Second Signal Generating

The Circuit Diagram of Hepatitis Virus Sterilizer Controller Consists of 555

Published:2011/8/8 21:48:00 Author:Felicity | Keyword: Hepatitis Virus Sterilizer

As button AN pressed, the potential transformer B is on and 555 is set because pin 2 is low. And the high voltage output by pin 3 makes contact J1-1 of relay J close and the power voltage is self-hold. Then C1 is charged through W1, R1 and while the voltage reaches 2/3 VDD, 555 reset, and the Contact J1-1 of Relay J releases because the low voltage output by pin 3. And the power is off. And the delay time ,td=1.1(Rw1+R1) C1 ,of 555 is the sterilizing time, which can be adjusted by adjusting W1.   (View)

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Eliminator of Visual Fatigue (the 2nd)

Published:2011/5/22 9:32:00 Author:Felicity | Keyword: Eliminator of Visual Fatigue (the 2nd)

Work of the circuit The circuit consists of shining diode V, resistor R1-R4, potentiometer RP, capacitor C, switch S1, S2 and battery GB (I t is showed in picture 9-58.). When we use the machine we should put it exactly in front of our eyes (the distance should be about 25cm). We look at distance place and when VL shines (2s) our eyes will look at the shining point naturally. When VL stops shining (6s) we should look at the distance place again. In this way can we eliminate fatigue.   (View)

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Eliminator of Visual Fatigue (the 1st)

Published:2011/5/22 9:30:00 Author:Felicity | Keyword: Eliminator of Visual Fatigue (the 1st)

Work of the circuit The circuit consists of pulse generator, counting frequency divisor and LED indicating circuit (It is showed in picture 9-57.). Put four shining diode on the pad symmetrically and the distance between two diodes should be about 30mm. when the eyes are tired they will flex with the shining of the diodes. In this way can the user eliminates the visual fatigue.   (View)

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