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More questions: CPU/GPU Power and LED Controllers
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fluentd:
Anyone with some incite on the computer end?
Mysterioii:

--- Quote from: Nephasth on September 18, 2012, 04:35:55 pm ---Current capacity. I don't have any experience with mosfets, and haven't researched them. But I do know that 3 outputs of the PACLED64 (by itself) can only handle 1 RGB LED (single RGB LED, not segment of 3) from the LED strips. I'll have to look into mosfets for future projects.

--- End quote ---

Oh yeah man, do check them out, they come in handy.  This is one I used a few of in a project I did recently, it can handle up to 60V and 30A, and you can gate them with a much lower voltage.  If you have a controller that you're using for fairly low-voltage outputs like single garden-variety LEDs but you want to use the same controller to drive some high current things like LED strips, relays, buzzers, DC motors etc., just grab some $1 mosfets (and a couple of cheap resistors... google around for example circuit layouts).

http://www.mouser.com/ProductDetail/Fairchild-Semiconductor/FQP30N06/?qs=sGAEpiMZZMsrr1kXJis%252bJ24zftF0OaFrghFV5NYryYg%3d
AndyWarne:
As an indication of how MOSFETs are used, below is the schematic of our nwer version of RGB trackball illumination kit. The inputs are driven by the PacLED64 which supplies a current regulated pulled-to-ground drive signal. The MOSFETs drive the LEDs which are 60mA each.
Diet_Pepsi:

--- Quote from: fluentd on September 18, 2012, 05:29:39 pm ---Anyone with some incite on the computer end?

--- End quote ---

Your question on CPU/GPU requirements is a bit open-ended.  For example, what MAME roms are you looking to run?

An entry-level dual-core CPU, such as the Celeron G530, or an Athlon II x2, can run PSX and most MAME roms no sweat.  Also, a lot of folks on this forum (me included) have purchased 3-4 yr old (and sometimes older) PC's that can easily accomplish this. 

If you want to run Dolphin, you would want to upgrade to something like a Pentium G860 or an unlocked Phenom II.

Dolphin GPU requirements are a little more tricky -- it depends on more of the specifics of Dolphin that you are looking to run.  The Dolphin forum has some good posts on GPU requirements that can get you started.
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