Logic test probe with memory

Posted on May 9, 2012

There are two switches: a memory disable switch and a pulse polarity switch. Memory disable is a push-button that resets the memory to the low state when depressed. Pulse polarity is a toggle switch that selects whether the probe responds to a high-level or pulse (+5 V) or a low-level or pulse (ground)

Logic test probe with memory
Click here to download the full size of the above Circuit.

(Use IC logic of the same type as is being tested).

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