[Moved] Project on password controlled device

[Ogu Reginald]

I am not familiar with AT89S52 microcontroller, but there is a demand for me to build a project using the above microcontroller to enable a device to be controlled by a four digit password and also the status of the project should be displayed on an LCD. Please friend help me with the circuit diagram and source code for the project, I am grateful.

 

[pavans2510]

Re: Project on password controlled device

HI,
Its quite simple, Below link will help you out wrt interfacing with the LCD. In the below link 11 i/o pins are used for LCD(but 6 i/o pins is more than sufficient).
http://eeemagazine.blogspot.in/2010/10/coming-soonbasic-microcontroller.html
Now interfacing with a keypad check the below link.
http://shree-electronics.com/interfacingkeyboard.html

Just synchronizing both the functions will complete your project.

All the best