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Building comparator from discrete components?

  1. May 31, 2013 #1
    Hi, I'm interested in building a breadboard version of the simplest comparator using transistors and resistors. Ultimately I'd like to understand the LM393 but looking at the datasheet schematic, it seems quite complicated. I was hoping there was a simpler comparator I could mimic to start out with. Thanks.
  2. jcsd
  3. May 31, 2013 #2
    Like how about this for the 139, it seems more doable/understandable for my skill level:


    Is there something even simpler? Or is anything in this circuit not necessary for understanding the comparator action?
  4. Jun 1, 2013 #3


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    Staff: Mentor

  5. Jun 2, 2013 #4
    Thanks, thats just what I needed!
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