Optically Isolated Phase Controlling Circuit

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  1. - 18th July 2009, 22:46 #3
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    dhanush
    dhanush is offline Junior Member
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    Quote Originally Posted by Melanie View Post
    In your version, what is the point of the H11L1 opto?
    I cant understant what u r asking. Point means? Please explain your question.

    I am going to develop this circuit for fan regulator and it is not for one, i want to attach upto 25 fan regulator by adding same circuit (after optoisolator) again. So i am scare about lightning, thats why i am using optoisolator with transformer (not directly connect to main supply). This project is developing for large office purpuse.

    And please mention, what transistor I need to use for trigering upto 25 LM555 IC, instead of MPSA40. Is MPSA40 have enough current for trigger pin of LM555, if I attach 25 LM555. I am not an expert please help.
    Last edited by dhanush; - 18th July 2009 at 22:52.
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