Barcode readers read cards which have alternating light and dark bars of varying widths. These bars are read by an optical scanner. The width and spacing of the bars is determined by the bar code protocol used. The advantage of this technology is that it is cheaply produced. This factor, however, also behaves as a disadvantage, mainly because it makes it easy for folks to duplicate real bar codes by photocopying them.
The passport reader reads a piece of magnetic oxide tape which is laminated for the back of your card. This type of card is relatively inexpensive, but is vulnerable to wear, also to be misread. Also, it could be reproduced for fraud, though less easily because the barcode badges.
Weigand readers read cards that have embedded ferromagnetic wires. The ferromagnetic wires a strategically placed to produce an identification number. These cards hold the advantage of not being prone to wear, unlike the barcode and magnetic stripe cards, and they are very difficult to duplicate. Consequently, weigand readers became very well liked at some part. Now they are increasingly being replaced by proximity readers.
A passport reader will not use the weigand technology, though it is still referred to as a “Weigand reader.” The proximity reader radiates a 1″ to 20″ electrical field around itself. When a proximity card is made available to the reader, the electrical field excites a magnetic coil inside card. The coil charges a capacitor, and the capacitor charges a circuit. The circuit provides card number towards the coil, which sends it to your reader.
The last audience the smart reader. These readers contain the latest technology within the form of an imbedded microprocessor and memory. It differs from the proximity card for the reason that the devspky89 function in the microprocessor is to give your reader the identification number. There are two varieties of smart cards: contact and contact-less. A contact smart card has eight contacts, which must touch contacts for the reader. The contact-less smart badges implements the same radio-based technology as the proximity card, except that it operates on a higher frequency. These cards usually do not even have to be used out of your wallet to get read. Smart badges are actually targeted by criminals, who tamper together before they may be sent to customers, stealing numbers and knowledge from them.
These five different varieties of usb magnetic card reader each have their own personal pros and cons. The five types are; Barcode, Magnetic Stripe, Proximity Card, and Smart readers. The card reader may be developed as time passes, with efforts to ensure safety from fraud, and convenience for users.