Custom 3D printed RGB cover

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Daan32

Daan32

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Feb 19, 2017
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Hi guys,

I want to 3D print a custom RGB cover for my Cryorig a40 ultimate (aio). I want to hook up 4 LEDs to the 4 pin fan connector on the pump, the LEDs consume a little over 3 volts each so that should be no problem, but I don't really know how it works with the amps. Will it just supply exactly enough amps for all 4 LEDs or will it supply too much/too less. And also, will there be a constant 12 volts through that 4 pin connector, or will it be less sometimes?

Thanks in advance,

-Daan
 
Solution
CountMike
Fans and LEDs are meant for DC(Direct Current) so they can work only when connected one way. LED leads are usually different length where longer one is + lead and shorter one is -(minus).
On 4 pin headers on the MB, little plastic locator tab is offset to one side and first two pins on that side are for 12vDC.
First pin on shorter side is - (minus = negative) and second one + 12vdc and that's where LEDs should be connected to.
http://pinoutguide.com/Motherboard/mb_pwm_fan_pinout.shtml
https://learn.sparkfun.com/tutorials/polarity/diode-and-led-polarity
All LEDs should be connected in parallel, all + leads together and all - leads also together. Also watch out for LEDs and which ones you get. Most are made for 3v - 5vDC and would...
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CountMike

CountMike

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Oct 31, 2015
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LED lights use very small amount of power so you can put a bunch of them, pump headers usually have more output power than fan headers so it's another plus for it. Only problem is that pump and fans have feed back connections and LEDs don't so you'll always have only 12vDC for them, no way to regulate. You also have to make sure of polarity.
 
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Daan32

Daan32

Reputable
Feb 19, 2017
32
0
4,530


Hi,

Thanks for responding. Can you tell me what polarity means? I'm not that good at electronics.
And sorry I voted your answer down, it happened by accident.
 
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CountMike

CountMike

Titan
Oct 31, 2015
33,782
3,152
147,990
Fans and LEDs are meant for DC(Direct Current) so they can work only when connected one way. LED leads are usually different length where longer one is + lead and shorter one is -(minus).
On 4 pin headers on the MB, little plastic locator tab is offset to one side and first two pins on that side are for 12vDC.
First pin on shorter side is - (minus = negative) and second one + 12vdc and that's where LEDs should be connected to.
http://pinoutguide.com/Motherboard/mb_pwm_fan_pinout.shtml
https://learn.sparkfun.com/tutorials/polarity/diode-and-led-polarity
All LEDs should be connected in parallel, all + leads together and all - leads also together. Also watch out for LEDs and which ones you get. Most are made for 3v - 5vDC and would burn up if connected to 12v.
For simplicity, you need to find LEDs that work on 12vDC, otherwise you'd need to include other components like resistor(s) for instance.
 
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