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Standalone LED system?
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cholin:
AS LONG AS THEY'RE THE SAME COLOR!  Electricity takes the easiest path.

Absolutely beautiful tutorial: http://lsdiodes.com/tutorial/

It's short and it explains everything.

--- Quote --- How do I rig up a switch and leds to a battery?
--- End quote ---
Get a battery pack with wires first of all.  Then, wire them up the same way as you would with a PSU, red is positive, black is negative(ground).
NoBonus:
So, I guess the real question is how many 5mm Blue 5900mcd LEDs do I need to properly illuminate a transparent blue trackball?  Is there a better Blue LED choice? is 5mm overkill? Should I look for the THC3 11000mcd LEDs?
cholin:
I think that 2 regular blue ones should do the trick, especially if you buy a cheap dollar-store flashlight and use the shiny plastic reflector.
Gamecab:

--- Quote from: NoBonus on April 05, 2005, 04:07:28 pm ---I want to add some LEDs to my control panel, but I do not want to tap into the power from my MAME pc.
--- End quote ---
Trimoor:
Or you could use the 5V connection on your keyboard encoder...
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