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How to Build the Ultimate Smartphone Projector

2023-12-30 13:24:30

Are you tired of huddling around a small screen to watch movies or share presentations? With the power of your smartphone and a few simple materials, you can build your very own smartphone projector that will transform your viewing experience. In this guide, we will take you through the step-by-step process of creating the ultimate smartphone projector.

Before we dive into the construction process, let's take a quick look at the materials you will need:

1. A shoebox or any sturdy cardboard box

2. A magnifying lens or a fresnel lens

3. Duct tape

4. A sharp utility knife

5. A ruler

6. A marker or pen

7. Black construction paper

8. A tripod or a stable surface to mount the projector

Now that we have all the materials ready, let's get started with the construction process.

Step 1: Prepare the Box

To start building your smartphone projector, take the shoebox or cardboard box and ensure it is clean and free from any debris. You can also paint the inside of the box black to enhance the image quality.

Step 2: Create an Opening

Using the utility knife, carefully cut a rectangular opening on one side of the box. This will be the spot where you will place your smartphone. Make sure the opening is slightly smaller than your smartphone's dimensions to ensure a snug fit.

Step 3: Mount the Lens

Take the magnifying lens or fresnel lens and position it on the opposite side of the box, directly across the smartphone opening. Use the marker or pen to trace an outline around the lens. With the utility knife, carefully cut out the traced area.

Step 4: Secure the Lens

Apply duct tape around the edges of the lens and attach it firmly to the box. Make sure there are no gaps or loose areas to prevent unwanted light leaks.

Step 5: Create a Stand

Cut a small piece of black construction paper and fold it into a triangular shape. This will serve as a stand to hold your smartphone at the correct angle. Attach the stand inside the box, opposite the lens, using duct tape.

Step 6: Adjust the Lens Position

Place your smartphone inside the box, aligning it with the opening. Adjust the position of the lens by sliding it closer or farther away from the smartphone until the projected image appears clear and focused.

Step 7: Test the Projection

Find a dark room and place your newly constructed smartphone projector on a tripod or stable surface. Play a video or display an image on your smartphone and project it onto a clear, flat surface. Adjust the focus and angle until you achieve the desired image size and clarity.

Congratulations! You have successfully built your ultimate smartphone projector. Now you can enjoy a cinematic experience in the comfort of your own home.

Additional Tips:

- Experiment with different lenses to achieve better image quality and projection distance.

- Connect external speakers or use Bluetooth connectivity for an enhanced audio experience.

- Use a wireless screen mirroring device to project content directly from your smartphone without any cables.

Building your own smartphone projector is not only a fun DIY project but also a cost-effective way to enjoy larger screen entertainment. So gather your materials, follow these steps, and get ready to immerse yourself in a whole new world of big-screen entertainment with your ultimate smartphone projector!

Related FAQs about how to build the ultimate smartphone projector

What materials do I need to build a smartphone projector?

You will need a shoebox or cardboard box, a magnifying lens or fresnel lens, duct tape, a sharp utility knife, a ruler, a marker or pen, black construction paper, and a tripod or stable surface to mount the projector.

How do I prepare the box for the smartphone projector?

Clean the box and ensure it is free from debris. You can paint the inside of the box black to enhance image quality if desired.

Where should I position the lens in the smartphone projector?

Position the lens on the opposite side of the box, directly across the smartphone opening. This will allow the lens to project the image onto a flat surface.

How do I adjust the focus and clarity of the projected image?

You can adjust the position of the lens by sliding it closer or farther away from the smartphone until the projected image appears clear and focused.

Can I enhance the audio experience of the smartphone projector?

Yes, you can connect external speakers or use Bluetooth connectivity to achieve an enhanced audio experience while using the smartphone projector.

Glossary about how to build the ultimate smartphone projector


A shoebox is a rectangular cardboard or plastic container typically used for storing shoes. It serves as a commonly used material in DIY projects.

Cardboard box

A cardboard box is a box made of cardboard material. It is commonly used for packaging and can be repurposed for various projects.

Magnifying lens

A magnifying lens is a convex lens that is used to enlarge the apparent size of an object or image when viewed through it. It is often used in magnifying glasses or optical instruments.

Fresnel lens

A Fresnel lens is a type of compact lens that consists of a series of concentric grooves on a flat surface. It is lightweight and can be used to focus or spread light without the bulk of a traditional lens.

Duct tape

Duct tape is a strong, adhesive tape that is made of cloth-backed material with a polyethylene coating. It is commonly used for various repairs and DIY projects.

Utility knife

A utility knife is a versatile cutting tool with a retractable or replaceable blade. It is commonly used for precision cutting in various applications.


A ruler is a flat, straight-edged measuring tool used for drawing straight lines or measuring lengths. It is typically marked with units of measurement such as inches or centimeters.


A marker is a writing instrument with a colored tip that is used for drawing or writing on various surfaces. It contains ink or paint that is visible when applied.


A pen is a handheld instrument used for writing or drawing. It typically consists of an ink-filled reservoir or cartridge and a narrow tip for precise application.

Black construction paper

Black construction paper is a type of paper that is thicker and more durable than standard printer paper. It is often used for crafts, art projects, or as a background to enhance contrast.


A tripod is a three-legged support stand used to hold a projector, camera, or other devices steady. It provides stability and allows for adjustable positioning.