ccpit-hlj.com gives knowledge about different types of home security systems, security devices, various kinds of locks and security cabinets and also provides information about the basics of home safety and security.

A keycard lock is a lock controlled by a keycard, a flat, oblong plastic card with matching dimensions to that of a card or driver's license which stores a physical or digital signature that the door mechanism accepts before disengaging the lock. There are a few well-liked sort of keycards in use including the mechanical holecard, barcode, magnetic stripe, Wiegand wire inserted cards, smart card (inserted with a read/write electronic microchip), and RFID vicinity cards. Keycard systems control by physically moving detainers in the locking mechanism with the insertion of the card, by shining LEDs through a pattern of holes in the card and finding the result, by swiping or inserting a mag stripe card, or in the case of RFID cards, just being brought into spitting distance to a sensor. Keycards might also serve as ID cards. Many electronic access control locks employ a Wiegand interface to attach the card swipe mechanism to the remainder of the electronic entry system.

Types: Mechanical keycard locks employ detainers which has to be prepared in pre-selected positions by the key before the bolt will move. This principle was the base for the first known mechanical holecard operated lock. This was a mechanical sort of lock controlled by a plastic key card with a pattern of holes. There were thirty two positions for possible hole locations, giving up to two raised to the power of 32 = 4.2 bln different keys. The key could be modified for each new guest by inserting a new key template in the lock that matched the new key. Back in 1980s the key card lock was electrified with LEDs that noted the holes. Magnetic strip (occasionally "stripe”) based keycard locks function by running the magnetic strip over a sensor that reads the contents of the strip. The strip's contents are matched against those either stored regionally in the lock or those of a central system. Some centralized systems operate using hard wired connections to central controllers while others use numerous frequencies of radio waves to speak with the central controllers. Some have the feature of a mechanical bypass in case of loss of power.