One of the temperature switch circuits
Source: InternetPublisher:方世玉223 Keywords: Switching circuit BSP relay Updated: 2021/04/16
The temperature switch circuit uses a certain temperature value as a switch, so that when this temperature value is reached, the controlled
object is turned on or off. Its principle is the same as that of the temperature control circuit.
The circuit is shown in Figure 11-68. It is actually a BJWO-1 type transistor temperature relay . Adjusting the potentiometer RP can
change the measured temperature, that is, change the action value of the relay . The
negative temperature coefficient thermistor Rt can be selected from the MF51 type.
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