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D.I.Y. Continuity Tester

We have always used the continuity function of a multimeter to find out continuity in PCB,wires,circuit traces,fault detection,etc. When continuity is found the Buzzer inside the meter rings and when there is no continuity it does not ring.
We will here make the same thing by using just a Basic Comparator and some resistors..
This will enable us to make such circuit ourselves and will also give us a practical example of working of OPAMP as Comparator,,”

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