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.
While not in the classic schematic, the "Next Generation" K3NG adds an ESP8266. The schematic routes RX/TX (Pins 18/19) to the ESP. This allows you to key via a web browser. Conclusion: Your Map to CW Mastery The K3NG keyer schematic is intimidating only if you look at it as a monolithic diagram. Break it down: It is just five small circuits working together. The Arduino reads switches (paddles), processes your Morse code via the legendary K3NG firmware, and closes a transistor to ground your radio's key jack.
Introduction In the world of amateur radio, few open-source hardware projects have achieved the level of reverence and functionality as the K3NG Keyer . Developed by Anthony Good ( callsign K3NG ), this Arduino-based keyer is not just a simple device to send "di-dah-dit." It is a feature-packed, contest-grade CW (Continuous Wave) controller that rivals commercial keyers costing hundreds of dollars. k3ng keyer schematic
Locate the 2N2222 transistor. Identify the Emitter (Arrow). Solder that to GND. Solder a 1k resistor from Pin 9 to the Base . Solder a wire from the Collector to your radio's "Tip" of the 3.5mm jack. Solder a separate GND wire to the "Sleeve" of the jack.
At the heart of this project lies the . For many new builders, looking at this schematic for the first time can be intimidating. It looks like a spiderweb of resistors, capacitors, transistors, and an Arduino Mega or Uno. Solder two 4
The built-in speaker pin (Pin 8) is weak. The schematic can be extended to include an LM386 audio amplifier circuit. This adds a 10k pot for volume and a small speaker. Look for "K3NG Audio Filter" schematics.
Some schematics show a 10kΩ resistor specifically for the straight key input (Pin 7). Straight keys are mechanical switches that bounce. The firmware handles debouncing, but the resistor ensures the logic level is valid. Section 3: The Output Stage – Don't Fry Your Arduino The biggest mistake new builders make is connecting Pin 9 (Key Out) directly to their radio's "CW Key" jack. While not in the classic schematic, the "Next
Start with the minimal build (Arduino + 2 resistors + 1 transistor + 2 paddles). Once you get a "dit" on the air, add the LCD. Then add the encoder. Then add the PS2 keyboard. The schematic supports it all.