I think many people would like to have a home theater in their home. If you've already thought about this, you've probably come across the question - how to make a big screen? If you buy a TV, it will cost a pretty penny, and even big TV with a diagonal of one and a half meters will not create the impression of a cinema. Another option is to buy a projector. Of course, the idea is also very expensive, plus you can hardly find the components, and if you do find them, they are expensive. I mean the projector lamp, and it doesn’t last long.

But if you use a real projector at home, you can create a real cinema hall.

There is a third way that I took - to make a projector myself. This is not relevant to the article, but I will still tell you why I decided to take this step. I had a dream in my head for several years to build my own home theater. And then a girl appeared in my life... And you can’t even imagine what a desire I had to invite her to watch a movie in the cinema. In our run-down town, apart from numerous pubs, there are practically no attractions, and we’ve only heard about cinemas here. So I decided to build my own.

In general, whatever your goals, let's get started.

Parts and components.

Having rummaged through the Internet, I ordered the following for delivery by mail: two fresnel lenses with focal lengths of 220 mm and 317 mm, a lens of 80 mm / 1: 4 / FR = 320, and the heart of the projector - an LCD matrix with a diagonal of 15 mm and a resolution of 1024x768.

I ordered a body from a sawmill and designed it myself, so during assembly a bunch of shortcomings were revealed.

Light. Powerful LED and driver for it. LED power 100 W. This was all sent straight from China.

Projector assembly.

First, let's disassemble the monitor.

And very carefully remove the matrix itself.

There is an anti-reflective film on the front of the matrix. You can, of course, leave it, but I preferred to remove it, thereby improving the image quality.
It is removed like this: covered with wet napkins or a towel and left for 10 - 12 hours. Then carefully removed.

Checking functionality after removing the anti-glare.

Everything works. Now let's start assembling the case.

We adjust the frames on which the matrix and fresnel lenses will be attached

We attach the lenses with ordinary self-tapping screws, with the ribbed side of the lens facing inward.

Yes, I also forgot to mention about buying a radiator with a cooler from a computer. I installed an LED on this radiator, having previously lubricated the surfaces with heat-conducting paste for better contact. For reference: a powerful 100 W LED is equivalent in luminous intensity to a 400 W metal halide lamp.

We insert and attach the driver and radiator to the case.

We check and are a little disappointed: our Chinese friends sent a defective LED - one section does not light up.... Well, oh well.... Plus, the driver is heating up, and I decided to reinstall it.

We take out our box of lenses and insert the matrix into the middle. The matrix in the image should be rotated 180 degrees relative to the top and bottom and upside down. In other words, where there is up, there must be down, and where there is a left edge, there must be a right. This is done so that everything is projected correctly, since the lenses flip the entire image.

We fix it. lens with a focal length of 220 mm to the LED.

Turn on and empirically We find a place to mount our box from the wrappings, so that the light is distributed evenly across the screen.

Here I got a good picture when projected onto a wall with wallpaper. diagonal 2.5 meters.

The development is completely mine, but remains to be perfected and not yet serially produced. I will be glad if the most active brainiacs take advantage of the idea.

The plan was to make a model of an inexpensive projector for stores. We don’t often post them, so this article is one of them. It should project logos and store names in the evening and at night.

Research

The first thing I did was disassemble the existing magnifying glass. There were 2 lenses. I wanted to make a very inexpensive but good projector.

I cut out the rims for the lenses and began to empirically select light sources and distances.

Different lamps gave results, but I realized that for a good and bright image from our homemade photo projector we need a spherical reflector. It will serve as a lens, giving us the opportunity to further simplify the design and increase efficiency.

The lamps are sold with a maximum power of 75 W and one costs only $1.

The brightness has increased significantly. One 16mm lens + stained glass film:

Building a test instance

and at my request they made me this test case from a 2-inch water pipe:

The notches on the body served as grooves and markings for screwing in self-tapping screws.

Matrix was made of ordinary transparent plastic on the same homemade CNC machine. Temperature measurements showed that the lamp body in some places heats up to 220 degrees Celsius in a couple of minutes! No plastic will last long here, but it will do for further tests.

I found a textolite rod on the market. It also had to be sharpened a little and recesses made for the lens.

Video of milling and sampling on a CNC machine:

It’s a pity I pressed hard and the lens broke off a little later.

Second sample projector

This time the projector had threads and a longer housing to hide the lamp.

Crosses (although this is not according to the rules) indicate holes.

Optics

I replaced the lens with a larger one. The magnifying glass was 10x50 mm. The pipe is also slightly larger. The brightness increased further.

For all Chinese magnifications, the magnification does not seem to coincide at all with what is written in different manufacturers with the same magnification and diameter, the result of magnification is different. This made it a little difficult to select optimal sizes housings.

Matrix

I decided to make the matrix for this projector like this:

1. Laser print the design onto transparent vinyl film

2. Remove the heat-resistant glass from the lamps

3. Assemble the sandwich using superglue

I don’t know how long this option will last. During the short tests, everything went smoothly, but I probably still need to learn a lot about how to do without film.

Step 1

Step 2

Step 3

Projector assembly

After installing the matrix, screw in the lens and adjust the focus of the picture.

You can make your own projector using mobile devices android or 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, do preparatory work and stock up necessary tools. The projector will require a cardboard box, a magnifying glass with 10x magnification, sharp knife, pencil and tape.

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

1. First you need to make a hole for the lens. It is performed in the center of the box.
2. 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.
3. Next you will need to install a stand for your smartphone. For this they choose right place. At the same time, the phone must hold tightly and not wobble, so that the image does not end up blurry.
4. 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.
5. 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.
6. 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. Besides this this 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:

1. You can show a real fairy tale from a technologically progressive future. Such tricks will appeal to both the older and younger generations.
2. This design will interest kids and you can show children cartoons.
3. 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 as large as possible good quality. The brightness of the projection lamp determines maximum size screen.

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:

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

The phone frame should be easy to move around inside the box. Often, another box, which is smaller in size, is used for this. Reflection of light should be minimal. That's why inner surface The boxes are 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 magnifying glass:

1. From plastic bottle cut out 2 identical circles.
2. 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.
3. Next, you will need to cut the straw into two parts and attach it to the surface of the lens.
4. 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.
5. 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 a projector yourself, you will need to take a magnifying glass, a gadget and 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.

Content:

Modern TV screens have reached sizes measured in meters. But for some fans of watching movies on the big screen, this is either not enough or unaffordable. There are other possible reasons. The main thing is that there are people who want to make a cinema at home. Of course, this makes some sense. The twilight of an improvised home cinema immerses you more fully in the events on the screen. After all, vision is less distracted by the surroundings hidden in dim light.

This article is intended to help those wishing to acquire projection equipment by applying their own skill to it. Next, we’ll talk about three projector designs for watching videos on a large screen. Of course, you can search for something else on the Internet. But we recommend not to waste time on this. Our article contains the basics, which will only be confirmed by the designs you find. But in this case, time will most likely be wasted.

Important technical details

Now let's briefly look at the basics of projector theory. The image on the screen lights up. Therefore, it is visible worse or better. The surrounding space is permeated with light from the rays of the sun. It is weaker indoors due to windows. The screen creates its own luminous flux. The larger it is, the more contrast and clearer the image on it.

Most of the modern screens we look at work in a similar way to a film projector. It contains a moving film, illuminated by a lamp, the brightness of which determines the image on the projector screen. In monitors, phones and similar screens, the film with liquid crystals is motionless, but also translucent. Light is emitted either by analogs of energy-saving fluorescent lamps or by LEDs.

To obtain an image comparable, for example, to the Rus film projector, the electrical power of our backlight must be the same as the power of the lamp in it. This is evidenced by the image shown below:

Cinema projector "Rus"

We see that for a good home theater you need a source screen with backlighting, lamps or diodes with a power of 9–11 W. Moreover, its size will affect the distance to the lens. The smaller the dimensions, the more compact the projector.

Optimal matrix option

Now main question: where can I get such a source screen? Phones and tablets are far from required capacities. Therefore, do not be fooled by projects from the Internet that claim a good projector from a phone or tablet. This will not turn out to be a home theater, but children's entertainment. Although such a projector will certainly be of interest to some readers. And since the review will be incomplete without the simplest projector, we will definitely talk about it later.

Each product is characterized by its price-quality ratio. In our case, instead of price there will be cost, that is, how much money and time will be spent on the projector. And, of course, what matters most is what happens as a result. The basis for the quality of the projection image will be the LCD matrix, bright lamp and lenses. At the same time, let us pay attention to the fact that the matrix does not tolerate overheating, which can result from the lamp. Consequently, the larger the matrix dimensions, the better it is cooled.

The best ratio of parameters

The matrix must be removed from a working device. But then restore all connections so that the device works. The best ratio of size and price is in monitors. There is very little left - a bright light, lenses and a body. Doing everything listed above from scratch with your own hands is time-consuming and difficult. To get an aesthetically pleasing device, you will have to experiment and order factory-made parts.

Therefore for best efficiency costs time and money, we recommend buying from good condition BU:

• 15-inch LCD monitor;
• overhead - A4 projector.

The matrix of this monitor is ideal instead of an A4 sheet for placement in a projector. You only need your own hands

• disassemble the monitor,
• extract the matrix,
• assemble the disassembled parts of the monitor so that the matrix works from the computer video signal,
• secure the monitor parts, including the matrix, to the projector body.

That's all there is to do. The only thing that needs to be created is to mount everything mentioned into a single device so that it can be moved from place to place without affecting its functionality. The rest of the work is disassembling the monitor. Let us further show with an example what such a projector design looks like.

The monitor has two blocks. One controls the matrix, the other controls the backlights. The purpose of the block is determined by the wires and cables

A little more - and the matrix can be separated

We try on the extracted matrix with the control unit to the projector

The projector is ready to use. What the image looks like is shown below:

A bookcase is visible to the right of the screen. By its size one can judge the height of the image - at least one and a half meters. Consequently, the screen diagonal is more than 2 meters. We can definitely say that the image quality in this projector is higher than that of its industrial multimedia counterpart. The latter uses the same principle, but the matrix dimensions are smaller and the optics are different.

Homemade multimedia projector

It is the dimensions of the matrix that mainly affect the clarity of the picture. As its size decreases, the picture quality deteriorates. Therefore, the only advantage of a multimedia projector is its small size. You can do it yourself, but it will take much more time. After all, you will need to implement the scheme shown below:

It is necessary not only to place everything in a homemade case, but also to ensure proper ventilation where it is needed, as well as the functionality of the gadget and its remote control. The costs of purchasing components will definitely be significantly higher in comparison with the design already considered. But, nevertheless, there are also homemade multimedia projectors. One of them is shown below:

It couldn't be simpler

The more complex the design, the fewer people want to repeat it. For this reason, it’s better to talk about the simplest projector that anyone can make with their own hands. The manufacturing process will take a little time. In this case, nothing will need to be disassembled. The essence of the design is simple - a smartphone is installed in the box, which transmits the image to the screen through a rigidly fixed lens. It is simply inserted with tension into a hole cut in the wall of the box.

For reliable fixation, glue is applied around the perimeter of the hole. The focal length of the lens should be half the length of the box. It can be easily identified upon purchase by shining a flashlight onto the table through the lens. You can use light from a lamp on the ceiling or the sun. The distance to the table from the lens at the smallest projection of the light source will be the focal length. The smartphone moves in the box to adjust the image. It is mounted in an improvised carriage:

To ensure acceptable quality of the projected image, it is better to select a diagonal size of less than 30 inches.

We offered three basic designs to those wishing to make a projector with their own hands. The choice is yours, dear readers.

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 inner part boxes and lids are black so that light does not reflect from the walls and does not interfere with the operation of the device. Wait for the paint to dry and begin cutting out the hole for the lens.

Remember that a magnifying glass is key element projector. The quality of the picture directly depends on it. Never buy cheap glasses with plastic lenses. Perfect fit glass lenses from tenfold magnifying glasses. If you have a Soviet magnifying glass lying around at home, use it. If you don't know which box to use, take a shoe box, it has suitable sizes. 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. Attach the lens to the hole and apply a little hot glue with 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 at 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 general cross section 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:

1. LCD matrix.
2. Fresnel lenses.
3. Fresnel lens holders.
4. Matrix holder.
5. Guide fastenings.
6. Screw fastening.
7. Guides.
8. Screw.
9. Sliding bearings.
10. Screw.
11. Lens carriage.
12. Lens holder.
13. Lens.
14. Focus knob.
15. Phone motherboard.
16. Display matrix cable.
17. Air intakes.
18. Loops.
19. 120 mm fan.
20. Cover border.
21. LED
22. Radiator.
23. 80 mm fan.
24. Lens hole.
25. USB phone connector.
26. Motherboard power cable.
27. Power supply and converter.
28. Fan power cable.
29. Ventilated compartment cover.
30. LED power cables.
31. Rubber feet.
32. 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 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 with inside walls with a 120 mm fan, and place 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.