Keypad pin 4 to Arduino digital 8 //R4; Keypad pin 5 to Arduino digital 4 //C3; Keypad pin 6 to Arduino digital 7 //R3; Keypad pin 7 to Arduino digital 6 //R2; Since keypads are available from many ...

4x4 Membrane Keypad Pinout. The pinout of a 4x4 membrane keypad typically consists of 8 pins, 4 for the columns and 4 for the rows. The pin configuration may vary depending on the specific keypad ...