LM393 Voltage Comparator Circuits

The comparator component has 2 inputs that monitor the voltage delivered to them. First input is called the – (inverting) input, and the second input is called the + (non inverting) input.

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  • Single supply comparator. Works well with zero volt reference point ground.  Can also use split power supply.
  • Open Collector output. Must pull up the voltage with an external resistor.
  • High output when – Noninverting input voltage > Inverting voltage.
  • Low output when – Noninverting input voltage < Inverting input.
  • Low voltage. Down to 2V single supply or +1V to -1V split supply according to datasheet.

LM393 Non Inverting Comparator Demonstration Circuit With A Manually Controlled Trimpot Signal video below Click here to watch directly on YouTube!

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LM393 Inverting Comparator Demonstration Circuit Trimpot Controlled by Electronzapdotcom video below: Click here to watch directly on YouTube!

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Video below: High temperature alarm electronics circuit step by step build LM393 comparator NTC thermistor buzzer Click here to watch directly on YouTube!

LM393 Comparator High Temperature Alarm using Thermistsor plus Active Buzzer and 2N2222 or other NPN Bipolar Junction Transistor BJT diagram by electronzap electronzapdotcom
LM393 Comparator High Temperature Alarm using Thermistsor plus Active Buzzer and 2N2222 or other NPN Bipolar Junction Transistor BJT diagram by electronzap electronzapdotcom
Bonus Video

393 comparator circuit using LM393 open collector output and 2N2222 NPN bipolar junction transistor


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