At its most basic, the K3NG keyer requires an Arduino (Uno, Nano, or Mega) and a few interface components: Processor: Typically an Arduino Nano for basic builds, or an Arduino Mega for feature-heavy versions requiring more pins and memory. Paddle Input:
The heart of the schematic is the ATMega328P (on Nano/Uno) or ATMega2560 (on Mega). The key pins to identify are: k3ng keyer schematic
An optional 10k or 100k pot allows for manual CW speed adjustment, typically ranging from 1 to 999 WPM. Advanced Hardware Options At its most basic, the K3NG keyer requires
Depending on your needs, you can expand the schematic with these common additions: Visual Output: Standard 4-bit LCDs or I2C-based displays for status and CW decoding. External Memories: At its most basic
