Dear Shah, I try to send the | Microcontroller › 8051 › About Password control door lock system using microcontroller 89c51 › Dear Shah, I try to send the July 15, 2014 at 7:51 am #11908 HaizadParticipant Dear Shah, I try to send the code but my post was flagged as spam. Can you give me your email? I’ll email you the coding. Do I need to connect all the pin of P0 to pull up resistor bofore connecting it to the keypad pins?
