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#31
06-26-2005, 09:25 PM
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The VF(typ) indicates the typical voltage drop across the LED, VF(max) indicates maximum voltage drop before damage occurs. With a current limiting resistor, an LED will operate at VF(typ) with the resistor dropping the rest of the system voltage. This means that you should calculate your current with an LED voltage of about 2.2V, though the ambers actually operate at 1.95V.
I wouldn't bother with calculating the values with a system voltage of 10.2V, since that is not a normal condition and you have more problems to worry about than the LEDs not being bright enough. I would use a low end of 11.5V and don't forget that the isolating diode drops an extra 0.7V, which is not factored in on that webform. You can comphensate for this by adding 0.7V to the system voltage when using their formula. The problem in your current circuit is that at 13.2V, the LEDs are still dropping only 2.2V, not 3.1V as you're assuming. This means that you're actually running 79ma through each LED. If I were you, I would change out those resistors ASAP, as those are some expensive LEDs if you end up having to replace a bunch of them in the near future. KuoH Last edited by kuoh; 06-26-2005 at 09:38 PM. 
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#32
06-26-2005, 10:28 PM
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Been busy at work. I still have to mail you the title for the SVX.
 Now, it's my turn. 
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Lwin M. Maung (Member # 147) Current SVX: • NONE Previous SVXes: •1994 LE Barcelona Red 107k • 1992 LS-L Pearl White 143k • 1994 LSi Bordeaux Pearl 220k • 1992 LS-L Ebony Pearl 184k • 1992 LS-L Liquid Silver 145k • 1992 LS-L Liquid Silver 102k • 1992 LS-L Ebony Pearl 123k Other current cars:•2001 Jeep Grand Cherokee Black If at first you don't succeed, CHEAT!
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#33
06-26-2005, 10:29 PM
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Quote:
Luxeonstars -- Yeah I know of them. They are the same ones the new Audis use for the front head lights. They are nice. Enough said without giving away too much.
__________________
Lwin M. Maung (Member # 147) Current SVX: • NONE Previous SVXes: •1994 LE Barcelona Red 107k • 1992 LS-L Pearl White 143k • 1994 LSi Bordeaux Pearl 220k • 1992 LS-L Ebony Pearl 184k • 1992 LS-L Liquid Silver 145k • 1992 LS-L Liquid Silver 102k • 1992 LS-L Ebony Pearl 123k Other current cars:•2001 Jeep Grand Cherokee Black If at first you don't succeed, CHEAT!
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#34
06-26-2005, 10:31 PM
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Quote:
Because they are had to find (LED Junkers) and also, they are very exensive
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Lwin M. Maung (Member # 147) Current SVX: • NONE Previous SVXes: •1994 LE Barcelona Red 107k • 1992 LS-L Pearl White 143k • 1994 LSi Bordeaux Pearl 220k • 1992 LS-L Ebony Pearl 184k • 1992 LS-L Liquid Silver 145k • 1992 LS-L Liquid Silver 102k • 1992 LS-L Ebony Pearl 123k Other current cars:•2001 Jeep Grand Cherokee Black If at first you don't succeed, CHEAT!
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