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Old 01-29-2010, 11:16 PM
Billybob Billybob is offline
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Join Date: Nov 2001
Location: Cape Cod Massachusetts
Posts: 1,427
Quote:
Originally Posted by tinypanzer View Post
Yeah, I forgot it was a dimmed circuit. You actually can dim LEDs quite a bit, but at some point they just cut off. LED dimmers actually work by pulsing the voltage to the LED instead of reducing it.

So, your points are quite valid. The dimming will work to a point, then it will just shut off.

Although, with a resistor in series with the LED, you get your current drop when you dim the voltage. Trying to get the right value resistor might be a pain. Perhaps bench test with a potentiometer to find the sweet spot?

Y'know..... The easiest thing to do might just be go to Pick n Pull and grab one. I've got several of them and I don't think I was charged for any of them.
The problem with LED is its operational range of the voltage between V min and V max is quite limited, the current is a function of voltage divided by resistance, with the resistance constant (inline resistor) and the voltage variable (the swing between high and low interior illumination voltage) only over a small range, the resultant variation in current which determines the output of the LED is almost unnoticeable.
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