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What's the inside of a 4P Mameroom LED CP look like?

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Havok:
I would just go with a wall wart adapter, (AC adapter) that outputs 5 volts. Figure out how much amperage you need by adding up all the LED's you will install (typically 20ma per LED) and make sure you have enough current output from the adapter to cover it. I would probably stick to no more than 80% of the capacity of the adapter, just so you aren't driving it too hard.

You should be able to find an AC adapter for around $10, and it's cleaner and easier than a PC power supply.

Rossman:
I was thinking about going with the whole multiple usb splitters, because I was planning on using those LED Wiz, which are USB connected... right?

Havok:
Yes, they are. However, you still need to keep in mind how much current you are running through it. If it is less than 500ma, you're ok (which would be around 25 LED's). However, keep in mind, you never want to drive a component to 100% capacity. If you're talking a 4 player panel pimped out, I can say you most definitely want to run external power for the LEDs...

Rossman:
I was going to go with 32 LEDs, RGB, so 96 connections in all. Are you saying that I shouldn't use LED Wiz, and instead run a hack coming from the computer, or put a power source that independently powers all the LEDs?

Havok:
Depending on how you do your panel, you could get away with just one LEDWiz, however no matter what, you would need external power as well. To get the full potential out of your panel, you most likely are going to want to get three LEDWiz units. Three connections for each RGB LED, and the fourth connection goes to external power. So, with three units you can uniquely control all 32 RGB LEDs. Check out Randy's documentation to see how the external power works:

http://groovygamegear.com/PDF/LEDWIZv2_INSTALL.pdf

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