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There are a lot of instructables about using LED's in cool and interesting ways, but not often is discussed how you should use LED's on a electronical level.
Since laser diodes are effectively a LED (Light Emitting Diodes) this will work for those as well.
There are a few things you need to know that will stop you from blowing up LED's which can be a pain, especially on the more expensive high power ones.
I'm specifically not going into which LED types produce more light, etc. This is just about hooking up LEDs.
