. The Brain: Arduino Board Most builders use an , Go to product viewer dialog for this item. , or Go to product viewer dialog for this item.

These components allow you to interact with the keyer and send Morse code:

: Wired to a digital pin to put the keyer into configuration mode, allowing settings to be adjusted via Morse code audio menus. 2. Transmitter Keying Line (Galvanic Isolation) k3ng keyer schematic

The paddle inputs utilize the Arduino’s internal pull-up resistors. When you press the paddle, it grounds the pin.

A simple piezo element can be wired directly between a designated PWM pin (often D11) and ground.

Connects to Arduino Digital Pin D5 and GND . This public link is valid for 7 days

Arduino Mega 2560 (recommended for more features/memory) or Arduino Uno/Nano.

Power

"Rube Goldberg would be proud," Silas grunted. "But if you want elegance, you don't need a bucket of logic chips. You need the K3NG." Can’t copy the link right now

: Connect a momentary push-button between a digital pin and GND to access the keyer's configuration menu.

connected to an analog input pin allows for real-time WPM (words per minute) adjustment. 2. Advanced Features & Optional Add-ons The schematic can be expanded to include: LCD Display:

Many radios require the key line to be shorted to ground when keyed. The K3NG schematic typically includes a jumper to select between:

House your keyer in a metal/aluminum box. Ensure the box is connected to the circuit's ground plane.