Barcode Readers read cards which may have alternating light and dark bars of varying widths. These bars are read by an optical scanner. The width and spacing in the bars is determined by the bar code protocol used. The advantage of fractional treatments is that it is cheaply produced. This factor, however, also provides a disadvantage, because it makes it easy for people to duplicate real bar codes by photocopying them.
The card dispenser reads a bit of magnetic oxide tape that is certainly laminated on the back of the card. This type of card is fairly inexpensive, but is vulnerable to wear, and also to be misread. Also, it is usually reproduced for fraud, though much less easily because the barcode badges.
Weigand readers read cards that have embedded ferromagnetic wires. The ferromagnetic wires a strategically placed to generate an identification number. These cards contain the advantage of not being vunerable to wear, unlike the barcode and magnetic stripe cards, and they are very difficult to duplicate. Consequently, weigand readers became extremely popular at one point. Now they are replaced by Proximity readers.
A passport reader will not use the weigand technology, although it is still known as a “Weigand reader.” The proximity reader radiates a 1″ to 20″ electrical field around itself. When a proximity card is given to the reader, the electrical field excites a magnetic coil inside card. The coil charges a capacitor, and the capacitor charges an integrated circuit. The circuit increases the card number to the coil, which sends it to your reader.
The last reader is the smart reader. These readers have the latest technology inside form of an imbedded microprocessor and memory. It differs from the proximity card in this the devspky89 function from the microprocessor is to give the various readers the identification number. There are two kinds of smart cards: contact and contact-less. A contact smart card has eight contacts, which must touch contacts about the reader. The contact-less smart badges implements the identical radio-based technology because proximity card, apart from it is run on a higher frequency. These cards usually do not even have to be utilized out of your wallet being read. Smart badges are actually targeted by criminals, who tamper with them before they may be sent to customers, stealing numbers and data from them.
These five different forms of magnetic card reader each have their unique pros and cons. The five types are; Barcode, Magnetic Stripe, Proximity Card, and Smart readers. The card reader has been developed after a while, with efforts to ensure safety from fraud, and convenience for users.
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