How can I display numbers pressed on a 13-pin numeric keypad to a 2x16 LCD display?

The keypad is 13-pin because each of the 10 digits plus the '; * '; and '; # '; have their own output, the 13th pin is their common ground.





The LCD display has 14 pins.





I know this circuit uses a PIC16F84A microcontroller, but I just don't know how to do it.





ThnanksHow can I display numbers pressed on a 13-pin numeric keypad to a 2x16 LCD display?
http://www.bobblick.com/techref/projects鈥?/a>


Includes a description and schematics etc.

myspace.com social network