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Switching can be defined as the change in state whether it be an analog, digital, or mechanical device. For digital devices, switching can be defined as a transition from HIGH to LOW or vice versa. For analog devices, switching can be defined as a change of operation within a transistor. Mechanical device examples include physical light switches or button switches. Ultimately, switching interrupts current from going into another conductor path.

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Remaining circuit 220Vac

I am newbie, I am looking for a circuit that remaining power for about 5 minutes after switch off the main switch of a 25W fan at 220Vac. Thank you in advance.
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