Working principle of NTC thermostat

　　1. Mechanically, two layers of metals with different thermal expansion coefficients are pressed together. When the temperature changes, its bending degree will change. When it is bent to a certain extent, the circuit is connected (or disconnected) to make the cooling (or heating) ) device works.

　　2. Electronically convert temperature signals into electrical signals through temperature sensing devices such as thermocouples and platinum resistance, and control relays through single-chip, PLC and other circuits to make heating (or cooling) equipment work (or stop).

　　Thermostat (Thermostat), according to the temperature change of the working environment, physical deformation occurs inside the switch, resulting in some special effects, a series of automatic control components that produce on or off actions, or electronic components at different temperatures, Different principles of the working state are used to provide temperature data to the circuit for the circuit to collect temperature data. How temperature controllers work

Read recommendations:

What is surface mount technology (SMT)?

Classification of digital filters

PIR Lens 7708-1

2109 PIR lens

HW-M09-2 microwave sensor module