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laser engraver from dvd writer

Astc

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Mar 30, 2017
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I am working on laser engraver system with couple of my friends . I extracted a laser diode from a 16X dvd writer , and built a Lm317 laser driver , I am building my own laser aixiz module .

My questions are :

what is the focal length of the dvd lens so I can determine the beam diameter for the control system part ?

is there any way to build a ttl laser driver ?
 
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