i am sending you the link of door locking…
i already cheaked the ckt by writing simplie program of toggling the output on ports. so the ckt was working fine.
also tell me about eeprom coding and interlinking with the existing code.
here is the link : http://www.engineersgarage.com/microcontroller/8051projects/electronic-code-lock-with-password-using-at89c51