Brief comparator circuit using single supply op amp and voltage dividers – LM358

Operational amplifiers (op amps) have 2 inputs that determine the output voltage.

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LM358:

LM358 pin layout diagram by electronzap electronzapdotcom
LM358 pin layout diagram by electronzap electronzapdotcom
  • Noninverting input (+) voltage higher than inverting input (-) voltage = High output.
  • Noninverting input (+) voltage lower than inverting input (-) = Low output

High output means the voltage is as close to the positive supply voltage as it can get. A low output means the output is as close to the negative supply voltage as it can get.

Diagram

Simple single supply op amp comparator using voltage dividers schematic diagram by electronzap electronzapdotcom
Simple single supply op amp comparator using voltage dividers schematic diagram by electronzap electronzapdotcom

Affiliate link ad. Kit I bought and use often these days for common integrated circuits.

Video

Quick single supply op amp non inverting comparator circuit using LM358 operational amplifier

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  • Information on this site is not guaranteed to be accurate. Always consult the manufacturer info/datasheet of parts you use. Research the proper safety precautions for everything you do.