i have a 3 pin laser diode from a cd or dvd player from a compputer and i want to make it shine Answered

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i have 2 laser diodes and i want to light them and i dont know which of the 3 pins to connect the power so i am asking anyone if they can help me, to tell me how

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i think some diodes have + and - on the outside, and the middle pin is like the gate on a transistor

If you don't know where it's from, it could be shining in invisible IR. Be careful not to point it anywhere near anybody's eyes.

Try to google the datasheet for the laser diode. The datasheet will give you the diagram and a description of all pins.