Build This DIY Projector And Put Your Laptop On A Big Screen

If you're tired of crowding around a laptop or smartphone to watch a movie or video clip, this DIY projector will throw it up on the wall for all to see. Plus, it shouldn't cost you too much in parts at your local hardware store.

YouTuber and Instructables user The King of Random put this tutorial together to build a projector screen from really affordable components. All you'll need is a large cardboard box, some duct tape and a Fresnel lens. He picked up the Fresnel lens from eBay, a free cardboard box and a roll of duct tape. If you want a projector screen, he also shows you how to make one from a styrene sheet.

Since the projector only gets light from your device's screen, it will be pretty dim. For the best possible image quality and sharpness, use a bright screen (a laptop would work better than a smartphone) and make sure to keep the lights off, curtains closed, and put the projector as close to the screen as possible.

Finally, the lens will flip the image horizontally and vertically, so after you mount your device, text will appear backwards. Not an issue for action movies, but news or subtitles could be a problem. If you can do this on the cheap the way The King of Random did, it's a fun and portable project, not to mention a fun introduction to optics for anyone interested in a little physics.

$5 Home Theater for March Madness [Instructables]



      Seconded. You can get a new project for under a hundy these days.

        Projector quality varies greatly. At work, we own projectors from $100-2000, there's simply no comparison even between a $100 unit and a $300 unit..

        That said, this does look pretty terrible.. But then, you laugh at this while there are people in the world who can't even feed their kids.

          Actually this would be great for a kids movie night at a scout hall so its not as dumb as you guys are making out. Also, considering a projector is probably way down the list on items I need/want, this $5 version might actually be fun for a family movie night or a nice treat for my daughter when she is feeling a little ill and stuck in bed. Then again.....a positive attitude cannot be built for five bucks so I guess its my outlook that prevents me from sneering at this idea.

            Not sure why you had this as a reply to my comment which was largely making the same point..

              My bad. I had to sign in after hitting reply then scrolled back up to hit reply and got you by mistake. I think you're positively ace. No offence meant.

    Was that dull blurry pixelated mess suppose to be watchable? Save yourself the time and embarrassment.

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