Op-Amp Comparator Explained — Simple Circuit, Powerful Applications
Op-Amp Comparator Explained — Simple Circuit, Powerful Applications
Op-Amp introduction video : • Op-Amps Explained: The Tiny Chip That Does...
In this video, we’ll break down one of the simplest yet most useful op-amp circuits — the voltage comparator.
You’ll learn how an op-amp can compare two voltages and instantly switch an output when one crosses a set threshold.
We’ll cover:
What an op-amp comparator does and how it works
Real-world examples: low-battery indicator, temperature control, light-activated switches, solar trackers, water level controllers, and more
Using the LM358 op-amp for single-supply comparator circuits
Understanding open-loop vs. closed-loop operation
How a comparator turns slow voltage changes into sharp, decisive outputs
By the end, you’ll know exactly how to build and use a comparator circuit in your own electronics projects.
Chapters:
0:00 – Intro
0:08 – What is a Voltage Comparator? (Basic Concept)
0:23 – Real-World Applications of Op-Amp Comparators
1:30 – LM358 Pinout, Wiring, and Power Setup
2:40 – How an Op-Amp Comparator Works
3:33 – Open-Loop vs. Closed-Loop Explained
5:25 – Practical Sine Wave Comparator Example
If you’re new to op-amps, check out our Op-Amp Introduction video first — link in the description!
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