3*4 keypad matrix key code code without Ardiunue (1)

password keys= 1 7 9 # Reset = 0 Other keys = false keys and partially reset the ckt. ps: - keys : 3 and * are not connected - Circuit Supply Voltage from 6 to 12 VAC or DC. - load lED indicator is optional. - Reset LED for discharging the capacitor not for indicating purpose. disgined and implemented by ENG. Mustafa Hamoud Alghaithy 22 / 4 / 2021 mustafa.ghaithy@gmail.com