Basically I have a load of cathodes that aren't being used at the moment, would be nice to use them but I need them to be powered via a usb connection, is this possible and are there any lights available with usb powered connections?
Antec do external usb powered cathodes. I have a pair of mini ones (about 2" long). They can be either on, off or sound activated. The details of the full size ones are here
I don't know how/if you'd be able to modify internal cathodes to be powered via usb
I think that USB port gives off 5V while the normal cathode connects to a 12v molex so don't know if it's possible to modify it. Better probably to buy one already made for 5V.
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