Hello! I am trying out a set of LM393 comparators as part of a switch mode power supply. As a benchmark test for these comparators, I wired them to compare two potentiometers. The idea was that if the left potentiometer (as pictured below) was set to a higher voltage than the right potentiometer,…

The 393 is open collector so the LED cannot be powered while going to GND, you need to have it going to +Vcc. [image]

LM393 Comparator Resulting Low Logic when Expecting High

njmaas55 August 18, 2021, 9:37pm 3

This is my Schematic:

This is a link to my LM393 ic's:

Because of my computer having a notoriously bad camera, I will try and get a clearer photo on another device.

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