Five-speed fan speed control circuit with light control
Source: InternetPublisher:smallembedded Keywords: Light control speed regulating circuit Updated: 2021/02/08
The five-speed speed regulation circuit of an electric fan (ceiling fan) is shown in Figure 3-6. It uses capacitors to step down the voltage, 7806 three-terminal fixed integrated voltage
regulator Ai to stabilize the voltage, and controls the conduction angle of the triac V through the LC906 integrated circuit A2 to realize the speed regulation of the electric fan. Sequence
Press button SB. The 4th pin of A2 will press 1st gear - 2nd gear - 3rd gear - 4th gear - 5th gear - off - 1st gear... and the cyclic changes will send out a
control signal to make the V's conduction gear smaller and achieve speed regulation.
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