Jump to content
Dazley

Make Pacific RGB Fittings compatible with Asus Aura (professional electrician needed)

Recommended Posts

I've recently ordered those Pacific RGB fittings from Thermaltake and i've inspected their structure. Apparently it's just BRG+... no fancy digital control, so making them compatible with Asus Aura should be easy, right?

Well, that's why i'm making this post, because i'm not 100% sure how to make this. Asus Aura works with BRG+12V while the Fittings are powered with BRG+5V.... So theoretically i should be able to make one tiny adapter cable from PWM to RGB LED connector with a resistor on the + line, right?

The thing is, since we get the option to daisychain them, i want to daisychain 4 fittings to one connector and i'm not exactly sure about the maths for the resistor. Can someone with proper knowledge of electronics help me out, please?

From what i can see the LEDs are connected in parallel on one of those ring pcbs with each color channel for each led having a 330 Ohm resistor. I assume the LEDs are SMD 1616 RGB LEDs with a 25mA max on each color channel? So that roughly accounts for a 5V input. The controller box is hooked up to the 5V line of the molex connector, so i'm pretty sure it's BRG5V

Now to my problem.... how do i make the adapter cable if i want to daisychain four of those fittings to one BRG12V connector?

DSC_0130.thumb.JPG.4406c95a45bea37d5b30a73759bb6aff.JPGDSC_0128.thumb.JPG.b3c56364016d044176ec08099fc68bbb.JPGDSC_0139.JPG.6d404c508137d6fe9693cebdb670763a.JPG

Share this post


Link to post
Share on other sites

I did the math, you need a 280 ohm resistor to make it work in line. However it needs to dissipate more wattage than most single resistors will. I chained 3 100 ohm 1/4 watt dissipation resistors in series in the 12V supply line. All test fine on the 12V supply from the PSU, haven't used the header yet as I'm still building but I believe it should be fine. 

Share this post


Link to post
Share on other sites

Not exactly. Each wire has 6x 330 Ohm resistors in parallel which is equivalent to 55 Ohm if you want to add a resistor in series before all of them. According to my calculation, you just need a 77 Ohm resistor on 12 V wire.

After testing, I personally did put an 100 Ohm resistor on the 12 V wire just so the the voltage after the resistor is about 4.8 V (measured using multi-meter). I find 100 Ohm is a safe value if you want to put just one fitting on the line.

If you are to add more (using the Y connector with it) that value can be decreased even more ( it technically parallel wiring). But I would recommend just to 100 Ohm to get good balance and brightness. Anything more than 100 Ohm with look dim if you add more fitting on one chain.

Share this post


Link to post
Share on other sites
On 12/12/2017 at 1:01 PM, TanoSkywalker said:

Not exactly. Each wire has 6x 330 Ohm resistors in parallel which is equivalent to 55 Ohm if you want to add a resistor in series before all of them. According to my calculation, you just need a 77 Ohm resistor on 12 V wire.

After testing, I personally did put an 100 Ohm resistor on the 12 V wire just so the the voltage after the resistor is about 4.8 V (measured using multi-meter). I find 100 Ohm is a safe value if you want to put just one fitting on the line.

If you are to add more (using the Y connector with it) that value can be decreased even more ( it technically parallel wiring). But I would recommend just to 100 Ohm to get good balance and brightness. Anything more than 100 Ohm with look dim if you add more fitting on one chain.

Hey could you please elaborate on the process you used to do this. I'm pretty new to wiring so a parts list/ photo of the adapter or diagram would be really helpful also is the 12v wire the first pin on the left of the 4 pin header? 

Edit: So what I'm thinking is buy wires male and female connectors and a 100 omh resistor and make an extension cable like this. Would this work?

   

diagram rgb fitting.png

Edited by ajem
additional information

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


×