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Frigidaire Gallery Range Keypad Membrane And Console Assembly houses the keypad membrane (touch pad) that the user inputs information with. The touch pad / keypad membrane is built into the console and can't be purchased separate. Learn how to make a door lock system using password with keypad and electromagnetic lock. When the door is unlocked by a correct password, It keeps the door unlocked for 20 seconds, and then automatically lock the door again. The Arduino code supports multiple passwords. The detail instruction, code, wiring diagram, video tutorial, line-by-line code explanation are provided to help you quickly ... Our four rows are all connected to ground through the 10k resistors. So our four inputs to the microcontroller namely - PORTA pin 3 I.E. if we had pushed the 0 key on the keypad, then we would have copied '00' into the what_button variable. this number '00' is then added to the program counter...