Self-production of a holographic three-dimensional pyramid. Holographic pyramid Size rules

Useful tips

You can turn your smartphone into a holographic one 3-D player thanks to a simple project shown in his video by a user named Mrwhosetheboss.

This user created a special device, which, together with a video sequence created specifically for the hologram, creates the illusion of a 3-D picture floating in the air.

You will need:

Old CD case

Sharp knife

A little duct tape

Ruler

Squared paper.

1. Draw 3 trapezoids on paper with dimensions of 1 cm x 3.5 cm x 6 cm.

2. Cut out the trapezoid.

3. Take the case for discs, carefully remove the sides, circle the trapezoid cut out of paper 4 times.

4. Using a utility knife, cut out 4 trapezoids.

5. Glue all the trapezoids together to form part of the pyramid.

6. Download demo video to your smartphone and use this design to view the hologram.

Here are some video clips that can be used for this technology:

How to make a hologram

Holographic video

Video clips that are used for this device are play the same picture on four sides.

When all these four video series are reflected in the panels of the created device, you get the illusion of a 3-D hologram.

Holographic effect

Unfortunately, such an illusion cannot be called a hologram, because Here 2-D pictures and videos are used to create the desired effect.

A true hologram creates a 3-D image and uses technology that separates laser beams.

Now you will learn how to make a 3D holographic pyramid with your own hands at home. Of course, you can buy it in an online store, but its price there is quite high. Therefore, we will make a holographic pyramid from scrap materials and, of course, at home.

Required

1. Glue gun or just a tube of glue;
2. stationery knife;
3. A strip of transparent plexiglass (plastic from a CD box may be analogous);
4. Pliers;
5. A stencil on which we will cut out shapes for the pyramid
6. A smartphone on which a video for a holographic pyramid is downloaded. You can download it at the end of this page;
7. Double-sided tape;
8. Sandpaper.

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Step-by-step process for creating a pyramid

The stencil of a holographic 3D pyramid has the dimensions shown in the picture

A prerequisite is that the angle must be 45 degrees.

Video for holographic pyramid

In order to create a hologram, you need to upload a special video. Content for a 3d pyramid is quite difficult to find. Here we will post several popular videos that can be downloaded.

Video instructions on how to make a holographic 3D pyramid with your own hands

Where can I buy

You can buy such a pyramid on Aliexpress. It is made very carefully and is usually adapted for any device, but the price starts from 1500 rubles. Here are a couple of links where you can buy one.

In this video tutorial, Roman will show clearly how you can make a 3D hologram pyramid. Such a small pyramid costs about 2,000 rubles on the Internet. However, it turns out that you can save money and make a holographic projector that will work on a phone base with your own hands. If you don’t want to do it yourself or are not satisfied with handicraft production, you can purchase it in an online store.

To make a projector we will need:

glue gun;

stationery knife;

transparent plastic from the CD case;

pliers;

mobile phone;

The photo shows a drawing of a holographic pyramid.

Please note that the angle of inclination of the side faces of the pyramid must be exactly 45 degrees.

First, temporarily glue the stencil onto double-sided tape. Next, using a stationery knife, we make deep cuts and then break them off using pliers, holding the workpiece in a vice. We smooth out the chips of the resulting workpiece using sandpaper.

We repeat this operation three more times to ultimately obtain four identical blanks.

When the blanks for the 3D illusion are ready, we will free them from the backing and glue them together to form a pyramid, or more precisely, a truncated pyramid.

That's all. The holographic projector is ready!

You need to install the pyramid upside down exactly in the center of the phone display. Place a cardboard square on top; it should be dark in color.

Now we launch the video and watch the hologram in action from any side.

Holographic three-dimensional pyramids are sold in online stores and cost a lot of money. We suggest that you do not rush into purchasing such a pyramid, since you can make it yourself. This is what this review is about.

So, we will need:
- glue gun;
- stationery knife;
- transparent organic glass;
- pliers;
- stencil;
- a mobile phone with a special holographic video.

If plexiglass is not available, you can use the transparent plastic of the disc box. Links to videos will be provided at the end of the review. Note that the width of the upper part of the stencil is 10 mm, the lower part is 60 mm, and the height is 35 mm. It is also important that the pyramid is located at an angle of 45 degrees.

A device with which you can draw entire color pictures in the air. And no, I'm not exaggerating one bit.

To capture such a picture, the shutter speed when taking a photo should be about two to three seconds. In addition to a digital camera, this shutter speed can be obtained on a regular smartphone camera using various camera applications. Photos from today's device look something like this.

For assembly you needed:
1. The address tape itself. The author took a resolution of 60 LEDs per meter and mounted it on a metal profile.
2. Next you will need a micro sd memory card and a module to connect it. The map will contain image files for drawing.
3. Button to start animation.
4. And of course, the arduino nano platform, which will manage all this.
5. Also in the original circuit there is a potentiometer to adjust the brightness and speed of the animation.
6. The tape requires a power supply of 5 volts, and in the bright areas of the image it will take a decent current. Therefore, we will be powered by a Chinese power bank.

Before you start, you need to prepare a memory card and the images themselves. The card needs to be formatted in fat format. And so that no additional questions arise, we will format it using the official utility, which only has a format button. The program is included in the archive with the project (link at the end of the article).

The next preparation step is the images themselves. They also have a number of strict requirements. First, the width of the image should be equal to the number of LEDs in your strip. Secondly, the image must be in bmp format with a color depth of 24 bits. Third, the image is positioned vertically from bottom to top, with the top side of the image facing left. To prepare images, you don’t need any supernatural programs; standard Windows paint is enough. But it’s better to download free paint.net, because you can work with layers in it, and this will be useful to us. Let's look at the example of the classic -nyan cat. It is an excellent picture for this type of effect. We find a picture on Google, I’ll immediately note that where the color is black in the picture, the LED will not light up. If you want to draw a picture without a background, that is, without a background, then you need to find either a picture on a black background, or download the picture from png format with a transparent background.

Open our picture in paint.net. First of all, fill the background with black. To do this, create a new layer, place it down and fill it. Now let's rotate the picture and flip it around so that it fits as needed. We change the width of the image by the number of LEDs (the author has 60 of them). And now all that remains is to save it in bmp format with a color depth of 24 bits. All.

Now go to the project page and download the archive. Here you will find a collection of ready-made images, as well as all necessary programs, firmware, diagrams and instructions. For those who have not encountered arduino, there is a separate ultra-mega-super detailed article.

I recommend doing the first launch without disconnecting from the computer and opening the port monitor, there will be a bunch of stuff here useful information. After each change or addition of pictures to the memory card, you will need to start the system with the button pressed, then the image conversion mode will turn on and each of your images will be converted. Also, during the first run, the potentiometer acts as a brightness control knob, because the brightness is adjusted during the run-up phase. Also, the first launch is important because you can see all possible errors.

In general, after a successful download and a bunch of OKs, you can disconnect and perform further launches without pressing a button. Now everything is extremely simple, turn it on, wait a little and when you press the button an animation will be shown. The next time you press, the next picture from the card will be shown, and so on in a circle. The potentiometer now adjusts the animation speed.

We set the camera to a shutter speed of two or three seconds, turn on the timer and go back to the starting point. The result is an image magically frozen in the air.

The thing turned out to be cool, but there is one huge drawback - it is stupidly inconvenient, and if you have more than 10 pictures on the card, then it’s completely trash, it will be impossible to choose the one you need.

Let's expand the capabilities a little and add a display. We use the following display:

Turn on the power, grab the body, press the button and draw. As for the launch and settings: after any addition or change of an image on the memory card, you need to start with processing (in this version, for this you need to press the encoder and apply power, the start message appears, release the button, the preparation message appears). Preparation takes a few seconds, depending on the number of images on the memory card and their length. Now we are asked to select brightness. Brightness varies from 10 to 95.

The maximum brightness is limited not by the brightness of the tape itself, but by the current that we configured in the settings, that is, it all depends on your power source.

In general, now we select the picture we need, that is, we need to know what number it goes under, press the start button and the animation plays.

To set the speed, hold down the encoder button, the inscription sp (speed) appears and while holding the encoder pressed, you can set the speed.