laser from dvd burner

Hi i am going to build a red laser with a old dvd burner, I am gonna get the LM317 next week.
I was going to follow this https://youtu.be/-m21xUwBjvU tutorial. Any advices? My first real project, pretty new in electronics.

  1. 2 months ago
    Anonymous

    I recommend welding goggles when testing and using. It only takes a second.
    You can buy laser pointers at pet shops and use that as the housing. Not sure why you need a transistor, but whatever.
    Resistors and other electronic parts aren’t easy to find anymore unfortunately, I have to order stuff online. Chinese soldering irons perform fairly well, I see no reason for a beginner to invest in a $500 Weller.
    If you haven’t soldered before, find a PCP with a at least 30 holes in it and solder wires to it. You want it to form a nice slope to the wire, if its floating like a bubble you have a cold joint which is bad. It’s probably best you find another video showing how to solder.

    • 2 months ago
      Anonymous

      thanks, I have a friend that will learn me/solder stuff with me so it should be fine. does welding goggles really protect from laser tho? at least it will be better than nothing I guess. for some parts, as you said I got some from china and the resistors from a local shop.
      I will consider a housing if my stuff even works lol.
      Thanks, anon!

    • 2 months ago
      Anonymous

      >welding goggles for laser protection
      Fuck no, the laser OP linked to can set things on fire. If you're gonna mess with that kind of laser, then save up for a decent pair of laser safety goggles.
      Your eyes are worth a lot more than the 80 something dollars these goggles cost.

      • 2 months ago
        Anonymous

        This bro knows what's up. Even the laser reflections can cause blindness, just get some good laser goggles and you're safe.

      • 2 months ago
        Anonymous

        This bro knows what's up. Even the laser reflections can cause blindness, just get some good laser goggles and you're safe.

        Seriously, buy some laser safety googles, ones specifically intended for lasers.
        They're not expensive, and you're a fucking retard if you don't use them.
        It takes the briefest blip of a laser reflecting off the tiniest little shiny thing, suddenly you're down an eye permanently, possibly both eyes.

        • 2 months ago
          Anonymous

          Great maybe I’ll be riding home on a subway and some sicko will appear and graffiti my retinas with his “seen on youtube!” DIY laser pointer.
          At least I’ll have a reason to stop looking at monitors all the time.

      • 2 months ago
        Anonymous

        Laser googles won't fully protect you. The safest bet is to use a VR headset connected to a camera.

    • 2 months ago
      Anonymous

      >I recommend welding goggles

      • 2 months ago
        Anonymous

        I’ll head your warning next time I work with lasers that fry your eyes with non IR or UV light.
        Oh wait…

  2. 2 months ago
    Anonymous

    Don't point it up into the sky, the airplane police will arrest you.

  3. 2 months ago
    Anonymous

    it's upto luck tbh

    I once took apart a laptop DVD drive and the laser was "unsalvageable", there were 3 mirrors to reflect the laser and i think adjust the wavelength or smth

    the diode was literally a part of the chasis, it's hard to describe but at that point it's better to buy one online or smth for any practical use

    • 2 months ago
      OP

      I have two dvd drive to salvage so if i'm at least a bit lucky it should be fine.

  4. 2 months ago
    Anonymous

    video says how to build laser from dvd drive. proceeds to buy all the components and does not build laser from dvd drive.

    • 2 months ago
      Anonymous

      It's one of those fake DIY videos.
      :/

  5. 2 months ago
    OP

    the entire point of this project is that I am poor
    60+ $ laser goggles arent gonna make it lol
    I will update if i'm blind.

    • 2 months ago
      Anonymous

      >I will update if i'm blind.
      No you won't, you'll cry like a moron in the hospital until they force you to go home to continue crying like a moron.

      • 2 months ago
        OP

        Don't say what you think i'm gonna do please.

        • 2 months ago
          Anonymous

          When you burn your retinas, you will cry like a moron, and you will be left destitute by your medical bills because:

          the entire point of this project is that I am poor
          60+ $ laser goggles arent gonna make it lol
          I will update if i'm blind.

          >I am poor

          You are going to end up blind in either one or both eyes if you complete this project because that's what happens to children who treat tools like toys.

          • 2 months ago
            OP

            nah will use soldering googles won't be totally blind only dark spot it's fine

            • 2 months ago
              Anonymous

              Won't do a thing to protect your eyes.
              Consider drinking copious amounts of drain cleaner to build up some laser immunity.

            • 2 months ago
              Anonymous

              Holy shit that's stupid.

            • 2 months ago
              Anonymous

              > oh yeah, I would rather risk permanent eye damage instead of saving up for the proper safety goggles
              If you can't afford proper laser safety goggles. DON'T fucking mess with laser then. How hard is that to understand?

  6. 2 months ago
    Anonymous

    OP, a lot of people will tell you that you need laser glasses, and it's generally good advice, but for what it's worth if you're careful about
    1) always pointing the laser in a safe direction
    and
    2) only powering the laser when it's pointed in a safe direction
    then you'll be fine without goggles as long as your laser is around ~500mw or less (above that, reflection can be an issue even on ordinary materials).

    That said, you really should just get the goggles since you're new to this and there's a non-zero chance you'll fuck it up

    > t. I work with a variety of lasers between 500mw & 5500mw optical output

    • 2 months ago
      Anonymous

      It's true that for most things you can usually get away with no PPE and just being careful, but look at OP's posts in this thread. He's a retarded moron and is going to fuck himself up.

    • 2 months ago
      OP

      laser will probably (I hope) around 200-400 mw. I'm gonna tape the diode to the table or something i'll be fine

  7. 2 months ago
    Anonymous

    Since you're not going get the goggles, I suggest you have a look at this while you still can.
    https://www.everydaysight.com/beginners-guide-to-braille/

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