K3ng Keyer Schematic 〈Fully Tested〉

The firmware reads this voltage to set words-per-minute (WPM) from about 5 to 50+.

These are wired as digital inputs with internal or external pull-down/up resistors. Usually, pressing the button connects the pin to ground (active low). k3ng keyer schematic

Below is the functional architecture of the standard K3NG keyer circuit. The firmware reads this voltage to set words-per-minute