consisting of 555 the indoor humidity control circuit

Published:2011/6/20 8:57:00 Author:Fiona | Keyword: consisting of 555, the indoor humidity control | From:SeekIC

The controller is composed of step-down rectifier circuit,humidity sensor,single stable circuit,Silicon controlled control circuit and so on.Step-down rectifier circuit provides DC voltage VDD=+10V for the whole control circuit.Single stable circuit is composed of IC,wet sensitive network,R5,C1 and so on. When the humidity exceeds the predetermined value,555 ② pin potential is high,555 is reset,the low level output by ③ pin makes the SCR conduct,turns on exhaust fan power To do exhaust to reduce humidity.Emission time is determined by timing time constant R5C1 and the level of control terminals ⑤ pin.Adjust W1 be preset the emission time.



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