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Help with 60 second stopwatch project

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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.ppt
http://tennis.ecs.umass.edu/ece221/lecturenotes/ece221-ch7-part1.ppt
http://www.site.uottawa.ca/~rhabash/ELG3331LN08.pdf

Good luck!
MP

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