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q12

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Posts posted by q12

  1. here
    i used this circuit. 
    But i have some trouble from Q1 and Q2. they are super heat up.
    I put on them some  heaters/radiators  but still they are warm.
    finaly i reach to conclusion that they need a fan. 
    and they are steady finaly (from over-heat point of view).

    i try to put some resistors on base or colector but the current flow are seriously diminish.  the motor not run.
    i use BD 441  NPN-transistors and they hold out 80V and 4A.  i think this kind of transistors are much over the circuit requirement (they are very good). still they are heat.
    in my opinion i think they heat because they are over-feed whith V or A  because they are first in circuit.

    if you have an response to how can i exclude the over-heat from Q1 and Q2  i will be thankful. 

  2. >:( >:( >:( >:( >:( >:( >:( >:( >:( >:( >:( >:( >:( >:( >:(  if you dont see the image below click on the link or download the .rar  arhive of my photo.  k?  :P

    ' alt='' class='ipsImage' >
    it means if you Touch the led emited Light the Switch will open/close the Light in my room.
    BUT. it not work.
    My blue led is damaged from unknow couses, if i put-it like in this image. ' alt='' class='ipsImage' >
    in time he iluminate and the ideea work.

    If i  put a led from 220v, it is not bright enough to iluminate the LDR.
    i am disperate.
    what can i do to make it work? i mean not to damage itself / or/ iluminate enough .
    i think it may be necesarily to overplan the concept. --  redraw-it.
    maybe the on-off part shoud consuming a litle  I or V.
    if you have an ideea grab photoshop and draw-it corect.
    thank you  and excuse-me for my poor english.  :'(

    intrerupator_optic1_.rar

    post-20620-14279142881169_thumb.jpg

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