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Electronics Forum / Electronics / June 20085-7 digit up/down counter with display
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. >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. [quoted text clipped - 14 lines] > > --- sam | Sci.Electronics.Repair FAQ: http://www.repairfaq.org/ Sam, I thought that Velleman made a kit that would do your bidding, but it seems that their up/down counter kit is for low speed (switch) inputs... only 200 counts per second. Red Lion Controls makes a 10KHz presettable counter; I see those infrequently on Ebay, usually in the $40 - $80 range. I remember servicing some HP presettable counters a number of years ago, and I know that one of those would easily work for you, but a quick search on Ebay turned up nothing. Neither Ramseykits nor any of the other kit makers have anything useful. So it seems, at first glance, that your ICM7217 solution might be the most expedient.  SignatureDave M MasonDG44 at comcast dot net (Just substitute the appropriate characters in the address) Experience: What you get when you don't get what you want > >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. [quoted text clipped - 26 lines] > So it seems, at first glance, that your ICM7217 solution might be the most > expedient. 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. >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. [quoted text clipped - 7 lines] >which seems easy enough to use - 2 of these and a bunch of 7 segment LED >displays. But I'm open to other suggestions. --- news:csuv54tpdimmf91g4fa81n1uo0f79mvg68@4ax.com JF > >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. [quoted text clipped - 7 lines] > >which seems easy enough to use - 2 of these and a bunch of 7 segment LED > >displays. But I'm open to other suggestions. 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. > --- > news:csuv54tpdimmf91g4fa81n1uo0f79mvg68@4ax.com > > JF >> >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. [quoted text clipped - 24 lines] >> >> JF ^^^^^^^^^^^^^^^^^^^^ is a link to a post in a.b.s.e, Sam. There's a PDF attachment. SignatureDave M MasonDG44 at comcast dot net (Just substitute the appropriate characters in the address) Experience: What you get when you don't get what you want |
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