home Boilers and equipment How to make a computer projector from film. DIY projector: simple and affordable ways to create projectors at home

How to make a computer projector from film. DIY projector: simple and affordable ways to create projectors at home

A projector is an important part of a home theater. Unlike a TV, it is compact in size and does not take up much space. This allows you to take it with you to presentations, parties and much more. But the projector is unreasonably expensive, and not every person can buy it. Therefore, the idea of making a projector with your own hands is not without meaning and has the right to life.

Design and principle of operation

There are several types of projectors in the world. Of these, there are two main ones, which are the most common. These are projectors using cathode ray tubes and a liquid crystal matrix.

CRT projectors have many disadvantages that LCD projectors do not have.. This is a lot of weight, brightness is no more than 300 lumens versus 10 thousand for liquid crystal ones and poor image quality. Therefore, now they can only be found in a museum. They were replaced by LCD projectors. These projectors are similar in operating principle to those in which the image source was a film strip. Now a liquid crystal matrix is used instead.

An LCD projector consists of several basic elements:

Control boards;
Light source in the form of a lamp or LED;
2 Fresnel lenses;
Liquid crystal matrix;
Lens.

The light leaving the LED hits the Fresnel lens, which scatters it. Scattered light is evenly distributed over the entire surface of the matrix and passes through it. Passing the matrix, the light takes on the colors of the frame that was on the matrix during its passage. After the matrix, the light hits the second Fresnel lens, which is turned on the other side. The lens collects light into a beam and sends it to the lens. The lens focuses the light so that the picture is clear and has no blur at the edges.

The lens is also used to change the focal length. This is needed to set up the projector when you move it to a new location.

DIY making

A good projector will cost you a considerable amount, so it’s worth thinking about how to make one for your phone yourself.

This projector is easily assembled from scrap materials. Here is a list of what you need:

Hot glue gun;
Elongated rectangular box;
Magnifying glass;
Black marker or paint;
Stationery knife.

If you have collected everything you need, then you can start making a projector from your smartphone with your own hands.

Paint the inside of the box and lid black to prevent light from reflecting off the walls and interfering with the operation of the device. Wait for the paint to dry and begin cutting out the hole for the lens.

Remember that the magnifying glass is the key element of the projector. The quality of the picture directly depends on it. Never buy cheap glasses with plastic lenses. Glass lenses from 10x magnifiers are ideal. If you have a Soviet magnifying glass lying around at home, use it. If you don’t know which box to use, take one from under your shoes, it has the right size. Attach a magnifying glass to the end of the box and circle it with a marker. Use a utility knife to cut a hole along the outline and install a magnifying glass there.

There are only two options for installing a magnifying glass: Place the entire magnifying glass or remove the lens from it and install only that. Choose the option that is convenient for you and install the glass.

Plug in the gun and wait until the glue in it melts. Be careful when working with a glue gun. The glue in it is heated to 130 °C and causes deep burns if it comes into contact with the skin. Place the lens on the hole and apply a little hot glue on different sides. Align the lens with the body and hold until the glue hardens. Take a gun and seal the remaining cracks with glue. Once cured, carefully cut off excess glue from the lens.

Place your phone in the box. You need to place it sideways, with the screen facing the lens. Set the brightness on your phone to maximum and play a video. Turn off the lights in the room and point the lens of the box at the wall. A fuzzy image will appear on the wall. By bringing your phone closer or further away from the lens, get a clear picture to appear on the wall. As you can see, making a projector at home is very simple. Now you can stock up on cookies and enjoy watching your favorite movie on the big screen.

How to make a high resolution projector

Not everyone can make a high-quality projector with their own hands at home, as it requires certain skills. If you cannot separate the matrix from the light-distributing substrate, do not undertake this task.

You will need:

2 Fresnel lenses;
A good magnifying glass lens;
A section of sewer pipe of the same diameter as the lens;
2 guides with plain bearings;
Long screw with nut;
Fastenings for screw and guides;
100 watt LED;
Processor radiator with a power dissipation of at least 100 watts;
Computer fans 120 and 80 mm;
Computer power supply 300 watts;
Boost DC-DC converter 150 watts;
Two-core cable with a total cross-section of 2 mm²;
Cheap Chinese tablet or phone with OTG support;
Tact button;
Glue B-7000;
Any thermal paste;
Hot melt adhesive;
4 silicone or rubber feet;
Sheet plastic that does not transmit light;
A can of matte black paint;
2 furniture hinges;
Plywood;
Corners for fastening sheets of plywood;
A screw from a valve, a wheel from a toy car, or something else that is suitable for the focus knob;
Self-tapping screws.

The dimensions of the projector directly depend on the matrix you choose, so when reading the diagrams, be guided by the proportions. If they don't match a little, it's okay. The main thing is that everything works.

Deciphering the designations:

LCD matrix.
Fresnel lenses.
Fresnel lens holders.
Matrix holder.
Guide fastenings.
Screw fastening.
Guides.
Screw.
Sliding bearings.
Screw.
Lens carriage.
Lens holder.
Lens.
Focus knob.
Phone motherboard.
Display matrix cable.
Air intakes.
Loops.
120 mm fan.
Cover border.
Light-emitting diode.
Radiator.
80 mm fan.
Lens hole.
USB phone connector.
Motherboard power cable.
Power supply and converter.
Fan power cable.
Ventilated compartment cover.
LED power cables.
Rubber feet.
Motherboard power button.

To get started, visit a furniture, construction and radio store. There you will find everything you need. When you get home, check if you bought everything. Otherwise, you risk finding yourself in a situation where half the project is ready and then it turns out that some detail is missing. And according to the law of meanness, this will happen at a time when stores are closed.

Manufacturing of individual parts

Decide on the dimensions and cut out the component parts of the body from plywood. There are only 7 of them:

Base;
Top;
Ventilated compartment cover;
Front and back panels;
2 side walls.

Paint the inside of all the pieces matte red. Solder a plate with holes to the nut on which the carriage will be attached. Install one guide mount onto the base and secure it with self-tapping screws. Place the bearing on the guide and insert it into the installed mount. Then place the second fastener on the free end of the guide and screw it to the base. Repeat this operation with the second guide and screw. The screw is installed strictly along the longitudinal axis of the base, and the guides are installed at the same distance from it.

Cut a carriage out of plywood and secure it to the guides using staples and screws. Do not forget to tighten the nut, without it the carriage will not be able to move. Secure the bearings and nut in the center of the carriage, otherwise it will warp. Cut about 5 cm from the sewer pipe. Insert the lens removed from the magnifying glass into the section and secure it with hot glue. Glue the resulting lens to the carriage with hot glue.

Cut holders for Fresnel lenses from plywood. Make cuts in them in advance for laying the matrix cable and power wires. Place the lenses in the center of the holders and glue them. Cut the holder for the matrix out of plastic, glue it to plywood - not a good idea. The cutout in the holder should be slightly smaller than the matrix itself.

Unclip the cover from the phone, remove or disconnect the battery and unscrew all the bolts. Disconnect the display cable from the motherboard and remove it. Unscrew the screws holding the display and remove it from the phone body. If the display is glued with double-sided tape, carefully pry it around the perimeter with a credit card until it comes off. Using your fingernails, carefully separate the light-distributing substrate with LEDs from the matrix. Try not to damage the conductive tracks and cables going to the matrix.

Use a sharp utility knife or scalpel to cut off the separated backing. Coat the edges of the cutout with B-7000 glue and cover it with the matrix. Place a book on the resulting sandwich and wait until the glue dries. To prevent the cable from coming off, glue it to the holder. Fresnel lenses are glued to the holders in the same way.

Solder the wires to the LED and screw it to the radiator, after lubricating it with thermal paste. Insert the radiator with the LED into the cutout on the rear panel and secure it with the corners. Install an 80 mm fan on it and route the wires into the cutout. Make ventilation holes in the side walls and assemble air intakes from plywood. Install a 120 mm fan on the inside of the wall and air intakes on the outside.

The intake holes should face backwards so that the light coming out of them does not hit the screen. Unsolder the standard power button from the motherboard and solder the wires in its place. Also solder wires to the battery connection terminals. Using small screws, secure the board to the side wall. Cut all the necessary holes in the front panel and begin assembling the projector.

Assembly into a single whole

Using corners and self-tapping screws, connect the base to the front and rear panels. Attach the side walls to them. Place the holders with the matrix and lenses in place. The lens closest to the LED should be placed away from the matrix with an interval of two centimeters. This will protect it from unwanted heat. Install the remaining lens tightly.

Solder the clock button to the wires from the motherboard and insert it into the front panel. Fill the button from the inside of the case with hot glue, thereby securely fixing it. Connect the 12 volt line from the power supply to the input of the converter and set it to the LED voltage. Connect the LED power cable to the output of the converter. Connect the wires from the fans to twelve, and from the motherboard to the five-volt line. When connecting all wires, observe polarity. If you confuse the plus with the minus, your motherboard will burn out.

First startup and setup

Insert the cable from the matrix into the motherboard and cover the entire structure with a lid. Place the projector in a dark room, point it at the wall and turn it on. Install the focus knob onto the screw. Rotate it until a clear image appears on the wall. If all else fails, carefully move the holders with lenses and matrix back and forth. After a clear image appears, carefully fix the holders with hot glue. Attach the top to the case and fix the power supply with the converter on it. Replace the hinges and hang the lid on them. Glue the rubber feet to the base and place the finished projector in the place prepared for it.

As it turns out, you can make a projector with your own hands. Moreover, it is of high quality, not inferior to store-bought ones. And the materials spent on its production will cost you much less than a new projector. The only question is whether you have free time and skills. But it rarely happens that a person has no free time at all, and when there is time, skills will appear.

You can make a projector yourself using Android mobile devices or a laptop monitor. This device is perfect for viewing slides. Also, the homemade projection will make it possible to watch movies. Assembling a simple device is not difficult.

An option on how to make a projector from a phone with your own hands

You can make a projector at home using a regular cardboard box and a phone. This device is not difficult to make with your own hands. To begin with, they carry out the preparatory work and stock up on the necessary tools. The projector will require a cardboard box, a magnifying glass with 10x magnification, a sharp knife, a pencil and electrical tape.

The magnifying glass can be a regular magnifying glass or a Fresnel lens. This item can be purchased at any household store.

If desired, the lens can be made at home. This will require certain knowledge and skills. You can use any box as a base, for example a shoe box.

The sequence of creating a projector from a phone:

First you need to make a hole for the lens. It is performed in the center of the box.
Next you will need to secure the lens in the hole made. To do this, use electrical tape. In some cases, silicone or special glue is used.
Next, you will need to install a stand for your smartphone. To do this, choose the right place. At the same time, the phone must hold tightly and not wobble, so that the image does not end up blurry.
The resulting device should be tested. To do this, close the curtains in the room. After a trial time, the correct placement of the device becomes clear.
On the smartphone itself you will need to install a special program that will flip the image, because the lamp bends the picture by 180 degrees.
On the other side of the box you will need to take care of the hole for charging the phone.

At this point, the homemade cardboard mini projector is considered ready for use. This creates a home theater where you can watch movies with the whole family. In addition, this is a great option for viewing photos with a large group.

A way to make a projector at home from a laptop

A smartphone is a great option for creating a projector. But if you want to improve the quality, you can use another gadget. So it is advised to take into account a laptop or tablet. Due to the higher screen resolution, the video quality will be much better.

When using a laptop, you should understand that the screen resolution will be much better. But the design will be more cumbersome.

The box for building a home theater from a tablet must be large enough. So the length should be at least 50 cm, and the end part is slightly larger than the device screen. It is better to choose a large Soviet magnifying glass.

A hole should be made in the end using a knife. It should be slightly smaller than the magnifying glass itself. The lens is attached using double-sided adhesive tape. Then you should secure the tablet inside the box. It should be taken into account that the lens reverses the image.

Creating a projector from a laptop has its own characteristics. You will need to cut rectangular holes on both ends. The device is placed with the monitor facing down, while the keyboard is located at the top. This placement will help to get the correct image in the final result.

Original 3D projector with your own hands: features of creation

You can make an original 3D projector based on a smartphone. For such a design you will need a plastic pyramid. You can purchase such a device on the Internet, where you can also get acquainted with the dimensions. Then you just need to fix the pyramid on your smartphone strictly in the center and start the required video. The type of design is determined by the purpose of such a device. Therefore, it should be determined in advance.

Purposes of 3d projector:

You can show a real fairy tale from a technologically progressive future. Such tricks will appeal to both the older and younger generations.
This design will interest kids and you can show children cartoons.
A laser slide projector creates the effect of a cinema and you don’t have to spend on unnecessary expenses, this will help you save on the costs of hobbies.

This design does not require special costs and materials. It is enough to show a little imagination. You will only have to spend money on a plastic pyramid, but this is not a significant expense.

Rules for making a projector with your own hands: main features

Before you start building the projector, you should study its design. Only then can you evaluate your chances of getting the right device. The right projector includes a lens and a lens. They affect the uniform distribution of light. Light must enter the lens at a certain angle.

The image source is usually a liquid crystal matrix. She works for the light. Each pixel increases by several sizes. Therefore, the original image should be of the highest possible quality. The brightness of the projection lamp determines the maximum screen size.

For good image quality, the source material must be FULL HD - this is 1920x1080 pixels.

The simplest video projector is made using a smartphone, a cardboard box and a lens. The box should be larger in size than the gadget, and the diameter of the lens should match the size of the screen. Its focal length determines the distance to the screen.

The principle of arranging a simple projector:

A hole is made in the box for the lens;
Any gadget can be secured inside.

The phone frame should be easy to move inside the box. Often, another box, which is smaller in size, is used for this. Reflection of light should be minimal. That is why the inside surface of the box is covered with black applique paper. You can also paint it with matte paint. In some cases, shoe polish may be noticeable. You can also take a thick artist’s canvas

A way to make a magnifying glass at home

The purpose of the lenses is clear. This is a magnifying glass that helps you magnify objects. To make your own lens you will need a plastic bottle, water, plasticine or window putty. When you fill the bottle with water, the magnifying device will be ready, but this is clearly not enough.

Sequential creation of a magnifying glass:

2 identical circles are cut out of a plastic bottle.
Then the two circles will need to be connected using plasticine or window putty. You should not forget to roll out the plasticine before work.
Next, you will need to cut the straw into two parts and attach it to the surface of the lens.
One end of the straw is inserted into a slit in the lens, and the other is used to remove air. This will help force water inside the lens. But all connections must be tight.
Then the lens is lowered into the water and liquid is drawn inside.

After all, the lens is removed and the gap is sealed with sealant. At this point, lens manufacturing is considered complete. For convenience, it is recommended to attach a lens to the structure.

DIY projector screen (video)

To make your own projector, you will need to take a magnifying glass, a gadget and a cardboard box. After simple manipulations, such a filmoscope will project films onto the wall if you make a special elevator. But you can purchase a ready-made Avon mobile projector. Reviews about it are positive.

Almost every person dreams of having a large screen at home on which they can watch movies at any time. But, unfortunately, buying a projector or TV, it turns out, is not affordable for everyone, and that’s when people start thinking about how to make a projector with their own hands.

Theory

Before wondering how to make a projector at home, you need to familiarize yourself with the elements present in a store-bought projector. Naturally, few people will be able to create such equipment as in stores, since it requires the purchase of several high-precision optical elements:

lenses;
lens.

It is these elements that are responsible for how evenly the light is distributed on the screen.

The source of the image in such devices is a matrix operating on liquid crystals, the work of which is carried out through transmission.

In this case, each pixel on the screen is presented in an enlarged size. That is why you need to control that the original picture is as clear as possible.

The maximum screen size is determined by the projection lamp. This is all that is initially important to know to make a projector with your own hands.

Phone-based device

In this case, the only thing needed to make a projector is a cardboard box and a magnifying glass. These items are inexpensive and can be purchased at any store selling household items. If possible, it is recommended to use a Fresnel lens instead of a magnifying glass.

Next, you need to place the lens in front of the phone (acting as a picture source), which is pre-adjusted to the maximum possible brightness. After this, both elements are attached to the box and the projector can be considered ready. The picture is transferred to the screen (a sheet attached to the wall can act as a screen).

This method of making a projector is ideal for children or teenagers who are just beginning to understand the rules of optics, since the resulting image will be of rather poor quality.

Laptop based projector

To manufacture the described device in this way, you will need a laptop, a cardboard box, a Fresnel lens made of hard plastic and tape.

The box must be selected so that its length is about 50 centimeters, and the area of the end part of the box must be larger than the size of the laptop screen.

The lens can be selected in different sizes, but the ideal size would be 20 by 25 centimeters. Lenses of this size are used for reading books. The price of one lens varies from 7 to 8 dollars.

Having prepared all these components to create a projector, you need to follow these step-by-step instructions:

A rectangular recess is cut out on the front wall of the box; its dimensions should be smaller than the dimensions of the lens. For accuracy, you need to attach the lens to a cardboard box as a sample, circle it, and then indent one centimeter inward on each side and draw a smaller rectangle. The drawn rectangle is cut out.

Using tape, attach the lens to the inside of the transverse edge of the box. It is imperative to check that the lens is attached with the grooved part.

You need to place the laptop screen down and place the keyboard on the top of the box. This position will make it possible to immediately achieve a straight and high-quality image. But you need to take into account the fact that the dimensions of the manufactured device will be quite impressive.

To give the projector a visual appeal, you need to separate the box from the laptop and spray paint it in any color you like.

You should take into account the fact that the Fresnel lens contributes to a slight distortion of the image: its edges will be slightly blurred, and the center will be focused. In this situation, to increase clarity and brightness, you need to increase the brightness of the laptop as much as possible and darken the room as much as possible.

But it is also worth noting that the brightness of the image also depends on the distance between the manufactured equipment and the screen. The closer the presented equipment is to the screen, the better the picture quality.

Slide projector

Another idea for a homemade projector is to use a flashlight or lamp in combination with a reading magnifying glass, preferably one that is not very convex.

Initially, you need to create a screen to view the image; to do this, you need to hang a sheet on the wall, after which, at a distance of 2-3 meters from the screen, place a chair. A lighting fixture is placed on the chair. Slides should be installed in front of the light source; for this it is recommended to make a special stand, or you can simply hold the slides with your hand.

To enlarge the picture you need to use a magnifying glass. As a result, the slides must be placed between the magnifying glass and the flashlight. The size and clarity of the image, as in the previous version, are adjusted by changing the distance between the homemade equipment and the screen.

This type of projector design is ideal for having fun with children.

Below you can see photos of various homemade projectors.

DIY photo of projectors

Watching movies at home on the big screen is a very common desire. But its implementation is significantly expensive for most dreamers. Otherwise, they would simply buy either a projector or a TV. But those who understand the design of electrical appliances are quite capable of independently making a projection device for a home theater. This will be discussed further.

A little theory

First, let's look at the diagram of the correct projector. Obviously, not everyone can make such a device. If only because you will need several accurate and high-quality factory-made optical parts:

lens;
lenses.

The uniformity of light distribution on the screen will depend on them. The light must enter the lens at the correct angle. If you do not know the optical characteristics of the lens and lenses, all distances can be determined experimentally.

The image source in the projection device is a liquid crystal matrix. They work for the light. Moreover, each pixel on the screen is projected with increasing size. Therefore, the original image should be as clear as possible. The more pixels the better. The so-called FULL HD is 1920x1080 pixels. The brightness of the projection lamp will determine the maximum screen size on which you can watch movies with acceptable brightness and contrast.

The simplest projector

If the reader owns a smartphone or tablet with a bright screen and a resolution close to FULL HD, and also dreams of watching movies on a big screen, he can try to make a simple device from a box, a lens and his gadget. The housing box should be larger than the gadget in any cross-section, and the diameter of the lens should be commensurate with the size of its screen. But the distance to the screen will depend on its focal length. The idea is simple:

a hole for the lens is cut in the box;
A gadget is placed inside, which can be brought closer or further away from the lens.

The gadget is installed in a mandrel that is convenient to move in the box. For mandrel, another box with smaller dimensions can serve as a completely suitable blank. Reflection of light from the walls of the boxes should be minimal. To do this, it is best to cover the surfaces with black velvet applique paper. Or paint it with matte black paint. Instead of paint, you can use thick black shoe polish. It is best to place guides between the walls of the boxes, especially when using velvet paper. They will protect painted surfaces from rubbing.

That's the whole projector. See its details in the images below.

Painted box

The lens is applied to the body and outlined with a pencil.
A hole is cut along the line from the pencil with a sharp knife.
A lens is inserted into the hole and glued along the contour

We place the carriage inside the housing box and use the projector

The result we see on the screen greatly depends on the size of the image on it. If the size is reduced, the brightness and clarity of the frame will improve. The image quality in this simple projection device is at the “better than nothing” level. But the reason for this is obvious - a higher brightness of the image source and additional optics are required.

High-quality homemade projector

Next, we’ll tell you how to make a projector with your own hands, observing all the requirements. You need to start by disassembling the gadget. It is disassembled while maintaining its functionality so that the liquid crystal matrix of the screen is accessible for illumination by an extraneous light source. If you can't do this, then building such a projector is not for you.

Parts used:

LED power supply board;
LED 100 W (a light source with minimal dimensions is advantageous);
fan power supply board;
fan control board;
intermediate lens;
output lens;
gadget control panel via Wi-Fi;
two intermediate Fresnel lenses;
liquid crystal matrix from the gadget.

Heat sink mounted LED

Demonstration of the effectiveness of a Fresnel lens.
An intermediate lens is placed between the LED and the Fresnel lens to reduce light loss

Elimination of projection distortions by suspending a matrix with lenses with horizontal and vertical deviations

And here is the result of the work done. The distance to the screen is 4 meters, the diagonal of the frame on the screen is 100 inches. Everything is clearly visible.

Based on a slide projector

But there is an easier way to create a projector. To do this, you can use a projector for slides that are projected from a sheet of A4 paper (overhead projector). Since all the optics are already in stock, all that remains is to attach the image source to it. It could be a monitor matrix. It will have to be disassembled while still working. Because after installing the matrix in the projector, the monitor, as usual, is connected to the computer. It is best to use a projector that illuminates the slide rather than using reflected light.

What results from this hybridization of a monitor and a projector is shown in the images below.

That's all there is to do. If, of course, you have such a projector. The resulting visibility on the screen is shown in the image below.

The size and quality of the frame on the screen are very good. Moreover, there are projectors for projecting small slides that are comparable to a smartphone screen. They are cheaper. Therefore, you can buy a smartphone with a broken screen and a faulty projector for its matrix. And what should happen as a result is already shown above.

It is best to watch videos and movies on a big screen, as in a real cinema hall - this requires a projector and a screen, all of this is very expensive, and not every family can afford it. But there is a way out - you can build a projector with your own hands at home, and then invite everyone to the first viewing. According to competent experts, such a miracle of homemade technology is practically not inferior to a standard product. There are several manufacturing options - they are all similar because each uses a special lens and cardboard boxes of different sizes.

An out-of-the-box phone-focused projector is one of those DIY projects that you can easily do yourself. To make it clear to every reader how to make a projector from a phone, we provide a step-by-step manufacturing algorithm, accompanied by photographs of the process. To make a homemade video projector, you will need a simple set of tools, consisting of an old shoebox, a 10x magnifying glass, a sharp knife, a marking pencil, electrical tape and a smartphone.

For a magnifying glass, use a standard magnifying glass or a Fresnel lens, which can be purchased at any home improvement store.

A homemade projector for a home theater is ready, now we check its operation, determine a specific location and invite family members to watch videos. There is an excellent tool to help masters video.

Tablet or laptop based

If you decide to make a projector for your home with your own hands and want to achieve a better image, then you should use a tablet as a transmitting monitor - the screen resolution is much higher than that of a smartphone, which means the quality of the transmitted image is many times better.

For a laptop, these parameters are even better, but the projector itself will be bulky - here you have to choose, taking into account the dimensions of the room for showing films.

box To build a home device based on a tablet, choose a larger one: its length should be at least 50 cm, and the end side should be slightly larger than the tablet screen. To increase it is better to buy a large one magnifying glass Soviet production, then the quality will be excellent. An example would be a device for reading full-page books; the cost of the lens would be around $8.

Using a knife, cut a hole at the end that will be slightly smaller than the magnifying glass, then attach the lens using double-sided adhesive tape, with the corrugated surface inside the box.

We fix the tablet inside the box, taking into account that the lens flips the image.

Design laptop based slightly different - rectangular holes are cut on both sides of the long end of the box. The device itself is located with the monitor down, and the keyboard on the top of the cardboard base - this helps to get the correct image, and not an upside-down version.

How to improve image quality

To increase the quality of the final image, it is necessary to set the maximum settings on the monitor of the product from which the broadcast is carried out, to exclude the penetration of light into the room where the viewing is being organized. The distance to the screen also affects the quality: the closer the homemade projector, the better the quality, but the smaller the picture.

All these parameters are easy to adjust in advance and achieve a quality that will completely satisfy you. There are separate requirements for the screen on which the picture is projected: the canvas must be of high quality, without seams or defects.

Important! If you paint the inside of the box with black paint and eliminate the “leakage” of light through the cracks, the quality of the picture on the screen will significantly improve.

Original solutions

Similar to a device based on a smartphone, you can make a home 3D projector with your own hands or construct it from improvised means, for example, CD boxes, a homemade laser projector for displaying holograms, only these options are more labor-intensive, and the costs will be from 8 to 15 thousand rubles.

For 3D devices You need a special-sized plastic pyramid, the dimensions of which can be found on websites on the Internet. For example, this option: height 45 mm, truncated entrance hole - a small square 10x10 mm, and the lower part - 60x60 mm. Then we place this original design on the smartphone exactly in the center of the screen and turn on a pre-selected video story.

Before you make a projector with your own hands, you need to clearly define the purpose of its use; the chosen type of design will depend on this.

If you want to surprise not only the younger family members, but also the older generation, then do holographic projector, download various videos from YouTube to your smartphone and show magical holograms.
Based on a mobile phone, you can make an original design and play cartoons in the children's room at any time.
When you really want to watch exciting films, like in a cinema, but there are no financial means for this in the family budget, then make a projector according to the second option - surprise with a home theater in your apartment.

To implement your plan, you just need to use a little imagination and purchase not so expensive components, assemble according to the instructions and enjoy watching.