Development Of The Circuit In Highly Integrated Multi-media Equipment

With the development of technology and the computer technology as the core ofmultimedia technology，is widely used in various fields，especially in the multimediateaching. Multimedia technology as a teaching method is indispensable to modernteaching. Therefore, all colleges and universities, all the schools, have invested a lotof money to build multimedia classrooms. But， both of the lack of understanding ofmultimedia hardware configuration and the dealers’ cheating on sales，prompt thepursuit of fashion, high-grade multimedia hardware configuration.This causes a lot ofwaste of resources and economy. In view of this problem, according to theeconomical and functional view，combined with our college actual situation，andwith extensive research and demonstration，I design an highly Integrated Multi-mediaEquipment. This article will describe the design principle, function and using methodof this highly Integrated Multi-media Equipment in details.This highly Integrated Multi-media Equipment put the equipment circuits,including separate hardware, multimedia central control, audio borne power amplifier,video switch machine, video distributor, microphone and video booth machine of theoriginal multimedia equipment,highly integrated on a circuit board(PCB). The mainbody of its circuit uses a single chip microcomputer89C52, stores and programsstart-up and shut-down infrared remote control code for several models projector. Itscircuit is a kind of monostable delay circuit in the composition of chip NE555. Itsactuators uses relay-control starting system. This highly Integrated Multi-mediaEquipment uses2.4gHZ wireless audio for transmitting and receiving modules. Itsvideo booth uses high-definition digital camera. The advantages of this highlyIntegrated Multi-media Equipment developed by me, compared with the existingordinary multimedia devices, are not only small volume and low cost, but also of thecircuit protection function for forgetting to turn it off.