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Simulated natural wind fan control circuit accompanied by th

2015-03-02 22:16  
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Simulated natural wind fan control circuit accompanied by the waves sound
It consists of a variable frequency multivibrator, relay control circuit, analog waves sound circuit and AC buck rectifier circuit. Ordinary fan is configurated with the control circuit which can allow wind to be strong or weak and accompanied by realistic sound of the waves. People will have natural feelings when they are enjoying the cool wind. VT1, VT2, C1, C2, R1~R3 and RP1 form a multivibrator.