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Temperature switch circuit three

Source: InternetPublisher:风向西瓜 Keywords: Switching circuit BSP automotive air conditioner Updated: 2020/05/05

70.<strong>Temperature</strong><strong>Switching Circuit</strong>Part 3.gif

It is the electronic thermostat circuit on an imported car air conditioner . The operational amplifiers Ai and A2 adopt LM393.
    Adjust potentiometer RP. The temperature control range can be changed. The adjustment range is: startup temperature 6~18℃, shutdown temperature 3~
15℃, and the temperature difference between startup and shutdown is 3℃.
Negative temperature coefficient thermistor R. You can choose RR03-2 type, the resistance value is 3k, Q at 25℃, or MF51 type.


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