Abstract
This circuit can be installentrance in the market, hotel, dance hall and so on. It use infrared examine technology to distinguish the direction of guest coming and coming out automatic. When gust comes in, it says welcome presence, meanwhile, the module can make action of bent waist and put out hand. When gust comes out, it will say thank presence, meanwhile , above making same action. The pronunciation circuit sending out voice can give person joyful and cordial impression. Moreover, mood and weather temperature can’t affect the equipment. It give same cordial to gust. Strengthen the favorable impression of customer to department. And improves the department reputation . It will become a automatic welcoming guest lady with no person on duty. Using this equipment to replace welcome guest lady, it is not only economic but also interesting. The work principle of automatic electron welcoming guest circuit is shown in attached diagram. It consists of infrared oscillator IC1, infrared receiver D5 and D6, mutually locks single stable state trigger U12A and U12B. and pronunciation storage IC6, IC7 IC1 is a single time integrate circuit NE555 .Connect as non-stable state multivibrator pattern, its oscilation frequency determined by R11, R9, C1 generally according to f=1.443/[(R9+R10+R11)C1].
Key words: welcoming gusts of electron,The pronunciation module,Emission of infrared radiation,The infrared receive
