the controller circuit of the temperature(10)

Published:2011/7/7 6:51:00 Author:Ariel Wang | Keyword: controller, temperature | From:SeekIC

The 220V AC voltage is reduced by T,commutated by VD1～VD4,regulated by IC5,filtered by C1.It provides +9V working voltage for the temperature indicator circuit of LED and the control circuit of the heater.IC1 is the voltage-type positive temperature coefficient integrated temperature sensor.The sensibility is 10mV/℃.The output voltage is 2.73V when it's 0℃.The output voltage is 3.73V when it's 100℃.When the detected temperature changes,the output voltage of IC1 and the input voltage from the pin-5 of IC4 change synchronously. When it's processed by tenth voltage comparator in IC4,the drivers VL1～VL10 give out the light.It indicates the temperature value.



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