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5-7 digit up/down counter with display

Discussion in 'Misc Electronics' started by Sam Goldwasser, Jun 23, 2008.

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  1. I know, not really repair, but this newsgroup has at least as good
    suggestions as the others and I'll cross-post to sci.electronics.misc.

    I need to either build or acquire an up/down counter with LED display
    that is at least 5 digits, 7 preferred. Count speed is 10 MHz max.

    I found the Maxim ICM7217
    (http://datasheets.maxim-ic.com/en/ds/ICM7217-ICM7217C.pdf)

    which seems easy enough to use - 2 of these and a bunch of 7 segment LED
    displays. But I'm open to other suggestions.

    Even if someone had a complete unit scrapped out they'd be willing to
    sell cheap! :)

    Thanks.

    --- sam | Sci.Electronics.Repair FAQ: http://www.repairfaq.org/
    Repair | Main Table of Contents: http://www.repairfaq.org/REPAIR/
    +Lasers | Sam's Laser FAQ: http://www.repairfaq.org/sam/lasersam.htm
    | Mirror Sites: http://www.repairfaq.org/REPAIR/F_mirror.html

    Important: Anything sent to the email address in the message header above is
    ignored unless my full name AND either lasers or electronics is included in the
    subject line. Or, you can contact me via the Feedback Form in the FAQs.
     
  2. Yeah, even the ICM7217 may be marginal. I see it's only guaranteed to
    2 MHz, though 5 MHz typical. It's not that there is a need for a
    sustained count rate above that, but I can't guarantee that two
    clocks won't occur quite close together.

    Thanks for thinking about it. :)

    --- sam | Sci.Electronics.Repair FAQ: http://www.repairfaq.org/
    Repair | Main Table of Contents: http://www.repairfaq.org/REPAIR/
    +Lasers | Sam's Laser FAQ: http://www.repairfaq.org/sam/lasersam.htm
    | Mirror Sites: http://www.repairfaq.org/REPAIR/F_mirror.html

    Important: Anything sent to the email address in the message header above is
    ignored unless my full name AND either lasers or electronics is included in the
    subject line. Or, you can contact me via the Feedback Form in the FAQs.
     
  3. Sorry, nothing but quoted text? :)

    --- sam | Sci.Electronics.Repair FAQ: http://www.repairfaq.org/
    Repair | Main Table of Contents: http://www.repairfaq.org/REPAIR/
    +Lasers | Sam's Laser FAQ: http://www.repairfaq.org/sam/lasersam.htm
    | Mirror Sites: http://www.repairfaq.org/REPAIR/F_mirror.html

    Important: Anything sent to the email address in the message header above is
    ignored unless my full name AND either lasers or electronics is included in the
    subject line. Or, you can contact me via the Feedback Form in the FAQs.
     
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