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| LEDWIZ wiring question |
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| stalemate:
--- Quote from: mgb on December 15, 2011, 08:56:13 am ---You don't need to add resistors to those Ggg rgb leds. You should however use external power, not the usb power. --- End quote --- Is the USB power not strong enough or what is the deal? |
| mgb:
Current draw is the problem. You can only get so much current from the power on the usb bus. According to the ledwiz cut sheet, its about 500ma I believe. |
| stalemate:
--- Quote from: mgb on December 15, 2011, 05:39:59 pm ---Current draw is the problem. You can only get so much current from the power on the usb bus. According to the ledwiz cut sheet, its about 500ma I believe. --- End quote --- What if I have both of my LED-wiz units connected to a powered USB hub. Would that help? I have 8 buttons per player which should use 60ma per button (20ma x 3) so I think my total current draw per player would be 480ma. I wasn't sure if the 500ma referenced on the LED-wiz cut sheet was in reference to a single LED-wiz unit or to the USB bus overall. |
| BobA:
Depends on your powered hub. Check the wall wart that comes with it to see how much current it can supply at 5VDC. Many 4 or 5 port USB adapters supply less than 1 amp at 5V and therefore greatly under power the bus. |
| stalemate:
I actually have an old 5v dc wall wart that I don't even know what it originally went with. It will do 2.5 amps, so I guess I could just use that directly. Would I need an inline fuse on the connection from the wall wart to the led wiz devices? |
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