Traditional Culture Encyclopedia - Hotel accommodation - Hotel slot lamp
Hotel slot lamp
Switch parallel connection
Problem analysis: according to the meaning of the question, only when the room card is inserted into the slot can the lights and sockets in the room have electricity. On-off control circuit is equivalent to connecting the switch to the main road, and the lights, televisions and other electrical appliances in the room are connected to the lighting circuit in parallel and do not affect each other.
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