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Stretching the budget with an LED-Wiz
arzoo:
--- Quote from: QuixoteQuest on January 11, 2007, 01:15:34 am ---I had better do more research. I thought if I bought the RGB lights that come with the ICE buttons that it was as simple as plugging each of the leads into a power terminal, much like wiring up the IPac. I didn't know I needed to mind equipment like resistors.
--- End quote ---
Purchase the GGG RGB-Drive modules with the RGB LED and resisters pre-installed and you'll be fine. You can also purchase them with a small ribbon cable pre-soldered on. Either way, all you need to do is wire the R, G, B, and +5v leads to the LEDWiz ports - very easy. And you can have more than one LED attached to each port.
QuixoteQuest:
Yes, I was just thinking of buying the RGB lights that already have the little circuit boards on them together with the wires. Hopefully those 4-wide ribbons aren't hard to strip. Otherwise it seems like GGG has made it pretty convenient to buy all ready to go, even planning their ICE buttons to fit in the boards and everything, albeit at a small premium for the convenience.
I was just hoping I could plug two leads into a single output without having to worry about the supplemental power warned about nor endanger CP with any fire or overheating risk. If so, how many leads could an output take without such needs or risk?
arzoo:
I'm not sure there's really a limit as long as they're wired in parallel (which is the case for the RGB-Drive modules). As for stripping the ribbon cables - it's a bit of a pain - make sure you have a good wire stripper.
QuixoteQuest:
Just want to clarify I understand how I was planning to wire is wiring in parallel:
Each lead for each RGB color attaches in its own output port; in the case of multiple LEDs going into the same output they should plug together in the same output. All power leads obviously would not all fit into the same output, so they will go in the same wire nut with a single wire that will lead from the power output to all the wires in that nut. (Or rather what I expect I would do is: all the power leads from each set of 8 of the leads will nut together, which would give me only 4 wire leads going from each nut into the USB output, thus probably fitting well.)
If I remember right as I write this: each RGB lead is 20ma, so even if I had only one LED lead per port of the 32 available I will exceed the 500ma USB rating, thus requiring external power. I'm planning on firing 17 RGB buttons off of one LED-Wiz board, which would be 60ma per button or 1020ma or almost twice the rating for the USB power supply alone. Therefore I need to supplement the USB connection with an external DC power supply, too. But as long as I do that I just want to be sure I'm not introducing an overheating or fire risk to my CP. . .
Thx for the help.
arzoo:
--- Quote from: QuixoteQuest on January 12, 2007, 11:00:47 am ---Just want to clarify I understand how I was planning to wire is wiring in parallel:
Each lead for each RGB color attaches in its own output port; in the case of multiple LEDs going into the same output they should plug together in the same output. All power leads obviously would not all fit into the same output, so they will go in the same wire nut with a single wire that will lead from the power output to all the wires in that nut. (Or rather what I expect I would do is: all the power leads from each set of 8 of the leads will nut together, which would give me only 4 wire leads going from each nut into the USB output, thus probably fitting well.)
If I remember right as I write this: each RGB lead is 20ma, so even if I had only one LED lead per port of the 32 available I will exceed the 500ma USB rating, thus requiring external power. I'm planning on firing 17 RGB buttons off of one LED-Wiz board, which would be 60ma per button or 1020ma or almost twice the rating for the USB power supply alone. Therefore I need to supplement the USB connection with an external DC power supply, too. But as long as I do that I just want to be sure I'm not introducing an overheating or fire risk to my CP. . .
Thx for the help.
--- End quote ---
Your wiring is correct. I don't recall any way to add external power to the ledwiz. The ggg site indicates that the ledwiz can support 15 LEDs per port (480 total).
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