Matrix keyboard arduino 1 pin

@Roman777888

9 years ago

https://everycircuit.com/circuit/4952823651631104

How to connect 4*4 matrix (8pin) keyboard to arduino using only 1 analog input. Arduino connects (instead of "Voltmeter +" wire to "A0", "GND" - "GND", instead of "Batterey +" wire to "+5V".