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Modding LEDs on a Antec 900

post #1 of 20
Thread Starter 
I have a Antec 900 case and have been thinking about modding the LEDs for a while. I like having them however if I need to keep my computer on a night they get pretty annoying while trying to sleep.

I want to mod the case/fans/leds so that I can flip a switch to turn them off/on. I'm thinking of just putting a hole in the back of the case and putting the switch through there.

EDIT: Finished it.

So everything is working perfectly, all LEDs shining and the switch went in pretty quickly. The brightness of each LED is about the same so the values in that table must have been pretty accurate.

Pics are a bit fuzzy...

Anyway heres the switch:


And from the outside:



So yea thats it. Thanks for the help, particularly that table with the forward voltage/current values for different colors of LEDs.
Edited by Xazen - 12/28/10 at 1:33pm
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post #2 of 20
id also like to know
btw i modded a 200mm fan on the outside of my 902 (v8 is too big)
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post #3 of 20
most led fans have them wired in series
you can cut one lead and add a switch/relay to it to control all of them

it wont be easy, and will be alot of extra wires to hide
post #4 of 20
Thread Starter 
I'm not sure if they are in series or not. Each have separate connection coming out of the circuit board in the middle. The wires to/from each LED are not really convenient to work with. I'm thinking that I might just use the +5V and a ground coming from the power supply to power all of them. Using the 5V supply is probably to much power for the LEDs so I'm assuming that I'll have to put a resistor in series with them. Anyone know what the voltage that a typical (case) led uses?

Yea I knew it wasnt going to be easy, I still want to do it though.
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post #5 of 20
Quote:
Originally Posted by ffejrxx View Post
most led fans have them wired in series
you can cut one lead and add a switch/relay to it to control all of them

it wont be easy, and will be alot of extra wires to hide
I would Just use the and existing +12v rail or +5v Rail then use a calculator mentioned below to find the right resistor to place inline.

dont let this discourage you. LEDS are pretty simple, Just figure out your source voltage and get the specs on your chosen LEDS then use a LED Calculator like this to design your new array.
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post #6 of 20
Thread Starter 
Quote:
Originally Posted by cook View Post
I would Just use the and existing +12v rail or +5v Rail then use a calculator mentioned below to find the right resistor to place inline.

dont let this discourage you. LEDS are pretty simple, Just figure out your source voltage and get the specs on your chosen LEDS then use a LED Calculator like this to design your new array.
Thats my only problem at this point, I don't know the specs of the diodes. Are there typical values? Diodes that I have used building circuits in breadboards were pretty tolerant, but I still don't want to blow anything...

If I had a multimeter on hand I would just use that to measure the voltage and current coming to the LEDs from the fan, sadly I don't
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post #7 of 20
uuh led in series?

i acedenly cut the wire to the led on the fans of my tricool and the other 2 leds light up perfectly fine
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post #8 of 20
Thread Starter 
Quote:
Originally Posted by nukefission View Post
uuh led in series?

i acedenly cut the wire to the led on the fans of my tricool and the other 2 leds light up perfectly fine
Well then they are in parallel, or some complicated random configuration. Ill just cut one and see if they all go out, simple enough.

I just need to know what an average voltage/current for LEDs are. They must all be pretty similar.
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post #9 of 20
most led's are 1.2-2v, 3-4 in series for a 5v circuit is about right

alot of blue led's are higher, 3v+, thats probably why they are wired in parallel
Edited by ffejrxx - 12/22/10 at 8:34am
post #10 of 20
Quote:
Originally Posted by ffejrxx View Post
most led's are 1.2-2v, 3-4 in series for a 5v circuit is about right

alot of blue led's are higher, 3v+, thats probably why they are wired in parallel
The LED's will defiantly work in the mentioned range. Here is a sampling by color.

LED Color chart

for most dome type LED's this chart will help you find the FV (forward voltage), and rated amperage you need for the calculator I posted earlier.
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