The 555 multi-functional ceiling fan controller circuit

Published:2011/5/28 21:24:00 Author:Borg | Keyword: multi-functional ceiling fan | From:SeekIC

The fan control method is classified into three ways that are direct, interval and timing. In the interval state, 555,R2,R3,RP1,C2,R7,C3 and so on consists a non-steady multi-resonate oscillator, before the charging voltage reaches the trigger LEV(2/3VDD), the 3-pin of 555 is in a high LEV, VT1 is conducting, the relay J pulls in, the fan gets power and starts to run, the running time is determined by R2,R3,RP1 and C2, in the figure, the corresponding time to the parameters is around 25~60s. The interval time means the period after 555 is reset, and C2 discharges(with the help of R7) to the the trigger LEV of 2-pin(1/3VDD), the time span corresponding to the parameter in the figure is about 20s.



Reprinted Url Of This Article:
http://www.seekic.com/circuit_diagram/Signal_Processing/The_555_multi_functional_ceiling_fan_controller_circuit.html

Print this Page | Comments | Reading(3)