Virtual reality helmet to make at home. DIY virtual reality glasses from a tablet and old glasses. Virtual reality games for smartphones and computers

Cardboard virtual reality glasses immerse a person in a completely new experience for him. With them, you can ride a rollercoaster or feel like the main character in your favorite horror movie without getting up from the couch. To do this, you just need to figure out how they are arranged and how to use them.

In order to preserve the cardboard casing, Google Cardboard is shipped folded only. Therefore, if virtual reality glasses were bought as a present, then the birthday boy will be pleased if his gift is pre-assembled. This is done simply and excitingly, reminiscent of a constructor or a puzzle. The main thing is to follow the step-by-step instructions and everything will work out. For complete convenience, we recommend laying out the case and additional parts as shown in the diagram below.

Step 1.

Insert the eyepiece with lenses (det. 2) into section 1.1. as shown in the figure. In this case, the front side of the eyepiece should be directed at you.

Step 2

Gently fold the body (det. 1), bending it alternately along the lines from right to left, i.e. from point 1.4. to 1.5. As a result, the eyepiece will be closed from 4 sides. In this case, it will be possible to combine its holes with the protruding parts of the eyepiece.

Step 3

To fix the resulting structure, we need to fix two sections. To do this, remove the protective layer from the self-adhesive strip 1.6. and fasten sections 1.4 with it. and 1.5. For strength, fit all protruding parts to the corresponding holes. If it seemed to you that the band 1.6. does not hold everything as securely as we would like, then you can use adhesive tape.

Step 4

Install the baffle (det. 3) into the holes of the eyepiece and section 1.1. Then insert the magnetic ring (det. 5) into the oval hole located in section 1.5. Touch your smartphone to the border between section 1.1. and 1.7. to assess the fit of his size with glasses. If the smartphone turned out to be smaller, then for comfortable use of the gadget, install an additional step (det 4.). Now it remains to drag the assembled body with a tourniquet (det. 6) to completely secure the structure.

Step 5

Attach a special elastic band to hold the glasses if you purchased them in the same kit with Google Cardboard.

Step 6

A smartphone with an Android or iOS operating system is the "heart" of Google Cardboard. Paste it into section 1.7. Launch the desired app and attach the lid to the Velcro fasteners. Now you can ride the rollercoaster ;)

Application search.

There are more and more interesting applications - games, virtual tours, videos, etc. To find applications compatible with your smartphone, use keywords:

• cardboard;
• google cardboard;
• stereo pair.

To search for videos on YouTube, use two tags - "stereo pair" or "sbs".

A few tips.

• Google glasses apps drain your phone's battery significantly. We recommend that you turn on the airplane mode or at least not go far from the outlet;
• some applications may put you in an active gesture state. Therefore, try to stand or sit further from objects that can be accidentally broken;
• using headphones, you can immerse yourself in the virtual world even deeper;
• it’s better to buy glasses along with an elastic holder so that your hands don’t accidentally drop the gadget at some unexpected moment.

Good afternoon (optional evening/night).

Today I will tell you about how you can make virtual reality glasses with your own hands, without phones(Traffic!):

FOREWORD

For now NO the official standard for VR goggles/masks and things like that. About Oculus, HTC, Samsung, Sony, etc. there is no point in talking and comparing. These are just devices with different functionality + / -, some gadgets. There is no point in arguing about what VR is, everyone sees it in their own way.

I have long wanted to play with this kind of thing, but phone glasses do not appeal to me, it is inconvenient, heavy and few applications, poor synchronization with the PC, phone battery, radio channel delay.

In the process of working on my experiment, 2 nuances that were important to me were highlighted:

1. Head tracking.
2. Display instead of phone.

Based on these nuances, I started building the unit.

I will say right away that the thing is in itself and does not pretend to be quality, everyone can repeat the manufacture of this helmet based on the instructions received.

ACCESSORIES

For glasses, I needed the following components:

materiel

The first thing to do is a warning:

All responsibility, namely independent penetration into the body of the finished product with subsequent violation of its integrity of performance, lies with the person who committed this action.

Frame:

The body will have to be assembled separately for the matrix, due to the fact that the matrix is ​​quite voluminous and a different focusing distance is required. Lenses need to be replaced. From this body the part applied to the head and nose will be taken.

Controller:

The main task is to synchronize the controller with the matrix, I knew that the controller and the matrix would work, but whether I would get the necessary permission is another question.

Here's an excerpt from the datasheet:

My display has an aspect ratio of 16:9 and a resolution that falls within the 1920x1440 range.

The problem is that the controller has the wrong resolution, and it needs to be flashed.

Initially, when connecting the display, instead of a picture, I got a set of stripes. (I even thought that the display itself was covered).

But after a while (when connected to a computer), it became clear that the display was outputting something, but it was clear that it had a problem with synchronization and resolution.

When flashing, I went through more than a dozen and settled on this version:

Now, when connected to a computer, the display shows information that the HDMI connector is connected and offers a resolution of 1024x600. In this case, the display is actively trying to receive a signal from the VGA, while the message appears - "Connect the VGA cable."

I had to scratch my head again. This controller is a direct analogue of boards with a large number of connectors, for example:

This means that you need to unsolder the buttons on your controller so that you can configure the display and switch operating modes. I am attaching the diagram for the connectors, the buttons hang on the 53rd leg of the chip:

Just in case, I am attaching the RTD2660 chip diagram:

After flashing and switching the controller to HDMI mode. The display began to start from under WIndows 7, my surprise was great when, in addition to the native, naive resolution of 1024x600, I was able to set the resolution to 720p and 1080p. At 720p it works fine, it doesn’t distort, but at 1080p the fonts are no longer readable, but it holds it just the same, surprise, running games at 720p is more fun than at 1024x600 (not all games support low resolutions).

Matrix:

I have already played with glasses on the phone, the resolution was 960X540. I launched Half-life 2, Portal, but I didn’t like that it was a phone and that you couldn’t look at the space with your head, rotated the mouse + Wi-fi delays, just pissed me off and didn’t let me play. In general, the pixels are visible, but I still liked it.

A 7-inch 1024x600 matrix was removed from the parts box, part number 7300130906 E231732 NETRON-YFP08. Based on the available resolution of the matrix, we can conclude that for each eye the resolution will be 512x600, which is slightly more than the phone screen resolution and, most importantly, there will be no delays.

The matrix connector has 50 pins and is fully compatible with the display controller.

To achieve maximum contrast and juiciness of the image, you will have to remove the matte film from the matrix. Since the product will be closed, any glare is not terrible.

Matrix refinement is carried out in 7 stages:

1. parse the matrix along the edge of the frame;

2. put the module on the lining (here you can stick the edges of the module to the lining with adhesive tape so that water does not spoil the part);

3. a damp cloth is placed on top of the display, preferably the size of a matte film;

4. the napkin is gently soaked with a small amount of water about 25 degrees;

5. we wait about 2 - 3 hours, it all depends on the quality of the coating. (adhesive for matte films is sensitive to water);

6. gently pry off the edge and slowly, without jerking, remove the matte layer;

7. check.

If you want to collect points on a 2K display, then I will give you a link:

For this price on Ali, you can buy a finished device with FullHD ->

Therefore, I did not spend money on the concept and decided to use what is available for testing.

Arduino and gyroscope:

The most important part of getting the effect of presence in a game, application or video is the ability to control the head, which means we will write head tracking.

Excerpt from official source for Arduino Leonardo:

Unlike all previous boards ATmega32u4 has native support for USB connection, this allows you to set how Leonardo will be seen when connected to a computer, it can be a keyboard, mouse, virtual serial / COM port.

That's exactly what I need.

The gyroscope was chosen as the simplest and most common - GY521, it has an accelerometer on board:

1. Accelerometer ranges: ±2, ±4, ±8, ±16g
2. Gyroscope ranges: ±250, 500, 1000, 2000°/s
3. Voltage range: 3.3V - 5V (the module include a low drop-out voltage regulator)

Gyro connection:

#include #include #include #include MPU6050mpu; int16_t ax, ay, az, gx, gy, gz; int vx, vy; void setup() ( Serial.begin(115200); Wire.begin(); mpu.initialize(); if (!mpu.testConnection()) ( while (1); ) ) void loop() ( mpu.getMotion6( &ax, &ay, &az, &gx, &gy, &gz); vx = (gx+300)/200; vy = -(gz+100)/200; Mouse.move(vx, vy); delay(2); )

Based on the sketch, we can conclude that head tracking is essentially a gyro mouse.

CONCEPT

It all came down to the division into stages:

1. fitting head tracking;
2. writing tracker firmware;
3. ordering the necessary controller for the display;
4. setting up and launching the display with the controller;
5. fitting and general assembly.

This is how debugging a head tracker with a gyroscope looked like:

Head tracker video:

Launching a display with a controller:

To run the display, I need the Tridef 3D program, which allows you to run games and applications with the Side by Side image, which I used as a test.

The reason for using it is quite clear, these glasses will not be recognized as Oculus DK1 / DK2 glasses, and in order for the device to be recognized as VR glasses of at least the first revisions of the oculus, it is necessary to completely change the display controller software, which I can’t afford yet, so but either partial prototyping will be required, or a board concept should be created again based on such gyroscopes that are used in oculuses -

But due to the fact that I decided not to spend a lot on this project and I am not going to make money on it either, we will leave this for other people. (I know who makes sets with oculus firmware based on such smart glasses, but I will not advertise them, the post is not about them)

Frame

Having played enough with a standard body, I decided to try on the matrix for it and was very disappointed, the matrix turned out to be too large for the focal length, I saw everything but did not see the whole picture, it did not add up into a single one.
The assembly of the hull began from scratch.

Having broken off all the protruding parts, as well as fastening the belt for the head, I received the following set:

Actually, like many prototypes, I chose corrugated cardboard as the most flexible, easily accessible material:

Testing

In the process of testing, the glasses showed themselves extremely well, it is a pleasure to play at 720p resolution. The gyroscope works fine and works out head movements, the mouse does not float along the coordinates, I passed the cable through my head behind me, 3 meters was more than enough.

Nuance:
The glasses stick out quite a lot, although the mass is not very large, you have to get used to turning your head.

The disadvantages of such a system:

1. You need a smaller matrix in order to reduce the length of the body.
2. We need high-quality lenses (for mine I took them from magnifiers in the nearest print shop).

In general, for myself, as an undemanding person will go.

As I play enough with all this, I will make an 8D projector out of this matrix and controller. (Watch the reviews)

Thank you for your attention, patience will be happy to answer your comments.

Virtual reality glasses allow owners to move into a completely different world - three-dimensional. Such glasses cost a lot of money, however, we suggest that you do not rush to go to the store or order them in online stores, since such glasses can be made at home.

First of all, we suggest devoting a few minutes to watching the author's video

What do we need:
- a smartphone running Android OS;
- two lenses;
- pen;
- ruler;
- cardboard box;
- scissors.

Before starting manufacturing, we note that we recommend using lenses from an old unnecessary flashlight. We also clarify that the cardboard must be chosen dense so that it can hold the mass of the smartphone.

Let's start by cutting out all the necessary details from the cardboard box. In the figure below, you can see a diagram of cardboard blanks, according to which you can prepare all the details.

Now you need to insert two lenses into a separate piece of cardboard. To do this, on a piece of cardboard you need to make two holes. In principle, if the holes turned out to be slightly smaller than the diameter of the lenses, then this can be considered a plus, since in this case the lenses will be inserted into the cardboard in a very dense way.

You can leave for a while and start downloading the Cardboard application to your smartphone, a demo version of which can be downloaded from the Play Market. In principle, in the open spaces of the network you can find an already hacked full version of the application.

If you wish, you can improve the glasses by adding Velcro to better fix the smartphone in them, as well as add fasteners for comfortable wearing glasses on your head.

An interesting story turned out with Google Cardboard, in general, Google developed them for the exhibition as a mockery of the ever-increasing trend of virtual reality, but the idea went to the masses and now 3D glasses for smartphones are one of the trends.

In the android market and the iOs app store, you will find many games and entertainment applications for Google Cardboard, they are both in the paid section and in free programs.

How to make 3D glasses for smartphone

DIY Google Cardboard is very easy, download the blueprint from the link below, insert two lenses and assemble these homemade 3D glasses using your smartphone as a screen.

Download Google Cardboard drawing Can .

The only problem can be lenses, you need biconvex magnifiers with a diameter of 40 mm, magnification 3x, focal length 80 mm. But they can be ordered online.

Look at the animation how to properly assemble 3D glasses from cardboard.

As you can see, no problem.

By the way, people make a lot of money on these 3D glasses!

During the passage of the Geek Picnic 2015 festival, these cartons were sold “only for 990 rubles”!

The funny thing is that this Google Cardboard set can be ordered from China for $3!!!

But the visitors liked the cardboard 3D glasses!

And many who do not know their true price - bought, and took more than one copy, but also with them to make a gift to their loved ones.

Google Cardboard 3D glasses work with almost any Android smartphone or iPhone. For Android, the only limitation is that the OS must have a version of at least 4.1.

The native Cardboard app for Android is a set of mini-utilities that demonstrate the capabilities of 3D glasses. All applications are displayed in the form of a ribbon of icons, moving through which is carried out by turning the head left and right. The very first thing is to launch the Tutorial program - a very short and simple video that teaches you how to work with 3D glasses.

In addition to the instructions, the package includes the following applications:

Earth: You can fly on Google Earth 3D maps.

Tour Guide: Visit Versailles with a local guide.

YouTube: Watch popular YouTube videos on a virtual screen.

Exhibit: Explore cultural artifacts from every corner of the planet.

Photo Sphere: View your own or other uploaded spherical photos.

Street Vue: Drive through Paris on a summer day.

Windy Day: An interactive cartoon from Spotlight Stories

Also pay attention to the VR Cinema program.

VR Cinema for Cardboard - Virtual Reality Cinema for Cardboard

Thanks to this app, you can watch movies on your VR display. The app splits any MP4 video. The screen is divided into two halves with the same picture on both sides. It's not true 3D, but the feeling is comparable! The video is downloaded from the memory of your gadget or from Google Disk. VR Cinema allows you to watch videos captured on the camera of your gadget. The app also has a VR camera feature that uses the front camera. Funny effect, but I did not appreciate it. The application has not yet been finalized and it is felt. In the next versions, the developer promises to introduce control using a magnetic ring, the ability to transfer video online and increase the number of processed formats.

If you can't get lenses or they are offered to you at a price higher than $3, then order ready-made Google Cardboards worth $3.2 right away!

You will only need to fold these 3D glasses from the disassembled state, insert your smartphone into them and you can enjoy 3D reality!

Buy Google Cardboard Can

At first glance, the assembly scheme looks quite simple - a regular smartphone and a pair of lenses. However, in reality, everything is much more complicated, if only because the process will require quite serious knowledge in the field of optics.

Let's not forget that huge efforts and funds are invested in the development of the devices we are considering, most of which is aimed at finding components that are optimal for the user's eyes.

If you are interested in the question “How to assemble Google Cardboard glasses?”, Then we bring to your attention the simplest version of the concept of self-assembly of virtual reality glasses.

Do-it-yourself Cardboard Assembly Scheme

Firstly, we need a smartphone running OC Android with a special Cardboard application installed on it, a sheet of cardboard, adhesive tape, a ruler, a pencil and a knife. As you can see, nothing complicated. In this case, in the end we get a fully functional device. Don't forget to download Cardboard drawings with an electronic version of the template. The whole thing takes three A4 sheets and must be pre-printed on a printer.

Cardboard scheme for printing

First, we turn a sheet of cardboard into a VR glasses case. The easiest way to do this is with scissors. The result should be three walls: left, right and back, the front is not required.

The next design element is two biconvex lenses. The longer their focal length, the better (optimally - 40 mm). Do not forget to make holes in the back wall of the case for their installation. Next, we fix the optics with adhesive tape.

After that, you can start adjusting the image. To do this, you need to place the smartphone with the display towards the lenses and, moving it in different directions, determine the position at which the image clarity will be maximum.

The Cardboard app lets you watch videos or launch Google Street View, a panoramic scene viewer that lets you take virtual walks through distant metropolises.

Technology needs investment

The scheme of the device of virtual reality considered by us earlier is extremely simple. Helmets from the world's leading manufacturers are distinguished by a much more complex design and "advanced" functionality. Our sample can not boast of having a gyroscope and an accelerometer, or the wear resistance of the case, or ergonomics. We strongly do not recommend that you use this device for a long period of time, it may be unsafe for the eyes, since no optics specialists took part in the assembly process.

However, even if superficial, but very revealing impression of the operation of such devices, the gadget we have assembled still gives. In addition, it is an incredibly rewarding experience to make virtual reality glasses on your own, the characteristics of which are quite comparable to the best factory samples.

To ensure the operation of glasses, only special lenses and a software package were required, which allows you to track the position of the user's head in space and performs general control of the system.

However, in order to get a truly high-tech device, the ability to assemble at home alone will not be enough, you will need a serious, well-organized and well-funded business project.

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