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At 09:15 AM 9/3/2004 -0500, you wrote:
Hi, all. I just returned from Autozone, where I purchased a package of 3
red LED's meant for automotive use. They came pre-assembled with an inline
resistor that has shrink tubing around it, so I can't tell what colors are
on the resistor. My assumption was that since it is made for automotive use,
it might be OK to use for my alternator warning LED indicator?
I don't know what alternator and regulator you are using, but on some cars the warning light was an important part of the circuit. When you would turn the keyswitch to the "on" position, current would flow from the keyswitch, though the bulb, to the regulator to tell it to turn field windings on. If the bulb was burned out, the alternator would not come on. LEDs have a tiny current compared to a bulb. An LED might not flow enough current to turn on the regulator.
Of course, there are many different regulators and many different types of alternator circuits, so this may not be an issue for you.
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