10Mhz universal counter

Posted on Jul 25, 2012

This is a minimum component complete Universal Counter. It can use input frequencies up to 10 MHz at INPUT A and 2 MHz at INPUT B

10Mhz universal counter
Click here to download the full size of the above Circuit.

If the signal at INPUT A has a very low duty cycle, it may be necessary to use a 74121 monostabLe multivibrator or similar circuit to stretch the input pulse width to be able to guarantee that it is at least 50 ns in duration.

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