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D-I-Y Turn Your Phone into a Projector

What You Need:

  • Shoebox
  • Paperclip
  • Smartphone
  • Magnifying glass (get it for $1 at Dollar Tree), or a large aperture lens
  • X-acto knife or similar
  • Electrical or black duct tape

Optional:

  • Matte black spray paint or black paper


Step 1: Trace a Hole on the Box

A shoebox or similar will work great for your new projector.

If the inside walls of your box are a bright color, you may want to spray paint them black or tape up some black paper for best image quality.

Once your box is ready, trace the outer edge of your lens or magnifying glass onto one of the short sides of the box.


Step 2: Cut a Hole in That Box

Cut out the inside of the circle you just traced.

You don’t want light leaking around your lens so try not to cut too much.

At the back of your box, cut a small hole for your phone’s power cord.


Step 3: Attach Your Lens

Now you’ve got a porthole cut in your shoebox its time to stick on that lens.

If your magnifying glass has a handle, you may want to remove it first.

Line up your lens with the hole and apply tape around the entire edge of your lens.

Make sure your lens is held securely and there are no holes between the tape for light to escape.


Step 4: Take a Stand

Use a paper clip to make a stand for the phone.

Step 5: Flip Your Screen

When light passes though a lens (including the lenses in your eyes), it gets flipped, which means the picture from your projector will come out upside down.

No fear though, we have a fix!

For the iPhone go to Settings > General > Accessibility and turn on Assistive Touch.

Once activated, a little white orb will pop that you can drag around the screen.

Click on the orb and go to Device > Rotate Screen.

This will allow you to flip applications like the Photos app which would normally rotate itself right side up.

Android users can use the Screen Rotation option or download the app Ultimate Rotation Control from Google Play.

Step 6: Finding Focus

If your walls are plastered with pics you will need to clear out a little space for your projection.

For a screen you could use a white bed sheet, turn a poster around, project onto a shower or window curtain, or just use the bare wall.

Without a focus ring on your magnifying glass you’re going to have to foot focus.

Position your phone in its stand near the back of the box and walk forwards or backwards until your image starts to come into focus.

Once you’ve found a good range you can fine tune focus by moving your phone forwards or backwards in the box.

If you used a camera lens for your projector, you get the bonus of a focus ring that gives you some extra flexibility in terms of screen size and focus distance.


Step 7: Don’t Fight the Light

It’s not the power of your projector. It’s how you use it!

For best viewing, turn the screen brightness of your phone all the way up and turn the room lights down.

Set your phone’s photo app to slide show mode for a hands free experience.

Your power cord can go through the hole you cut in the back of the box and a little tape will seal the deal.



Source

Amazing Shadowgraph using projectors by Taichi Saotome at Galaxy Theater in Tokyo. His precision is just amazing.

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pohroro