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  • 2 months later...

I have an example of a tally or event counter based upon a CD4553 BCD counter IC in conjunction with a CD4511 BCD-to-7 segment driver with three 7-segment LED displays. This could be easily modified to feed in the 555 output as the trigger for counter/tally.

Have a look at the following site which has full schematics and construction details etc.





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