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How can I connect several LEDs to 12v outlet in my PC's PSU?

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srk

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I have some (about 30: red, gren, blue, white, UV etc.) LEDs laying around in my project box from a high-school project. And I want to make good use of em. so I want to make some kind of mod for my PC. I forgot the voltage of each kind. but they are all 5mm. so I am guessing they will be of very similar voltage. the problem is I have no idea about how to connect em to the available 12v outlets of my PSU. also, I am a novice with LEDs.
Any help will be appreciated.





 
All your wildest dreams are in this page. Page about wiring LED's

You must read these sections.. or you might be buying new LED's.
Wiring Multiple LEDs In Parallel
and
Wiring Multiple LEDs In Series
 
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