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The light intensity of an LED is actually specified at a certain current, not voltage. The higher the current flowing through an LED the higher the voltage drop across the LED. Since our bikes have 12V systems there are a number of LEDs in series as well a current limiting resistor and a transistor to turn them on.

Different color LEDs can have very different voltage drops. Generally, amber and red LEDs have the lowest voltage drop (often around 2V). The green, blue, and white LEDs usually have higher voltage drops (closer to 3-4V). So if the system voltage is 14V (when the bike is running) and there are 6 red LEDs in series with each dropping 2V, then you choose the value of the current limiting resistor so that you get the desired current through the string of LEDs. Having worked with similar LEDs before, I would assume that the stock amber LEDs are biased at about 25mA. Using LEDs with a higher voltage drop will require a smaller value resistor.

When I get around to changing these out in my gauges I'll trace out the circuit and share it with everyone. Unless of course someone has already done that and would like to post that info here?
You don't have to change the restrictors, you don't need the higher brightness because they'll shine very bright. I was thinking the same as you, nut then i decided to take lower brightness level and stay inside the limit of 1,9 volt of original. As long that you take same brightness level for same color you will not see a difference.

Besides that it is a parallel circuit so voltage remains the same over all leds.
 

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I have the same question about the tach needle. Just want to make sure before I tackle it.

-keith
I have no idea how to make just the needle white i guess you have to remove the red of the needle and change amber to white.

I changed rpm scale to white and a red led on the end of rpm range: (did not forget one which is not on, that is your blinker for the HISS system).



So you also have to change the led to get a complete white needle.

Not completely white:


Hope it helps :ciao:
 

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so for the 07+ cbrs does anyone know

1) how many leds are needed;
2) are they all the same type (pending colour);
3) a product number for said leds; and
4) a link on where to buy them.

Thanks
 

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Kordo. I used the link to oznium in the first post.
You'll need 13 LEDs and 2 more if you are doing the blinkers.
Order more for when you cook em.
Oznium were great to deal with and like 4 or 5 days to ship here!
 

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so for the 07+ cbrs does anyone know

1) how many leds are needed;
2) are they all the same type (pending colour);
3) a product number for said leds; and
4) a link on where to buy them.

Thanks
Maybe read the whole thread :retard: :ciao:
 

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Needle Color Change

*THIS WILL ONLY WORK IF YOU CHANGE ALL THE LEDS UNDER IT TO WHITE* The method i have used in the past is to scrap the orange/red paint off the back of the needle and paint it the color you want. I love white needles so i use the grey metalic sharpie to color the same area that the original color was. remember if you paint/color the entire needle it will not glow. The same concept works if you are trying to get a blue needle with white gauges, you would just paint the needle blue. Be sure not to paint the Whole needle, just the same area that paint was removed.
 

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FML, i went in to change one of the LED's and now two of them dont work. WTF, heres a pic. What could of gone wrong? And shouldnt the fuel guage be working with it plugged in?
 

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you could of 1) fryed one with too much heat.
2) put it in backwards
3) got a bad led

my vote is number 1. i did that with mine.

1 bad one will stop 2 leds from working, they are in series.

you can test them while soldered in with a good DMM.
 

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It's hard to tell in the blurry picture, but you may even have a solder bridge shorting something out. The one LED is slightly turing on while the other isn't at all. Check both but look closely at the one that isn't even turning on.
 

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hey, thanks a ton for this guide! :01_thumbu just did my 08 led color and polarization, much easier than i thought it would be. ended up going with all blue leds from oznium, i ordered twice as many as i needed just in case, planning to do white tach with blue gauges. started with the blue leds, made a mental note to not put any on the tach spots, and forgot to read the mental note. oh well, i don't mind the all blue one bit... :icon_lol:


you got everything blue but everybody below talks about having to scrape the needle. did you scrape your needle too?
 

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you got everything blue but everybody below talks about having to scrape the needle. did you scrape your needle too?
honestly, i don't remember... i think i just did the leds all blue, but i sold that bike so can't check what the needle looks like for sure. going to do my new cluster and don't plan on scraping the needle. will post up pics again when finished, and let you know if i wind up scraping the paint off the needle.
 

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i did it again without doing anything to the tach needle, same colors as last one but white behind the tach this time and i can definitely see the red on the needle. i think maybe it doesn't show up on the other picture because it was completely pitch black when i took the picture, no ambient light or anything.

sadly this time i got a little dark spot around 7k on the tach, didn't notice it until i had everything back together... must have gotten an led not quite flat, dunno if it bothers me enough to take it all apart again or not.
 

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i did it again without doing anything to the tach needle, same colors as last one but white behind the tach this time and i can definitely see the red on the needle. i think maybe it doesn't show up on the other picture because it was completely pitch black when i took the picture, no ambient light or anything.

sadly this time i got a little dark spot around 7k on the tach, didn't notice it until i had everything back together... must have gotten an led not quite flat, dunno if it bothers me enough to take it all apart again or not.
Most likely you missed the LED, i did this on mine, went back and fixed it, you will notice this on my first picture i posted of just my circuit board, its shinging amber.

Also, i used a qtip and varsol and just wiped the paint away from the bottom of the needle.
 

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Most likely you missed the LED, i did this on mine, went back and fixed it, you will notice this on my first picture i posted of just my circuit board, its shinging amber.

Also, i used a qtip and varsol and just wiped the paint away from the bottom of the needle.
ugh, yeah, that's exactly what i did. oh well, took it all apart again and fixed it. will probably take pics eventually, but looks the same as before but white tach and turn signals.
 

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thought i'd throw up a pic of the new colors, i left the needle red, just doesn't show up very red in the picture. i like the way it looks with it red, so don't plan on changing it... the white turn signals are maybe a little brighter than i expected, but at least i won't be riding down the road with my turn signals on (as much as usual... heh)

also, around the needle it looks kind of blue in the picture, but it is actually faint white. meh, what d'you expect from a cell phone camera.

 

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Hi all! how to remove needle? Just pull it out?
I was wondering that too. When I did mine, I was too scared to pull out the needle. I thought I was gonna break it or something.
 
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