| 摘要 |
<p>A timing power switch includes a power module for getting and dealing with an AC input voltage, a switch module having an electromagnetic relay and a driving circuit, and a control module which includes a microcontroller having a plurality of specific time span of time values preset therein, a power unit regulating an output voltage of the power module and then providing a work voltage for the microcontroller, and a time control switch connected with the microcontroller for making choice of one time value so as to drive the microcontroller to send out corresponding control signals by means of counting down the time value selected by the time control switch. Then the driving circuit controls switch states of the electromagnetic relay according to the control signals, so as to further control whether there is power output to an external electric appliance or not.</p> |
