K3ng Keyer Schematic ^new^ -

The K3NG firmware is susceptible to . If your voltage drops below 4.5V during a transmission, the Arduino resets. This is catastrophic during a contest.

D8 (Key Out) ------[1k]----- Base of 2N2222 Emitter ---- GND Collector ---+----- to Radio Key Input | [10k]--- +5V (pull-up, if needed) (for radios that need high) k3ng keyer schematic

Two digital pins (typically D2 and D5) are mapped to the left and right paddles to detect "dit" and "dah" inputs. The K3NG firmware is susceptible to

+---------------+ | Microcontroller | +---------------+ | | v +---------------+ | Paddle Interface | +---------------+ | | v +---------------+ | Speed and Tone | | Controls | +---------------+ | | v +---------------+ | Memory and Storage| +---------------+ | | v +---------------+ | Output Stage | +---------------+ D8 (Key Out) ------[1k]----- Base of 2N2222 Emitter

. Developed by Anthony Good (K3NG), this Arduino-based project has evolved into a comprehensive ecosystem of CW (Continuous Wave) tools, from basic Iambic keying to complex PC interfacing via WinKey emulation. 🛠️ The Core Hardware Concept

| Feature | Description | |---------|-------------| | | Decodes dots, dashes, and spaces using standard Morse timing (Farnsworth/Paris). Shows decoded text on a 16x2 LCD or OLED. | | Input validation & error flagging | Lights an LED or shows “ERR” if the input is stuck high (short circuit), low (always closed), or if timing is inconsistent (e.g., dash shorter than dot). | | Sidetone with integrity beep | Generates audio feedback via a piezo – normal sidetone plus a distinct “error beep” when invalid input is detected. | | Serial output for debugging | Prints decoded characters + timing stats to Serial Monitor (helps tuning and troubleshooting). |