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Discussion Starter · #1 ·
I finally got around to putting some LEDs in the rear pegs, It only took about an hour or so and was alot cheaper then the $100+ for a set of pre-fab ones!

But what type of resistor will I need to prevent the LEDs from fading out too soon?

I used 5 Linrose SuperBrite # B4304H91
10,000 MCD LEDs
20 Degree viewing angle

and their specs are.....2.2-2.6V @ 20mAH

Someone please correct the following if its wrong, and it probably is :confused:

I was figuring I have 5 leds @ 2.6v=13v
5 LEDs @v20mAH= 100mAH.......soooo [email protected] ?? For each side?

And with that going into the resistance calculator I use

14.4v Supply voltage
13v Forward voltage
100mAh Forward current

and it says use a 1/4w 15ohm resistor?
Is that correct and I just put 1 inline on both the right and left sides?


Pic running off a 3v cell phone battery


Pic 2

Pic 3
 

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Discussion Starter · #3 ·
That looks good, Im just wondering how much of a difference 5 LEDs vs 4 LEDs is going to make? I dont want to over/under power them.
 

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i was able to put up to 12 leds on a single 1/4 wat resistor though it did get hot

i could have done the math but i'm too lazy i just experimented with the ones i got with my leds
 

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Discussion Starter · #6 ·
I found a great page for getting exact calculations for using multiple leds. It took me a while to find it but I think it will help others determine what to use for their projects.

Multiple LED Resistance Calculator

So it turns out this is what I need

 
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