Temperature Monitor Circuit Diagram: 2-Channel Alarm Design

Circuit diagram:

Notes:

Incorporating a thermistor within this configuration generates a temperature-sensitive detection system. A fluctuation in temperature will modify the output of the opamp and activate the relay, subsequently illuminating the LED. Reversing the placement of the thermistor and the 47k resistor creates a cold-activated alert system.

Integrated Circuit Description:

The circuit utilizes an operational amplifier (opamp), a fundamental integrated circuit. An opamp is a highly versatile electronic component that amplifies or buffers electronic signals. It is widely used in various applications, including amplification, filtering, and signal conditioning. The opamp in this diagram is likely a common IC such as an LM358 or similar, featuring dual input and output channels for enhanced flexibility. These ICs are often employed for their low power consumption, small size, and ease of use, making them suitable for numerous circuit designs.