SparkFun Electronics - LED Light Bar

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LED Light Bar - Tri-Color

sku: COM-00697

Description: The LED Light Bar is a pre-packaged strip of 3 high-output Tri-Color LEDs powered by 12VDC. We don't have specifics on the output luminocity, but take a look at the example GPS Wall Clock project to get an idea. Each unit comes with a fully assembled and tested PCB with current limiting resistors, a wall-mount holder (backed with double-stick tape), and a connection cable. Each LED Light Bar absorbs approx. 90mA @ 12V with all three LEDs lit with all RGB lines active. The LED Bar is common Anode.

Dimensions: 3.08x 0.59" (78x15mm) - Mounting hole OD is 0.176" (4.5mm)

More information about the 12' GPS Wall Clock can be found here.

Pricing

	88 in stock backorder allowed

$4.95	price
$4.46	10-99 (10% off)
$3.96	100+ (20% off)

	quantity

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Comments

7 comments

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	by xyzzy +3.2 \| Dec 23, 2008 at 7:26pm 0
I'm assuming that's 3 tri-color LEDs and not 1 each of red, green, and blue LEDs?

	by Bpaton +4 \| Dec 28, 2008 at 11:48pm +0.51
"We don't have specifics on the output luminocity..." Luminocity? Luminocity is a window manager for X.

	by BigDoug +1.7 \| Jan 13, 2009 at 9:53pm +0.72
The red LED on these is very dim compared to green and blue which will make it difficult to mix to white without seriously reducing the green and blue output. Might be able to change the resistor values, but that risks blowing them.

	by darco +5.8 \| Jan 14, 2009 at 10:35am +0.56
The green and blue channels are at least an order of magnitude brighter than the red. In order to do any sort of reasonable color mixing that includes red, I have to cut back the power on the blue and green significantly. Very frustrating. Very disappointing.

	by BigDoug +1.7 \| Jan 19, 2009 at 12:46pm +0.17
I put a 150 Ohm resistor in parallel with the red LED resistors to increase the brightness. It helps some, but will probably reduce the life of the LED's.

	by clintf +3.5 \| Dec 4, 2009 at 2:56pm 0
I took a stab at the current requirements for each R, G, & B at being about 2.2v 20ma for Red, and 3.5v 30ma for B & G. Because I needed to use a 5v source, I just re-flowed the resistors off, and replaced 'em with some 100ohm for the Red, and 150ohm for the Blue & Green. This helps considerably (but doesn't cure) the Red imbalance.

	by c30630 +3.1 \| Dec 23, 2009 at 1:37am 0
A little confused at how you got your values for green and blue unless you made them dimmer by having a larger value resistor to help with the low intensity of the red. 3.5 volts @ 30 ma with 5 volt supply should be in the range of 56 ohms right? I just got some of these and I think I will do the same as you cause I want to use them with the blinkm master.