Sorry, I'm not quite sure what you mean. I only use one GND pin from the Arduino board and that's to attach the 10kohm resistor to it from the breadboard. The only pins I use are the ones seen in the diagram.
Sorry, I'm not quite sure what you mean. I only use one GND pin from the Arduino board and that's to attach the 10kohm resistor to it from the breadboard. The only pins I use are the ones seen in the diagram.