High frequency counter

+ Reply to Thread
Results 1 to 2 of 2
  1. #1
    Join Date
    May 2009
    Saint-Quentin-en-Yvelines, FRANCE

    Default High frequency counter


    I would like to measure the frequency of a square wave signal up to 20 MHz.

    I do not want to pre-divide the frequency to avoid a loss of accuracy and/or increasing the measurement time.
    I am currently using a PIC 18F2685. It works fine with the signal applied to Timer 3 but only up to 2 MHz.

    Does somebody know a PIC 18F with a timer able to count at this high frequency ?

    Many thanks


  2. #2
    Join Date
    Nov 2003

    Did you find this post helpful? Yes | No

    Default Re: High frequency counter

    Hi Mike.

    Maybe this can help you:

    With a humble 16C5x pic can measure up to 50MHz.

    Though use of prescaler is necessary, it does not reduce accuracy.


Similar Threads

  1. Frequency counter
    By Macgman2000 in forum mel PIC BASIC Pro
    Replies: 4
    Last Post: - 4th February 2012, 14:33
  2. frequency counter help and pointers
    By comwarrior in forum General
    Replies: 2
    Last Post: - 30th June 2009, 11:51
  3. high voltage high frequency H-Bridge
    By George in forum Off Topic
    Replies: 6
    Last Post: - 27th April 2009, 11:50
  4. Frequency Counter
    By Asmith in forum mel PIC BASIC Pro
    Replies: 15
    Last Post: - 22nd June 2007, 15:54
  5. Low-Frequency Counter
    By Zeke in forum General
    Replies: 7
    Last Post: - 19th January 2006, 18:06

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts