K3ng Keyer Schematic [new] «Desktop SIMPLE»

A standard 3.5mm stereo jack is required for your Iambic paddles.

Elias wiped the sweat from his forehead with the back of his hand, leaving a smudge of grime. He squinted at the chaotic mess of wires sprawling across his workbench. He was trying to build a custom interface for his 1950s Hammarlund receiver, but his current straight key was murdering his wrist. He needed a memory keyer—something that could handle the repetition of contest calling without giving him carpal tunnel syndrome before the weekend was over. k3ng keyer schematic

Which (Nano, Uno, Mega) are you planning to use? A standard 3