Splice USB 2.0 9pin onto 3pin RGB

[m.malone005]

I bought a Rosewill PRISM S500 and the case comes with a controller on the back of the case but the connection from the controller to the mobo is for a 3pin RGB. The motherboard im using currently ( X370 Krait Gaming ) does not have said header, so I was thinking splicing a USB 9 pin onto it and plugging that in may work. The 3pin is 5v/data/ground and the 9 pin has 5v/D-/D+/ground. I was curious if anyone had tried this, or if there is something I could mess up by giving it a shot.

 

[CountMike]

Don't think that may work. ARGB (3pin) and USB have completely different data protocols.
Another thing, USB2 is not a 9pin but two channels with 4 pins each, 9th pin is not connected anywhere, it's just a key so a header can't be connected wrong way.

 

[m.malone005]

Don't think that may work. ARGB (3pin) and USB have completely different data protocols.
Another thing, USB2 is not a 9pin but two channels with 4 pins each, 9th pin is not connected anywhere, it's just a key so a header can't be connected wrong way.

Thanks for the quick reply! I was just browsing pin layouts looking for something similar for a quick fix, and stumbled on this.

 

[Paperdoc]

No it cannot work. Biggest problem is that a USB2 standard port can supply 5 VDC power at up to 0.5A, whereas RGB lighting systems use much more current - typical RGB header capacity is 3.0 A.

THEN there's the control issue. This case appears to include lighitng devices of the ADDR RGB type. In those lighting "strips" or whatever, all the LED's are grouped into "nodes" along their length. Each node consists of one LED each of the three colours - Red, Green, Blue - plus a small controller chip for that group only. Each controller chip along the strip listens for an instruction arriving in an addressed data packet coming along the Control Line, and activates its own LED group in response only to an instruction addressed to that node. That system uses three electrical lines: +5 VDC and Ground for power, plus the Control Line carrying the instruction packets. With no instruction packets coming from some microprocessor in a controller, the light strip will only display a single coloiu at all times, even IF the power lines provide all the power required. So you NEED a Controller to get the lights to work! The case provides that and uses a manual button on the top to change what the lights display, exactly for your situation where there is no other Controller available on your mobo. So check the case manual and look carefully for how you connect the ARGB controller module in it to the front top switch used for control. Likewise, look for how that board gets power, perhaps from a connection to a PSU output.

 

[m.malone005]

No it cannot work. Biggest problem is that a USB2 standard port can supply 5 VDC power at up to 0.5A, whereas RGB lighting systems use much more current - typical RGB header capacity is 3.0 A.

THEN there's the control issue. This case appears to include lighitng devices of the ADDR RGB type. In those lighting "strips" or whatever, all the LED's are grouped into "nodes" along their length. Each node consists of one LED each of the three colours - Red, Green, Blue - plus a small controller chip for that group only. Each controller chip along the strip listens for an instruction arriving in an addressed data packet coming along the Control Line, and activates its own LED group in response only to an instruction addressed to that node. That system uses three electrical lines: +5 VDC and Ground for power, plus the Control Line carrying the instruction packets. With no instruction packets coming from some microprocessor in a controller, the light strip will only display a single coloiu at all times, even IF the power lines provide all the power required. So you NEED a Controller to get the lights to work! The case provides that and uses a manual button on the top to change what the lights display, exactly for your situation where there is no other Controller available on your mobo. So check the case manual and look carefully for how you connect the ARGB controller module in it to the front top switch used for control. Likewise, look for how that board gets power, perhaps from a connection to a PSU output.

Thanks for the thorough explanation!