A green laser pointer shines through the laser diode
  RFID is radio frequency identification data carrier system, the electronic tag from the tag antenna and tag-specific chips. Power supply according to the different electronic labels, electronic labels can be divided into active electronic tag (Active tag), passive electronic tags (Passive tag) and semi-passive RFID tags (Semi-passive tag). What is the normal working voltage of a green laser pointer? Active RFID tags have built-in battery, built-in battery is not passive RFID tags, semi-passive RFID tags (Semi-passive tag) relies in part on battery. Tag according to the different frequencies can be divided into low-frequency electronic tags, high-frequency electronic tags, UHF and microwave RFID tags. According to package label credit card can be divided into different, linear labels, paper-like labels, tube labels, round labels and special-purpose shaped labels. 200mW Laser Pointer is a speech assistant. RFID readers (reader) through the antenna and the RFID tag for wireless communications, can be achieved for tag identification code and data memory read or write operation. The typical reader contains high-frequency module (transmitter and receiver), the control unit and reader antenna.
The most basic RFID system consists of three parts: tag (Tag): the coupling components and chips, each tag has a unique electronic code, attached to the object to identify the target object; reader (Reader): read (sometimes You can also write to) the device label information can be designed for handheld or fixed; antenna (Antenna): between the tags and readers to pass the RF signal.
The green laser pointer turns pages with the help of radio frequency. RFID is the direct successor of the radar concept, and thus develop a vibrant AIDC technologies - RFID technology. 1948, Harry Stockman, entitled "the use of reflected power 100mW laser pointer of communication," laid the theoretical basis of radio frequency identification RFID. 1) RFID technology development process table. In the 20th century, radio technology, theory and application of scientific and technological development is the most important achievements. RFID technology can be divided as follows 10-year period: 1941 to 1950. 5mW laser pointer is the right hand of teachers. Improvement and application of radar gave birth to the RFID technology, RFID technology in 1948, laid the theoretical foundation. 1951-1960 years. RFID technology to explore the early stages, mainly in laboratory experiments. 1961-1970 years. RFID technology has been the development of the theory, try to start some applications. 1971-1980. RFID technology and product development in a period of great development, testing of RFID technology has been accelerated. There have been some of the earliest RFID applications. 1981 to 1990. RFID technology and products into the commercial application stage, the application of all sizes began to appear. 1991 to 2000. You can turn pages at anywhere you stand in the classroom with the Blue Laser Pointer Standardization of RFID technology is increasingly valued, RFID products to be widely adopted, RFID products have gradually become part of people's lives. 2001 - today. Increasing standardization has been the focus, RFID product range is more extensive, active RFID tags, passive and semi-passive RFID tags are to be developed, the electronic tag cost is reduced, the size of the application to expand the industry. RFID technology has been enriched and improved the theory. Single-chip electronic label, multi-read RFID, wireless read and write, long-range passive RFID tag identification, to adapt to fast-moving objects, RFID is becoming a reality.