The authoritative source is the ( github.com/k3ng/k3ng_keyer ). Look in:
The simplest schematic uses a USB cable (5V). For portable operation, you need an . k3ng keyer schematic
When you download k3ng_keyer-master.zip from GitHub and open the /hardware folder, you will find PDF schematics. Look for these specific labels: The authoritative source is the ( github
By understanding the schematic, you can troubleshoot issues, add features like Bluetooth or GPS, or strip it down to the bare minimum for a pocket-sized keyer. you can troubleshoot issues