How to Make a DIY Projector

Make your own DIY smartphone projector using everyday objects! Watch movies or impress friends with this fun creative project.

Did you know how to make a projector out of everyday objects? Well, you can, and it’s actually really simple.

With this DIY project, you can understand light and optics.

Additionally, you can show off your creativity by using this projector DIY in your next artwork.

It’s interesting learning how to make a projector at home, and it’s also perfect for those cozy movie nights or artistic ventures.

Overall, this is a fun and educational photography hack that you can do by yourself or with friends or family.

And if that wasn’t enough, you’ll also be repurposing home objects contributing to a zero-waste culture.

So if you’ve been wondering how to make a homemade projector, you’re in the right place!

So, without any more introductions, here’s a step-by-step guide to a DIY iPhone projector.

What You Will Need

How to make a projector DIY projector using a box and phone.

To build this makeshift projector, you’ll be constructing a box that directs light from your phone’s screen towards a magnifying glass. This then projects an enlarged version of the image onto a wall.

To make this you just need a few simple objects. Some of them are optional, but having them will make the process easier and will get you better results.

  • Rectangular cardboard box
  • Magnifying glass
  • Thick black matte paper (alternatively, brush and paint)
  • Tape, normal or double-sided (can be substituted with glue)
  • Exacto knife or precision cutter (or scissors)
  • Mirror
  • Protractor (optional but helpful)
  • Ruler
  • Pencil
  • Smartphone

Note on the box: This guide on how to make a DIY projector works best with a shoebox due to its size. If not, just make sure it’s a rectangular box.

It should be wide enough to hold your phone, but not much wider than that because you want the light to go forward and not spill out to the sides.

Step 1: Cut the Box

DIY smartphone projector tutorial: Start by cutting up your cardboard box.

The first thing you’re going to do is to separate the part that will hold the lens. This is because you can adjust the focus by moving the lens closer or further away from the image.

To do this, cut out one of the short sides of the box.

Step 2: Cover the Inside of the Box

DIY smartphone projector step by step: Cover your box with black paper using basic office supplies.

Now, you need to darken the inside of the projector. This stops the light from dispersing and reflecting back into the image, thus ensuring better quality.

Ideally, you should do this with thick paper – I used Fabriano. This will also help with the overall stability of your projector, as having one side cut out can make it a little wobbly.

If you prefer, you can also use black paint. Just make sure it’s dry before continuing to avoid getting paint all over you and the other parts of the projector.

Step 3: Place the Lens

Insert your magnifying lens. This will enlarge the image beyond what the human eye normally sees when looking at your phone.

On the piece of cardboard that you cut during the first step, draw the contour of the magnifying glass. Then, using the precision knife carefully cut it out.

It’s best to cut a little bit to the inside of the circle you traced so that the magnifying glass will fit tightly and not fall out.

You can unscrew or cut the handle of the magnifying glass if it’s too long to fit. Keep in mind that the size and quality of the glass will impact the sharpness of the projected image.

Step 4: Build a Support for the Lens

Materials and tools needed to create your projection are all cheap and accessible other than your smart phone.

While figuring out how to make a homemade projector with a mirror, it’s essential to support the lens properly.  To create this, cut a strip of black paper that’s long enough to go around the edges of the rectangle your lens sits inside.

Then fold it around and tape it to the cardboard so it’s no longer a flat surface but a rectangular box of its own.

This will give it stability, especially because you might be moving it back and forward to find the right focus.

How to build a smart phone projector: easy science projects you can do with everyday products.

Step 5: Place the Mirror

How to build a smart phone projector: insert your mirror.

Now that you have the lens ready, let’s work on the other side of the projector. How to make a projector with your phone and get it right side up? That’s where the mirror comes in.

If you put your phone directly towards the lens, the image will be projected upside down and flipped left to right.

This is because the beams of light travel from the screen to the lens forming a cone. They converge in the magnifying glass and are refracted towards the wall in an inverted cone. In this process, the image gets turned around.

It’s similar to what happens in a photographic camera, which is why DSLRs have mirrors in them to make you see the image in the viewfinder.

So, to correct the image from left to right, all you have to do is place a mirror in between the smartphone and the lens. Place it on the back of the box (opposite to the lens) at a 45-degree angle.

You can use a protractor to know the right angle. If not, then you can get an approximation by looking down at the mirror and making sure that you can see the lens.

This is how your projector should be looking at this point with the mirror on one side and the lens on the other:

Building a phone projector using a shoebox can be a fun activity for kids.

If you don’t have a mirror, you can skip this step. Just keep in mind that the image will be reversed, so try to avoid images that have any writing in them.

Step 6: Cut Out the Lid

Phone projector instructions: Add tip of phone screen facing through hole.

This step is crucial for those wanting to learn how to make a phone projector that securely holds their device. Before you put on the lid, you need to make a hole for your smartphone screen. Place it on the backside so that the phone is above the mirror.

Make sure you measure the size of the screen and not the size of the phone, or it will fall in. If your phone has a full-size screen then make the hole a few millimetres smaller – just enough to hold the phone on top.

Step 7: Finishing Touches

Your phone image will be projected through the lens.

Your homemade projector is nearly done!

Put the lid on the box and make sure everything is fine. It’s normal that you might have to do some finishing touches because this is crafty work.

Check for any excess paper you need to cut, some spaces or holes you should cover to avoid leaks of light, etc.

Also, depending on the side of the magnifying glass you may have to cut a semicircle in the lid if it covers the lens.

Step 8: Start the Show

Creating projectors from a phone is easy.

That’s it – your homemade projector is ready!

This is how your DIY projector should look when it’s fully assembled. Notice how the front is detached from the rest of the box; that’s for adjusting the focus.

Make sure you disable the sleep mode on your smartphone so that the screen won’t shut off. Then, point the smartphone projector at an empty white wall.

If the image is not very sharp, adjust the focus by moving your DIY lens back and forward. You can also get closer or further away from the wall to find the right spot.

So now, close the curtains and give it a go.

DIY Projector FAQs

Can you make your own projector?

Absolutely. With a cardboard box, a smartphone, and a few basic household tools (like tape, a magnifying glass, and some others) you can create a working DIY projector.

Do DIY phone projectors actually work?

Yes – though of course, the quality will not be as good as a proper store-bought projector.

Why is my homemade projector blurry?

As you’re using a magnifying glass and not a well-constructed lens, it’s likely that the glass has some curvature and/or yields some chromatic aberration. Unfortunately, there’s no cheap solution for those issues.

How can I make my projector clearer?

To get the clearest possible picture, do make sure you have your phone brightness to the maximum, minimize any light leakage from the box, and don’t have your projector positioned too far from the wall.


Creative art project using light projections onto human subject.

Isn’t it amazing? With just a magnifying glass and a cardboard box, you made your very own smartphone projector.

Who would have thought that how to make a DIY projector would be so simple?!

This DIY iPhone projector method, rooted in the age-old ‘camera obscura’ technique, has endless potential applications.

Whether you want to trace images, cast unique light effects during photoshoots, or simply watch movies, this homemade projector is your go-to.

You can do this too, just aim your homemade projector onto a piece of paper and start tracing. Another creative idea is to project images onto your subjects on your next photoshoot creating unique light effects.

You can also use it to show photos to your friends or as a movie projector to watch films. The only limit is your imagination.

If you loved this guide, perhaps you might want to explore how to build a projector that’s more advanced or other DIY photography tools. Always remember to stay crafty and creative!

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Shotkit Writer & Camera Gear Reviewer

Ana Mireles is a Mexican researcher that specializes in photography and communications for the arts and culture sector.



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