Two situations, need help on both.

[tunedparts]

I have some led rings that I had made, they come with 3 leds per one resistor on a board, they should have shown up with a 271 resistor per each three on the back, but they didn't and the resistor is way too low, 151 if I remember correctly. There are 21 resistors per ring, is there any way I can wire something in line when installing these in an AUTOMOTIVE application so they can run just fine and I run zero risk of a spike and the ring or segments blow out?

Second issues I have is even at 271 which we call out for, we seem to have random issues of 3 leds flickering inside the headlight halos, I would like to build some sort of buffer so this doesn't happen anymore, any thoughts?

I can provide more info if needed, this forum is new to me and so is asking for technical advice.

David

 

[Optical Inferno]

An LED driver setup would probably be what your looking for, as it would help with the voltage fluctuation i the automotive charging system. Have a look at National, or TI drivers for quick designs that would probably work.

From your description I hope that you are not trying to make your own exterior lighting...if you do, get it tested so it becomes legal.