DIY laser diode driver | Constant current source


GreatScottLab’s instructable on how to make your own constant current source and how to get a ‘burning’ laser diode:

In this project I will show you how I extracted a laser diode from a DVD Burner which should have the power to ignite a match. In order to power the diode correctly I will also demonstrate how I build a constant current source which delivers a precise and steady current to the load.

Check out the video after the break.

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  1. Certainly is a “dangerous prototype”! If powerful enough to ignite a match, the laser is certainly powerful enough to blind you (that’s your problem) or an innocent passer-by.

    Old laser hands know just how dangerous specular reflections can be, and live by the motto “Do not look into laser with remaining eye”!

  2. Especially IR laser – cannot see the beam. Wear laser safety goggles AT ALL TIMES when power is on or can be.

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