A lot of the history of what we talked about last month doesn't apply, because I an no longer using that whole design. Now it's just relays to switch the power to individual circuits. So far I plan to use 5 circuits, 5 power supplies if need be, and 5 drivers or resistors. I may add more later, up to a total of 8. Not sure what other info you might need.
The plan is for small flashing lights, so I have four relays, controlled by the computer. I already have this part working, so just need to get some LEDs. Each light can have it's own supply, or driver, as they are all independent.
These LEDs cannot be in series or parallel. They are now all separate. One supply or driver per LED.
I did in fact order a few of these
http://www.dealextreme.com/details.dx/sku.13552
that Steve mentioned, to test, so we'll see how that works. That's nice and easy to just switch the 110v with the relays, and be done. They take weeks to get, so I'm still waiting.
I can use whatever supply is best. I don't need to run at 1000ma, but want them to be bright, so why not? I have some 5v 2.2amp switching supplies that I thought I'd try.
I haven't decided on heat sink yet, but since these XPG's are used in flashlights, I imagine they can't get that hot. So far I plan to test with a vice grip clamped to it, and then try a aluminum wall switch plate per LED.
The supply thing will be mounted in whatever case I need, not in the computer. The LEDs outside that, all separate.
The tiny relays I used have 2a contacts, so I see no problem there.
If I was to use these:
http://www.dealextreme.com/details.dx/sku.20330
I'd just use these in place of the resistors, and still use my 5v supplies, yes? Other than some reduction in heat, is there any benefit?