Discussion in "Project Doubts" started by    mifinn    Oct 5, 2006.
Thu Oct 05 2006, 08:59 PM
#1
hello there bro.I need a bit of your help for the project mentioned in the subject i have to interface a keypad of 4x4 with this circuit but i have no idea plz help me out asap i ve very less time left .thank u
Fri Oct 06 2006, 11:07 AM
#2
its simple... just connect a keypad.. you have P0 vacant.. use it..
4 pins of P0 for sensing and rest of four pins for driving.. you should connect Pullups to P0 make sure.. coz its open collector.

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