new to programming-count down timer

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pyottboy

Joined Feb 5, 2007
3
im new at coding pics, but i was wondering if someone could provide me with some help with coding a count down timer using a keypad to enter the time, then using 2 dual seven segment leds to display the count. i wanted to use one 16f84 for the keypad, then send that data to a second 16f84 that is connected to a 4 to 16 line decoder, however i am not sure about how to set up multiplexing or how to code the pic for the timer to work properly. any help would be appreciated
 

beenthere

Joined Apr 20, 2004
15,819
Hi,

How are you at hardware? It does not seem as if you should need two PIC's to accomplish the project, unless PIC-to-PIC data transfer is part of it.

Post up your circuit and how you propose to do the tasks in outline form and perhaps we can give some help.
 

beenthere

Joined Apr 20, 2004
15,819
Explore the concept of "internal counters" in your PIC. I believe there might be a couple present.

Could you elaborate on the multiplexer? I can't figure out what it's doing in there.
 
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