"Heater Control Circuit – Intelligent Temperature Regulation"

The Heater Control Circuit is an advanced temperature management system designed to automatically switch a heating element ON or OFF based on precise thermal readings. Powered by a battery pack, this circuit offers reliable performance in portable and standalone applications.

At the heart of the design is an NTC thermistor—a temperature-sensitive resistor whose resistance decreases as the temperature increases. This component continuously monitors the ambient or target surface temperature.

The circuit uses transistors as electronic switches to control the heater’s operation. Resistors are strategically placed to set bias levels and limit current, while capacitors enhance stability and noise immunity. An LED indicator provides visual feedback, showing the heater’s status in real time.

Here’s how it works:

• When the measured temperature falls below a set threshold (e.g., 25°C), the circuit activates the transistor, powering the heating element.

• When the temperature reaches the upper limit (e.g., 70°C), the NTC triggers the control logic to switch the heater OFF, preventing overheating.

This intelligent on/off cycling ensures energy efficiency, safety, and consistent temperature control, making it ideal for small incubators, portable heaters, and temperature-sensitive devices.

This is more than a heating system—it’s smart thermal control, engineered for precision and safety.