Haizad

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July 15, 2014 at 7:51 am in reply to: About Password control door lock system using microcontroller 89c51 #11908

Haizad
Participant

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?

July 13, 2014 at 12:18 pm in reply to: INTERFACING LCD TO 8051 BY Qurat-ul-ain #11896

Haizad
Participant

Try to check the connection to the LCD. Make sure it was soldered properly. Try to adjust the contrast too

July 13, 2014 at 10:24 am in reply to: About Password control door lock system using microcontroller 89c51 #11895

Haizad
Participant

Having the same problem here. How you fix it?
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