Abstract
This system use STC89C52 as to control core ,and make use of the
PT2262/PT2272 chip to be code and decode , , the ASK amplitude modulation which adopts to send a far 315 MHZ blast-off frequency, but receiver use the super regenerative reception electric circuit, this system combines single slice machine to establish a password, making it have a double insurance, and can show by a LCD manifestation, and can shut a lock through a position sensor, and make use of an infrared ray examination, carry on voice warning, and carry on the segment of recording with the ISD1420, and carry on a voice hint .This system take a programme interface, make the system be able to upgrade at any time, and the system adopt the mold piece design, and reserve many interface, so this system can accommodate more sensors, carrying on an intelligence control to link with network, so this system have a good applicability, can satisfy a different customer request.
Keywords: send and receive by wireless STC89C52 voice hint coded lock show by a LCD