LED Door Reflectors
03-09-2007, 02:25 AM
#21
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Originally Posted by usmanasif
Paul, I have a question. Since most LEDs are 3-3.3v, most people prefer connecting them in series of 4 so as to avoid needing a resistor since the combined voltage needed equals the voltage provided by the battery. You still used one, though. Why? I am confused.
In a best case scenario you would use individual resistors on each LED, so that there is no effect if one happens to burn out (slim chance).
03-09-2007, 03:23 PM
#23
Originally Posted by KPierson
You should always use a resistor with an LED, as it will limit the current, and protect the LED. A cars electrical system is prone to voltage spikes and dips, and isn't stable at all. Using a resistor will provide some protection from spikes by limiting the current, and thus protecting the LEDs.
In a best case scenario you would use individual resistors on each LED, so that there is no effect if one happens to burn out (slim chance).
In a best case scenario you would use individual resistors on each LED, so that there is no effect if one happens to burn out (slim chance).
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