K3ng Keyer Schematic __full__

"Look here," Silas pointed a calloused finger at the screen. "The schematic is designed around an Arduino, usually a Nano or a Mega. But see this section? It handles the paddle inputs. And this? The PTT (Push-To-Talk) output. It’s isolated. You won't fry your radio."

The beauty of the open-source schematic is that you can hack it. Here are popular community modifications: k3ng keyer schematic