1992 e36 318is-What diodes? "running lights"

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  1. 1992 e36 318is-What diodes? "running lights" 
    #1
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    Forgive me for being thick, electrics aren't my strong point..

    I wish to have the US style "running lights" in the front indicators on my car. I could quite easily lengthen the old sidelight wiring and have them come on whenever the lights are on. However I want them on a switch so they don't have to be on all the time. I want to use my foglight wiring as I don't have fogs anymore. I understand I'll need some diodes to bring the voltage down (so they're not bright as fook), but what diodes? I've not got the foggiest idea what type I need, help!
     
     

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    Resistors no diodes.


    Resistors provide a resistance to current flow. Your instrument light dimmer is a variable resistor for example.

    Diodes only let current flow one way. LEDs do it with the added benfit, in the right circumstances, of emitting light.

    Ignore zener diodes.




    No offence but the sidelight bulbs are in your sidelights and have a switch already

    http://ledcalc.com/


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    Quote Originally Posted by E36Coupe328 View Post
    Resistors no diodes.
    Told ya I don't have the foggiest...

    Do you know what sort I would need?
     
     

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    Do you want a Variable one (you can adjust the brightness)? or a non variable one?

    Driven by experience and pleasure
     
     

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    Quote Originally Posted by Dez-Derek View Post
    Do you want a Variable one (you can adjust the brightness)? or a non variable one?
    Not really fussed about adjusting the brightness tbh
     
     

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    Are you just doing the fronts?


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    Quote Originally Posted by E36Coupe328 View Post
    No offence but the sidelight bulbs are in your sidelights and have a switch already
    Hah, they're not actually..

    Quote Originally Posted by E36Coupe328 View Post
    Are you just doing the fronts?
    Yep.
     
     

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    loved it on my old one especially the ambers

    might do it on mine when i get my new set of ambers
     
     

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    Been googling, very confusing and still don't know what I need. Found out diodes do lower the power slightly and I could use a number of them to get to the desired level. Or use a resistor but these get very warm apparently...mmmmm
     
     

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    Quote Originally Posted by Disco Stu View Post
    Been googling, very confusing and still don't know what I need. Found out diodes do lower the power slightly and I could use a number of them to get to the desired level. Or use a resistor but these get very warm apparently...mmmmm
    Diodes cause a voltage drop which has a nock on effect to current flow but won't save them.

    I put a link in the post higher up that tels you all you need if you just take the time to put in the value of diode you want.




    As for resistors getting warm they are rated for their power handling so use too low a power and they get too hot and break down. Use too high a power rasting and you spend a penny or two extra with no down sides


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