Triggered clock

Discussion in 'General Electronics Chat' started by Floating, Feb 7, 2005.

  1. Floating

    Thread Starter New Member

    Feb 7, 2005
    3
    0
    Hello :)

    I have an AD converter (Advantech PCM 3718H) that needs to acquire 512 values at 20 us interval after the raise of an external trigger. The problem is that the AD converter doesn't support that kind of acquisition. It can just acquire data on each raise of an external trigger. So I was wondering how I could build an easy clock at 20 us that is triggered by my external trigger. Then I would just have to attach it to the AD converter to obtain what I want.

    How complicated (or simple) is that circuit that generates a clock when my trigger gets high?

    Thank you very much,

    Marc
     
  2. n9xv

    Senior Member

    Jan 18, 2005
    329
    1
    A 20-uS clock would be 50-KHz. That could be done with a 555 timer or self contained crystal clock package.
     
  3. Floating

    Thread Starter New Member

    Feb 7, 2005
    3
    0
    Thank you for your reply :)

    Do you maybe have any links to some schematics for that triggered clock? I am still very new to electronics.. ^^;
     
  4. hgmjr

    Moderator

    Jan 28, 2005
    9,030
    214
    National Semiconductor Website

    As a followup to n9xv's suggestion:

    Above is a link to the datasheet for the CMOS TIMER LMC555 on the National Semiconductor Website. There are a number of useful application examples. I think the one that should interest you most is the monostable operation.

    If you look around on the Internet you should be able to find other websites with 555 timer application examples on them.

    If you have trouble with the link, just go to www.national.com and search on the part number lmc555.

    Good Luck
     
  5. Floating

    Thread Starter New Member

    Feb 7, 2005
    3
    0
    Thank you for your help :)
     
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