How to crack the hotel card to get electricity and ensure that the room can use electricity normally when the card is pulled out?

Generally, any card inserted in a hotel can be powered on, and sometimes a piece of paper can be inserted. It is only an induction device and should not have the function of reading and verifying information cards.

Plug-in switch

Plug-in card power switch, also known as power switch, energy-saving switch, energy-saving switch. Mainly used in hotels and guesthouses. When the room is vacant, cut off the power supply to the room. So as to realize electricity safety and energy saving.

Chinese name

Plug-in switch

kind

Power switch, energy-saving switch, energy-saving switch

use

Hotels, guesthouses

superiority

Electricity safety and energy saving

Circuit principle

Card power switch is generally composed of high and low voltage power conversion part, identification card part and output part. Among them, there are many ways to convert power supply, such as switching power supply, resistance-capacitance step-down, transformer and so on.

The high-low voltage conversion part reduces alternating current to DC low-voltage power supply through rectification and provides it to the identification part and the output part.

The part of identifying the card is to check whether the inserted card meets the preset standard (mainly the second-eighth * * * 6 methods introduced above).

The output part gets the standard signal of the identification card part and turns on the AC power supply (live wire). According to different load requirements, this part includes 30A, 40A, etc.

Color development method

The development process of power take-off switch is synchronous with hotel lock, because it needs a door-opening card to get power, so the power take-off switch must match the type of door-opening card of hotel lock.

1), mechanical power switch: the early power switch was actually a mechanical rocker switch, which connected two contacts of the power supply by inserting a key card. In this way, when the guest leaves the room, the contacts are disconnected, the power supply of the room is cut off, and the key card is taken out. Hotel guests who are familiar with this principle can sometimes get electricity by inserting a hard object like a key card, such as a comb, so the safety and energy saving of electricity cannot be fundamentally solved. It has almost been eliminated at present.

2) Photoelectric switch: With the appearance of magnetic card hotel lock, only one magnetic card is needed to open the door to get electricity, and the photoelectric switch appears. Its principle is that a pair of infrared rays are turned on or off through the card, and the control circuit detects the turn-on and turn-off of infrared rays, and outputs power through the relay. The power switch of this principle is also called universal power switch. There are still a few hotels using it.

3) IC card power switch: it is mainly suitable for supplying power through contact IC card, and mainly detects the chip pin of IC card to judge whether the card is inserted or not, and whether the IC card is inserted into the output power supply. At present, the market share is also relatively small.

4) Low-frequency card power switch: it is suitable for 125KHz contactless induction cards, such as EM, TEMIC, TI and other induction cards, and mainly detects whether the card frequency meets the 125KHz output power supply. At present, the market share is relatively large.

5) High-frequency card power switch: it is mainly suitable for 13.56MHz high-frequency induction cards, such as S70 and S50 of MIFARE and Fudan card made in China. , and output power by identifying whether the ID of these cards meets the standard. It is widely used in the market at present.

The above five types are all used to identify the types of door opening cards.

6) Identify the room number type power switch: it is one of the special switches for special cards. By reading the room address data in the door-opening card, compare whether it is the card output power supply of this room. A few hotels use it. You need to share the card data with the hotel lock.

7) Time-identifying power-on switch: it is one of the special switches for special cards. By reading the room address and time data in the door-opening card, it is compared whether it is a card within the effective time of the room to output power. A few hotels use it. You need to share the card data with the hotel lock.

8) Network-type power switch: the data such as the permission type and time of the door opening card are read and uploaded to the guest control system, and the guest control system executes the power consumption status of the guest room. High-star hotels use it more. Need to share card data and transmission protocol with hotel lock and guest control system.