Hotel nightlight closes itself during the day and opens itself at night. How did it happen?

1. Using the characteristics of photoresistor, it is added to the control circuit of the lamp. When the strong light appears and lasts for a certain period of time, the circuit automatically controls to cut off the power supply of the light, just like the voice-activated switch in the corridor of a residential building. It will lose its function when there is strong light during the day, and it will work when there is no strong light at night.

2. Use the time relay, that is, the electrician adjusts the downtime in the morning and the startup time in the evening in advance in the time relay, so that he can work or disconnect at that time. This is the same as the street lamp control in the community.

3. The console is controlled by computer. These lights are added to the central control system, and the computer customer service can turn them on or off in time according to the usage of the room without entering the room for operation. The computer can also do a lot of actions at the same time, and the control is simple and convenient.

Extended data:

1. When staying in a hotel, first check whether the hotel orientation matches your five elements.

Suppose a person likes the east and avoids the west, the hotel is in the west, and the gate faces the west, then the gas field will definitely be bad after checking in. If it's a business trip, it means losing a game first.

2. you can't open and close the door immediately when you stay in the hotel.

Open the door when you check in at the hotel. Never close the door as soon as you enter the room. Knock first, then open the door. Leave the door open for about a minute. People stood on one side of the door and then entered the room later.