http://www.piclist.com/techref/io/keyswitch.htm

--
James

-----Original Message-----
From: piclist-bounces@mit.edu [mailto:piclist-bounces@mit.edu] On Behalf Of
Andre Abelian
Sent: Thursday, March 13, 2008 14:44
To: Microcontroller discussion list - Public.
Subject: [EE]: matrix keypad with or without diodes

Hi to all,

I put together prototype project using keypad with
individual diodes added to each key and wrote the code
every things working fine now other group took my project
and took all diodes off "bypassed" and same project is 
working fine too I do not see any problem. My question is
what's the real reason to use diodes with keypad? 

thanks

Andre  

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