Locks have usually been of the mechanical deadbolt variety and that has provided security for years. But people are constantly finding ways to better things with technology and locks are no exception.
Electronic locks on home and businesses are deadbolts, but allow keyless entry. But, unlike mechanical deadbolts, the electronic lock uses radio wave frequencies, infrared or a key sequence to allow the user to open it.
Rolling code technology is often used by many of the radio wave locks. This requires the user to have a remote control that sends the radio waves to the lock. Rather than having one set code, the technology changes the operating code after every unlock with up to four billion different codes. These systems can be used on houses or more commonly on cars to allow keyless remote entry.
Infrared locks are used primarily in hotels. You may notice not when you rent a hotel room, you don't get a key, but a card that looks similar to a credit card. This card is programmed to work with the infrared lock on your room door. When you slide the card into the slot, a sensor in the slot reads the card. Then, if the card is programmed correctly to open that particular door, a green light appears and the lock is unlocked. If the card is programmed incorrectly or if you insert the card into the wrong door slot, a red light will appear to let you know the lock has not been unlocked. When you check out of the room, the slot and card are reprogrammed to another code for security reasons.
A key sequence lock is sometimes used on homes or cars. For the key sequence lock, you have a set of numbers you must enter before the door will be unlocked. In essence, it is much like a combination lock in that the key sequence is the same unless reprogrammed by a locksmith.
Copyright © 2005 - 2013Wholesale-electronics.tv