K3ng Keyer Schematic Hot!

If you choose a larger microcontroller like the Arduino Mega 2560, you can expand your schematic to include advanced peripherals. LCD / OLED Display Integration

Some advanced versions include a PTT delay circuit using an RC network (resistor + capacitor) to prevent hot-switching of relays.

Wire the command and memory buttons as simple momentary switches. One side of each switch goes to a digital input pin, the other side goes to GND. The internal pull‑ups are enabled by the firmware, so no external resistors are required. k3ng keyer schematic

To leverage the full power of the K3NG firmware, you can expand your schematic by wiring additional peripherals to the unused pins of your Arduino. Speed Control (Potentiometer)

Connecting an Arduino directly to a radio's key jack is risky due to high voltages, reverse polarity, and ground loops. If you choose a larger microcontroller like the

+5V | R1 (10k Ohms) | Arduino Pin 11 ---->[Resistor 1k]----+ | +---+ Base 2N2222 | |---> To Radio Key Jack (Positive/Tip) Transistor +---+ Collector | +---> To Radio Ground (Sleeve) Use code with caution. Advanced Schematic Components

The schematic varies based on the features you want to unlock. Selecting the correct Arduino micro-controller is the first design choice: One side of each switch goes to a

: Connect an I2C-based 16x2 LCD or 0.96" OLED screen using the SDA and SCL pins to display current speed, memory slots, or sent text.

Will you connect this to a or an older tube rig ? Share public link