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counter using 4520bd

counter using 4520bd

‎09-18-2010 06:45 AM

I'm having problems with this counter / gate circuit. I'm expecting the NAND gate 4011 to go high on the third clock pulse into the counter, CP1,  then to reset according to time constant set by R1 C1. The state of 1Y doesn't seem to be as I'm expecting. Is it the circuit or the simulation?

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Re: counter using 4520bd

‎09-19-2010 05:59 AM

I see my error now. Its my fault, slight change and now working as expected!

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