LM393 Low Power Dual Voltage Comparators DIP-8 test circuit.
Very inexpensive and a good way to learn about OpAmps. Needs 9 volts to operate.
Switch not in schema or PCB, added while building.
Zip file contains a short video of the circuit working.
Tested with DBL358, IR3F02, IR9082, IR94558, JRC4558D, NE5532, KIA393P, HA17393
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