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  1. 29-09-2014 #3
    EddyCurrent's Avatar
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    EddyCurrent
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    Quote Originally Posted by irving2008 View Post
    Alternatively could use a 43v zener diode like this which might actually be cheaper since can be bought 1 off whereas resistors generally need to be bought 10 off. When using the zener the end with the band goes to the + side of the supply. Get it the wrong way round and both zener and LED will fry faster than you can say magic smoke!
    Irving, good idea using zener but should the connection go like this ?

    supply +ve to lamp +ve
    banded end of zener to lamp -ve
    plain end of zener to supply -ve
    Last edited by EddyCurrent; 29-09-2014 at 04:05 PM.
    Spelling mistakes are not intentional, I only seem to see them some time after I've posted
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