| 摘要 |
An electric fan with a sensor includes a sensor, a control chip, a light control unit, a light sensor and a power control unit. The sensor is connected with the control chip. The control chip is connected with the light control unit. The light control unit includes illuminating devices corresponding to the light sensor. The light sensor is connected with the power control unit. The power control unit includes a power supply. When the sensor is activated and outputs a signal to the control chip which then controls the light control unit to activate the illuminate devices to illuminate. The light sensor sends a signal to the power control unit to change the output of a power supply, so as to vary the speed of the fan.
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