Accurate Freq Measurment

Results 1 to 23 of 23

Threaded View

  1. - 3rd June 2008, 00:54 #5
    dhouston's Avatar
    dhouston
    dhouston is offline Prolific Poster
    Join Date
    Dec 2005
    Posts
    1,073

    Did you find this post helpful? Yes | No

    Default

    The minimum period for COUNT is 1mS but I've never tested it to see how accurate that is. You might try it and compare it to your current method for accuracy. It counts low to high transitions so duty cycle is really immaterial. I'm not sure why the manual even mentions duty cycle. If you use 1mS, then the result x 1000 will give the frequency. It's certainly simpler than what you do now.
    Last edited by dhouston; - 3rd June 2008 at 00:58.
    www.davehouston.net
« Previous Thread | Next Thread »

Similar Threads

  1. Easy and Accurate Clocks without RTC IC
    By paul borgmeier in forum Code Examples
    Replies: 18
    Last Post: - 28th October 2013, 21:28
  2. reducing shiftout clock freq and PS2/PC interfacing ....
    By wireless magic in forum mel PIC BASIC Pro
    Replies: 18
    Last Post: - 26th February 2008, 20:15
  3. accurate vref < 1vdc 16F876 comparator
    By mslaney in forum Schematics
    Replies: 1
    Last Post: - 23rd March 2005, 01:44
  4. HPWM on a 628 is not changing freq.
    By dtit in forum General
    Replies: 2
    Last Post: - 25th February 2005, 09:34
  5. More accurate resolution from the A/d converters
    By pjsmith in forum mel PIC BASIC Pro
    Replies: 1
    Last Post: - 5th August 2004, 22:49

Members who have read this thread : 0

You do not have permission to view the list of names.

Bookmarks

Posting Permissions

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

Forum Rules