Скачать или смотреть Overheat Protection Circuit | NTC Thermistor + Comparator

In this video, I show how to build a simple analog overheat protection circuit using an NTC thermistor and a comparator.

This circuit detects excessive temperature and switches the output when a defined threshold is exceeded.
No microcontroller, no software — just pure analog electronics.

The project is built on a breadboard and focuses on understanding:

how an NTC thermistor works

how a comparator detects temperature thresholds

how hysteresis prevents output oscillation

how to set a reference voltage for overtemperature detection

This is a basic protection concept, intended for learning and experimentation, not a calibrated industrial solution.

🧠 What you’ll learn

Overtemperature detection using an NTC thermistor

Comparator basics for thermal protection

Simple hysteresis implementation

Analog protection without a microcontroller

🔧 Components used

NTC thermistor

Comparator (LM393 / LM358 or similar)

Resistors

Breadboard and power supply

⚠️ Important note

This circuit is for educational purposes only.
It is not temperature-calibrated and should not be used as a final safety system.

🔔 Series

This video is part of my Electronics Basics series, where I explain fundamental circuits step by step.