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  1. #21

    or simply, you can just use a..



    as posted by werty.

  2. #22
    Quote Originally Posted by stealthghost View Post
    try this...



    ipa-double check nalang sa mga electronic stores, preferred Teknika sa Jakosalem.. naa permi ang tag-iya nga Licensed ECE.
    Hagtus ni!...

    Stealth, sa configuration sa imong switch transistor naay problema. If sulayan na nimo either ma busted imong transistor or ang imong PSU.

    Imo gi direct ang 5V sa base sa transistor (NPN), Just remember if the transistor will saturate or in active mode Base Emmiter Voltage will be .7V for silicon. I'm sure short jud na imo 5Volts cause common emmiter mani ang configuration.

    Useless ang 1K nga resistor nga imong gi butang.

    Correction lng..
    Last edited by moklo; 09-04-2010 at 01:23 PM.

  3. #23
    Aron dili kaau gasto gasto...hehhehe!..


    or e parallel lng kaya na sa imong 1st psu ang Green ug Black aron ala ka probs..
    Last edited by moklo; 09-04-2010 at 10:57 AM.

  4. #24
    nosebled mn q aning mga butanga sir,. . hehehe

  5. #25
    Pwede sad kung ganahan ka mo gamit ug relay ayaw nlng butangi ug transistor e dritso nlang na ang relay sa 12v nga output sa 1st PSU mao ra gawasa.

  6. #26
    Quote Originally Posted by moklo View Post
    Hagtus ni!...

    Stealth, sa configuration sa imong switch transistor naay problema. If sulayan na nimo either ma busted imong transistor or ang imong PSU.

    Imo gi direct ang 5V sa base sa transistor (NPN), Just remember if the transistor will saturate or in active mode Base Emmiter Voltage will be .7V for silicon. I'm sure short jud na imo 5Volts cause common emmiter mani ang configuration.

    Useless ang 1K nga resistor nga imong gi butang.

    Correction lng..

    sir pwede ask q unsa gamit sa transistor ug sa relay? salamat,. .

  7. #27
    @moklo, tnx sa correction..

    I'm thinking ana nga setup is mura'g switch nga among gamitun sa microcontrollers namu sauna..



    Uploaded with ImageShack.us

    [edit]
    Sayup jud d.i.. wa na d.i unta gi-ground ang 1K sa digram akong gi-hatag... ^_^ open man d.i ang padung sa ground...

    @kent, Relay is a mechanical switch activated by applying voltage across the coil.. naa na'y Electronic Relay but mahal..
    Transistor, can be used as an electronic switch.
    Last edited by stealthghost; 09-05-2010 at 12:46 AM.

  8. #28
    can i know why?

  9. #29
    Quote Originally Posted by stealthghost View Post
    @moklo, tnx sa correction..

    I'm thinking ana nga setup is mura'g switch nga among gamitun sa microcontrollers namu sauna..



    Uploaded with ImageShack.us

    [edit]
    Sayup jud d.i.. wa na d.i unta gi-ground ang 1K sa digram akong gi-hatag... ^_^ open man d.i ang padung sa ground...

    @kent, Relay is a mechanical switch activated by applying voltage across the coil.. naa na'y Electronic Relay but mahal..
    Transistor, can be used as an electronic switch.
    No probs bai, ang problema lng jud sa imong diagram is ang imong 5Volts gi dritso sa base sa transistor without resistor ang problema ana is low resistance man ang Base to Emmiter unya ang emmiter ground man so tabla ra imong gi short ang imong 5Volts. Imo jud na butangan ug resistor aron mo limit sa current kung mo saturate na imong trnsistor.

  10. #30
    Quote Originally Posted by kent213 View Post
    sir pwede ask q unsa gamit sa transistor ug sa relay? salamat,. .
    actually wala na na gamit ang relay kung ingon ani lang nga setup ang imong buhaton. Ang relay gigamit na diha as high current switch unya ang nag pa activate ana is ang transistor. Aron ma activate sad ang transistor kinahanglan ka ug signal aron e input sa base small current ra jud ang kinahanglan aron ma activate ang transistor.

    Unya dili man high current ang atong gina switch ON like aning Green pin sa PSU. Ang gusto lng jud sa PSU aron ma ON siya is kinahanglan e close ang green pin to ground ug mao nay gitawag na "ACTIVE LOW" so no need na jud untah mo gamit ug relay ani kay soft start rman ni.

    http://wiki.answers.com/Q/What_is_me...tive_low_input'
    Last edited by moklo; 09-05-2010 at 11:49 AM.

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