can you help create a 0-99 counter with up , down and reset button and a start button and also once the start button is pressed it will countdown until it reach 00...i need to use pic16f84a....

 

Hello,

You just hijacked a thread in th completed projects forum:
http://forum.allaboutcircuits.com/showthread.php?t=15024

I moved it over here and now you have a thread of your own.

Bertus

 

I wondered where it went. I was working on moving it myself and boom, it was gone.

 

How far have you got so far?
Are you using 7 segment LED displays?
If so you will need to multiplex them (google it).
Start simple, try and get the 2 displays showing any 2 different digits.
If you haven't already started, get the template code for the PIC16F84A (from Microchip).
The first thing to do is to get an LED to blink, so that you can test that your basic setup and programmer are working.