Keyer Schematic [upd] — K3ng

The Case of the Trembling Paddle

If you look at any K3NG schematic (v1.0, v2.0, or the latest "Next Generation" variants), you will see five distinct sections:

Step 2: Focus on the "Keyer Paddle Inputs" box.

Solder two 4.7k resistors from pins 2 and 3 to +5V. Solder your left paddle wire to Pin 2. Right paddle to Pin 3. k3ng keyer schematic

He saw a symbol he recognized: an Optocoupler (specifically a 4N35). The schematic showed the microcontroller driving the LED inside the optocoupler. When the code fired, the LED lit up, triggering the internal transistor to close the keying line on the radio. The Case of the Trembling Paddle If you

K3NG keyer schematic

Building one starts with understanding the . Whether you are building it on a breadboard or a custom PCB, 1. The Brain: Arduino Nano or Uno MCU: Arduino Nano (or Pro Micro) No display

• MCU: Arduino Nano (or Pro Micro)
• No display (use LED for status)
• No buttons (speed controlled by pot or command-line via serial)
• Only one transistor for keying.
• Schematic size: 10 components.

Do not do this.

Additional keying lines for controlling external amplifiers or switching sequences. 3. Implementation Tips Pin Configuration: