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Help with case LEDs ...

post #1 of 4
Thread Starter 
I'm trying to change the led light on my case, the one that turns on after the system is powered on to a cool blue. It's attached directly to the mobo, however what voltage LED do I need?? I'm thinking in the neighborhood of 3volts?? Or am I completely wrong ... please advise. Oh yes, and which pin is positive, the longer or the shorter? Thanks again!
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3700+ San Diego Asus A8n SLi Premium Win XP home - SP2 Gateway 21" ws LCD 
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MS Natural 4000 Aspire 600W Some ole' Antec G5 
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My System
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CPUMotherboardOSMonitor
3700+ San Diego Asus A8n SLi Premium Win XP home - SP2 Gateway 21" ws LCD 
KeyboardPowerCaseMouse
MS Natural 4000 Aspire 600W Some ole' Antec G5 
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post #2 of 4
It will depend on the LED type, its rating and the dropping resistor required to limit the current for long life.

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OS X 10.6.4
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OS X 10.6.4
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Mac Mini Mac Mini Server 2011 Intel HD3000 8Gb 
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2 Internal drives None OS X / W7 x64 Dell U3011 
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post #3 of 4
i did the same thing with my lights changed them to red and blue (HDD and PWR)
i used 3 V LED's, can't remember which side was positive (dont want to open case and pull it out to check which wire was attached to which hole) but you got a 50/50 chance. and LED are dirt cheap i got hundreds of them on eBay for nothing
    
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160GB WD DVD+-RW XP-games+Gentoo-programmin 21' Sun CRT (pwns LCD) 
KeyboardPowerCaseMouse
Regular PS/2 "Quietkey" 680WEchoStar+500Wforfans Uber-modded SuperTower(got for $16!)dual PSU+LEDs USB Optical Dell *ewww, dell* 
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CPUMotherboardGraphicsRAM
Intel C2D e6400 GIGABYTE GA965P-S3 nVidia GeForce 7600GT 1 GB DDR 800 OCZ Gold 
Hard DriveOptical DriveOSMonitor
160GB WD DVD+-RW XP-games+Gentoo-programmin 21' Sun CRT (pwns LCD) 
KeyboardPowerCaseMouse
Regular PS/2 "Quietkey" 680WEchoStar+500Wforfans Uber-modded SuperTower(got for $16!)dual PSU+LEDs USB Optical Dell *ewww, dell* 
Mouse Pad
"ALGOR" POS 
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post #4 of 4
When it comes to LEDS. The longer leg is always positive. You could also use 12v leds if you want. they would just use less amperage to get the same brightness. And longevity should still be the same. I alos have seen lots of 3 volt LEDs. but anything from 2.6-3.8volts shoudl work. The only problem is that you will need to step the voltage down from the 5or 12v rail or use your 3.3volt rail by tapping into your main 24pin motherboard molex. I prefer just getting 5volt leds.
    
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IBM type m PC Power + Cooling Silencer 610 CM storm G5 
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the desk 
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CPUMotherboardGraphicsRAM
Q6600 B3 @ 3.6ghz ASUS MAXIMUS SE XFX HD5770 Gskill 2x2gb 
Hard DriveOptical DriveOSMonitor
2x seagate 500gb in raid 0 + wd geen 1.5terrabyte DVD-RW win 7 + xp samsung 712n w HP w2007 
KeyboardPowerCaseMouse
IBM type m PC Power + Cooling Silencer 610 CM storm G5 
Mouse Pad
the desk 
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