Timer from 1 to 999s with PIC16F84A

This is a good looking and practical device that can be useful in many areas where countdown timer is needed. This project is based on the PIC16F84A microcontroller. The time range can be adjusted between 1 and 999 seconds.   This project  has 3 buttons and one of them is named Set Button. In order to regulate the seconds up or down  on the display you should press the Set button while pressing the button on the  left or the right  hand side. The author of this project is @Pedja089. More photos on Facebook Fan Page.

Download complet project : Timer from 1 to 999s with PIC16F84A


  1. Electronics News September 20, 2011 6:01 am 

    Very great article, nicely shared, useful and helpful….

  2. marco October 5, 2011 5:06 am 

    we have tried to do this but it does not work. can you give us some tips on what could be the mistake

  3. Paul Brush April 30, 2012 1:00 pm 

    Hi.. Built the project work well… thanks
    Do you have the source code for the pic to sell /share

    Paul Brush paul@pmi-services.co.uk

  4. Jenoa July 14, 2013 11:40 pm 

    Assembler, C, mikroBasic?

  5. pcba October 12, 2017 9:08 am 

    Very great article

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