Breeze ceiling fan temperature controller circuit composed of the NE555

Published:2011/6/28 3:16:00 Author:Rebekka | Keyword: Breeze ceiling fan, temperature controller | From:SeekIC

When environment temperature increases, the resistance of the corresponding R7 R6 become smaller and make the IC (2) feet down to less than a third potential VDD and it is reset, 3 feet output high level. So the controlled silicon AC zero-voltage switching composed of D2～D5、SCR、BG1、BG2 will be turned on. Fan D operates when supply power is open; When the environment temperature falls, resistance of the corresponding R7, R6 changes, 555 is reset because the feet (2) is larger than a third potential VDD, (3) feet outputs low level, so that the controlled silicon AC zero-voltage switching is closed. The electric fan D stops because the power supply is closed.



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