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Thursday 4 February 2016

Automatic Teller Machine

Automatic Teller Machine


Automatic teller machines, also known as ATM, Automatic Teller Machine is an abbreviation, meaning the ATM, because mostly for withdrawals, known as ATMs. It is a highly sophisticated mechatronic system, using a magnetic card or smart card code to implement self-service financial transactions, instead of working bank counter staff. Can withdraw cash, deposit balance inquiries, transfer of funds between accounts performed, balance inquiries and other work; can also be a cash deposit (recorded in real time), check deposit (domestic None), passbook retro, intermediate business and so on. Cardholders can use credit or debit card, according to password handling automatic withdrawals, balance inquiries, transfers, cash deposits, passbook retro, purchase funds, change passwords, and other services to pay the phone bill.

In 1939, LutherGeorgeSimjian invented the ATM machine. However, the automatic teller machines in the modern sense, the concept was put forward in 1968, the prototype appeared in 1969. The first automatic teller machine was installed at Chemical Bank in New York. Today, the speed ATM machine developed quite fast, the ratio of banking institutions reached a 4: 1. Navy even loaded into the ATM machine on the warships.

Automatic teller machines - ATM use

1. To bank card magnetic stripe down the side of the insertion magnetic stripe ATM machine right

2. If you have some tips about the text on the screen according to the "confirm" can the "OK" button in 4 or 8 key place

3. After entering the card after the password is entered directly into the ATM screen and some can and some also need to press the Confirm 4 key or the 8 key

4. After you can see on the screen "Queries" "withdrawals", "Transfer", "back card" and select the corresponding button is that eight key sub you must not hurry to see the next option and press the corresponding key child

5. Press the "withdrawal" after you enter the amount you want to withdraw if there is a convenient on-screen prompts such as: 1000 yuan 800 yuan 500 yuan, etc. If top with the amount you want to withdraw money, you can press the corresponding button on it if there is no after you find an "other amount" after pressing can freely enter the amount they want to enter the amount taken up by confirmation

6. At this time the eyes must be focused on the "out of money mouth" 2-5 seconds out of money after the money if no one takes Tunhui Dispenser ATM withdrawals will certainly find a suspicious banknote counting banknotes put crown word take the bill number after aligning ATM camera more slowly moving back and forth for a few seconds so you can make the camera recording to an optimal distance after going to the bank to identify if it is counterfeit complaints! If subsequently found there would be no way

7. After the withdrawal can be further withdrawals can also query

8. If you do not want to continue to operate the on-screen prompts to press "back of the card" Exit Card.

Sunday 3 January 2016

Photo resistance

Light Dependent Resistor


Photo resistor  also known as the photosensitive resistor (photo resistor or light-dependent resistor, which is abbreviated as ldr) or light guide (photo conductor), commonly used in the production of materials for the cadmium, in addition to selenium sulfide, aluminum sulfide, lead and bismuth sulfide and other materials. The production of materials under irradiation with light having a specific wavelength, its resistance decreases rapidly characteristics. This is because the carriers are involved in conducting the light produced in the applied electric field drift motion testimony, the positive power electronics toward the hole toward the negative power supply, so that the light-sensitive resistor values to decline rapidly.

Photo resistor is a resistance value of the strength of a photo conductive effect using a semiconductor made with the incident light changing resistors, also known as a photo conductive detector; incident light intensity, the resistance is reduced, the incident light is weak, the resistor increases. Still another of the incident light is weak, the resistance is reduced, the incident light intensity, resistance increases.

Photo resistor are generally used for measuring light, light control and photoelectric conversion (to change light into electricity changes). Conventional photosensitive resistor CdS photo resistor, which is made of a semiconductor material. Photo resistor light sensitivity  and visible light (0.4 ~ 0.76) μm of the response of the human eye is very close, as long as the human eye can feel the light, will cause its resistance changes. When designing the light control circuit, all with incandescent bulbs (small bulbs) light or natural light for controlling the light source, so that the design greatly simplified.