keypad interfacing and full details how to interface

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baga

Joined Jan 30, 2009
1
this is baga i have problem with interface of keypad i need information on how to interface 4x4 keypad with PIC16F877A.
 

hgmjr

Joined Jan 28, 2005
9,029
this is baga i have problem with interface of keypad i need information on how to interface 4x4 keypad with PIC16F877A.
If you are referring to the typical 4 by 4 keypad, then you could use the "charlieplexing" approach.

hgmjr
 
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