Canas Posted January 30, 2004 Report Share Posted January 30, 2004 Have to design a 60s stopwatch on ETS 7000 logic trainer using 74LS74, 74LS93 and 74LS00 IC chips does any one have any relevantant information any help is appreciated. :-\ Quote Link to comment Share on other sites More sharing options...
russlk Posted February 8, 2004 Report Share Posted February 8, 2004 There is not enuf information here: What is the source of time? What does the output look like? Quote Link to comment Share on other sites More sharing options...
MP Posted February 8, 2004 Report Share Posted February 8, 2004 What you are referring to is a MOD-60 or MODULO-60 counter. You can use a MOD-10 counter with one of the 74LS93s and a MOD-6 counter with the other to provide a MOD-60.Here are some links. Some are ppt, so the download will take a while. The time to wait is worth it, though. Great examples and illustrations and they have the circuit that you need.http://www.phx.devry.edu/fac/thomas/EET202/Cntrs.ppthttp://tennis.ecs.umass.edu/ece221/lecturenotes/ece221-ch7-part1.ppthttp://www.site.uottawa.ca/~rhabash/ELG3331LN08.pdfGood luck!MP Quote Link to comment Share on other sites More sharing options...
hotwaterwizard Posted February 9, 2004 Report Share Posted February 9, 2004 Here are some more links to check out.http://www.doctronics.co.uk/4013.htmhttp://www.elec.qmw.ac.uk/staffinfo/davew/lab/ttl74.htmhttp://www.faqs.org/docs/electric/Digital/DIGI_11.htmlhttp://www.pcbcafe.com/BOOKS/SpiceHandBook/08_chapter07-02.phphttp://wug.physics.uiuc.edu/courses/phys344/fall03/344exp/Lab2_TTL_Logic/Lab2_TTL_Logic.pdfhttp://people.msoe.edu/~welch/summer/presentation.pdfhttp://www.play-hookey.com/digital/decimal_counter.html Quote Link to comment Share on other sites More sharing options...
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