A device that allows effective observation in conditions where there is no light at all or there is not enough light to construct an image with the naked eye. Similar conditions can be observed both outdoors (moonless cloudy night) and indoors (basement without windows or electric lighting, attic, etc.)

Modern NVGs mainly use two operating principles:

• Passive. They capture a few quanta of visible light, amplify them many times with an electron-optical converter (EOC) and create a visible image. Such devices do not illuminate the target with any radiation, so the fact of observation cannot be detected. The main disadvantage of this design is its complete uselessness in the dark.
• Active. They illuminate the target with radiation belonging to that part of the spectrum that the human eye cannot see. Most often, infrared radiation plays this role. The illumination device can be an infrared illuminator, LED or laser. A device with infrared illumination can work even in conditions of complete absence of natural light. However, the flow of infrared radiation (although it is not visible to the naked human eye) can be detected using another NVD, and the fact of observation will be detected.

Many devices combine both principles, acting as passive devices in the presence of at least some natural radiation, and in the complete absence of light, switching to infrared illumination.

It is easier to implement a home-made design using the active principle, so further we will talk about such devices.

How to illuminate a target with an infrared beam?

There are also two main schemes here. The first assumes that a laser or LED is used for illumination, which emits infrared light with a wavelength invisible to the normal eye. The laser generates a very narrow beam, in addition, it operates in short pulse mode, which makes the illumination noticeably less detectable.

Such schemes are quite compact, but illuminate the area only within a fairly narrow cone. The visibility of such a scheme is limited, so it will be more difficult to detect targets against the background of the landscape. Such devices are better suited for tracking targets that have already been detected.

A much wider field of view can be achieved by using an infrared spotlight to illuminate targets. In this device, the lamp is placed in a reflector cone, and the cone aperture is covered by a lens made of material that cuts off all waves except infrared radiation. This type of spotlight illuminates the surrounding area with a wide cone, creating a sufficient field of view. The range at which you can notice a target and distinguish it against the background of the landscape depends on the power of the lamp and can reach up to half a kilometer for the best factory samples.

How to convert infrared rays into visible light or see the invisible?

Once we have created an area of ​​infrared illumination, the question arises: how to detect the IR rays reflected from the target if we cannot see them with our eyes? To do this, you will need a device called an electron-optical converter (EOC). The image intensifier performs the following actions with infrared light:

• Collects infrared radiation emitted by the illuminator and reflected from the target.
• Converts captured light into a stream of electrons.
• Strengthens the flow of electrons using an amplifier (not all image intensifiers have this capability).
• Converts a stream of electrons into light visible to the eye of an observer or recorded by a video camera.

Today, several generations of image intensifier tube designs have already changed. Each subsequent generation gives an increasingly better picture, but the price also increases significantly, which is associated with the use of increasingly complex and expensive components in the design. At the same time, even first-generation converters create an image of quite acceptable quality, suitable for solving many problems.

What will you need to make it yourself?

To make glasses we need several components:

• Device that captures IR light. Any camera that has a night mode can play this role. It is clear that the camera should not be too expensive, otherwise its use in the design will be unprofitable. For a night device that lacks stars from the sky, a webcam is suitable, but it will require a little modification. You need to remove the infrared lens from it - an IR wave filter. Now the camera can be used in night mode using infrared illumination.
• Infrared wave source. To do this, you can use a ready-made infrared flashlight (the simplest, but most expensive option). If you don’t have enough budget, you can use a regular LED from a TV remote control as IR illumination. Its power is not enough for constructing an image at long distances, but for illuminating, say, a staircase or other similar space, the light will be quite enough.
• Power supply. It is desirable that it be sufficiently scarce and provide decent autonomy for the device. AA and AAA batteries or accumulators look good in this role. For more complex stationary devices, you can also take care of a device that provides power from a household electrical network.
• Auxiliary elements- the last group of things needed to create homemade night vision goggles. They are not directly involved in creating the image, but they protect the circuit from dust and dirt or increase the comfort of use. It is worth taking care of some kind of pencil case as a case and a bracket for mounting on glasses or a helmet mask from headlamp. The bracket can be made, for example, from parts of a children's metal construction set.

The details are ready. What's next?

A black and white micro camera, for example, JK 007B or JK-926A, can be used as a device that will catch IR light. We are looking for a simple video finder for the camera. If you don’t have anything suitable in your supplies, you can pick up an inexpensive part from a consumer electronics repair service. It is important that the video finder receives video using the same protocols in which the microcamera creates it.

We purchase IR LEDs in a store or online. The purchased diode must be checked by looking at its light in a dark room with the naked eye and using a night camera. In the first case, the light should not be visible, but in the second, it should be clearly visible. Now we mount the tested LEDs in any box that will serve as a housing (for example, a children's plastic pencil case).

Foreign amateur designers recommend a circuit of two garlands of six diodes each. As a shunt - a resistor with a resistance of 10 Ohms for all diodes. Now you can supply power from a regular battery. When using another LED, check the shunt value using reference books.

The camera lens must be placed in the same plane as the LEDs (in the same housing). We attach the video finder to the side, connect the power and place the assembled device on the frame or helmet mask. Now our device is ready, and we can try it for night monitoring.

As you can see, with a little skill and knowledge of how to get down to business, you can assemble a fully functional night vision device with your own hands. Of course, before assembling, it’s also a good idea to familiarize yourself with the prices of commercially available devices, so as not to reinvent the wheel, but to use a factory solution if the cost benefit is not too large.

Every physical body is capable of reflecting or emitting infrared rays (IR). It is this feature that is taken at the forefront by the designers of night vision devices. Their action is based on the so-called internal photoeffect. When an infrared image is projected somewhere, then the electrical conductivity of the irradiated areas of the photosemiconductor (2) becomes different on the adjacent electroluminescent layer (4), and in this case there is a potential distribution, which, in turn, corresponds to the distribution of the brightness of the image on the photographic conductor. In order for this process to take place, it is necessary to provide alternating voltage to the transparent electrodes located at the edges electric current with a value of 250-300 Volts at a frequency of 400-3000 Hertz, and the current should not exceed 10 mA.

How to make a night vision device yourself.

Let's start! In order to construct a night vision device yourself, you need to take chemical elements from the chemistry classroom at school or in the chemical laboratory of a separate plant or factory. They will be needed to make it.

First of all, we take two small glass plates, as well as the chemical compound Sn Cl2 (tin chloride), silver (Ag), ZnS (crystalline zinc sulfide) and Cu (copper). The glass pieces need to be heated for about 4 hours in a solution of strong acid H2SO4 and potassium dichromate K2Cr2O7, and then dried thoroughly. Then you need to take a cup - preferably made of porcelain - and pour it into it. Then take a porcelain cup, put tin chloride SnCl2 in it and put it in an electric stove. Above this stove you need to attach pieces of glass somewhere at a distance of no more than 7-10 centimeters. Next, you will have to cover the porcelain cup with a metal plate. Turn on the electric stove.

As soon as the stove heats up to about 400-480˚, you will have to take a metal plate from there. Make sure that there is an extremely thin conductive coating on it. Then you need to turn on the oven again and put the glasses on the table and let them cool completely. You will need to check this very coating with a tester. Next, you will need to apply a photosemiconductor to one of these plates. To do this, it is necessary to prepare the same amount of a three percent solution of thiocarbamide Na4 C(S)NH2 and a 6% solution of lead acetate. These solutions must be poured into a glass vessel. Using tweezers, insert a glass plate into the solution, holding it upright. Before this, you need to apply varnish to the side that is not covered with a conductive coating. Wear rubber gloves and carefully pour the concentrated alkaline solution into the vessel with the plates to the very top. Carefully and carefully stir the resulting mixture with a glass rod, being careful not to touch the plates. After 10 minutes, the plate will need to be carefully removed and washed with a stream of distilled water. Next you need to dry it all. Turn on the stove and pour silver (Ag) into a clean porcelain cup. Repeat the process we described at 900˚. Coat the photo semiconductor wafer. In this case, it will be necessary to ensure that there is a mirror film there. To make a phosphor, you need to prepare pure crystals of zinc acetate ZnS. It should be noted that in the presence of impurities, the brightness of the glow will drop significantly or disappear altogether. Prepare the stove. Place Cu in a porcelain cup. Its copper crystals and ZnS zinc acetate crystals should be as small as possible in size. The proportion must be observed as follows: ZnS - 100%, copper - 10%. Copper vapor must circulate in the stove and pass through the gaps between the crystals. Do not grind the resulting crystals under any pretext! You will then have a colorless powder. Mix the varnish with the crystals. Use as little varnish as possible. Pour the mixture onto the silver plate and wait until it spreads completely and forms a smooth surface. Place a second strip of conductive coating on top of the varnish and lightly clamp it. When everything dries, the resulting night vision device must be sealed. After all these manipulations, having applied a conductive coating, solder the wires as leads along the edges of the plates.

Assembling a night vision device

All that remains is to assemble the high voltage generator and put it all in the same housing. Its shape is arbitrary, but we recommend the one proposed by most developers of night vision devices (in the figure). The lens in it can be taken from any photographic camera, but best of all is a short-focus one (say, from a Smena-8M or FED camera. Any biconvex lens can act as an eyepiece. When you put it all together, you need to check everything connections for strength and correctness. When you turn on your new night vision device, you will definitely hear a thin squeaking sound from the transformer. Without seeing any image, do not be upset - you can change the level of the supplied voltage or the frequency of the generator. Set the maximum sensitivity.

Enjoy your observation!

1. glass plates;
2. photographic guide;
3. silver (Ag) layer;
4. electroluminophor;
5. photographic lens or lens.

Resistor R2 changes the frequency of the generator.
The transformer is wound on any core and contains:

• Winding I contains 2000 - 2500 turns, wires - 0.05 - 0.1 mm;
• Winding II contains 60 turns;
• Winding III - 26 turns, wires - 0.3 mm.

Optics/NVD

Today we will not touch on the medieval alchemical method to make a night vision device with our own hands. This is, of course, simple if you have sulfuric acid and a little tin chloride at home, but we think this approach is somewhat dangerous. Therefore, the work plan for today is as follows: we will briefly discuss the principle of operation of a night vision device, we will tell you what it can be assembled from if you cannot sit still, perhaps we will make a short excursion into the topic of what is available in the store in this area.

The night vision device includes:

1. Converter of infrared radiation to video signal.
2. A kind of eyepiece that could display the signal in real time.
3. Backlight.

The store has many devices that allow you to shoot in the dark. A night vision device should obviously be based on one of them. A black and white micro camera will do just fine. It is not very cheap, but you can use it for something else if you get tired of the night vision device. An example of such devices is JK 007B or JK-926A. The main thing is that the device has a video output, and any camera has it, otherwise why would it be needed at all! The purchase price should not greatly exceed the store price of the night vision device (see above), otherwise greed will stifle it. Take comfort in the fact that our device will be able to do logging, which costs even more money on the counter.

You need to find an old viewfinder. To do this, you can go to a salon that repairs household appliances if you don’t have suitable equipment at home. The viewfinder must have a video input using the same protocol as the camera transmits.

This question can not only be clarified with local professionals, but also checked there by connecting the devices with a cable. If everything works, then all that remains is to buy the backlight. Order LEDs online or buy them at your nearest market. How to check? We also have a video camera for shooting at night. Go into the dark, turn on the power and see if the radio element glows. To do this, just point the video camera at him.

A foreign do-it-yourself enthusiast recommends combining a dozen LEDs in garlands of 6 pieces per branch. They must be equipped with a 10-ohm shunt for the entire bunch, after which power can be supplied from a regular battery. It is difficult to reverse the polarity, but just in case, use a special reference book for LEDs. The backlight block is ready. LEDs are mounted on any case, it can be an ordinary children's pencil case or something else of the same kind.

Actually, everything is ready. It is necessary to connect the camera and viewfinder with a video cable, and place the lens in the same plane as the LEDs. Considering the size of the devices, they can fit into one pencil case. The viewfinder is mounted on the side. For the recording device, you will need to install the appropriate connector into the housing. Night vision devices from China cannot compare with ours! Here's how it works:

1. The night camera captures your surroundings.
2. LEDs illuminate objects for better visibility.
3. The viewfinder begins to receive an image visible to the eye.
4. If necessary, registration is carried out through a special connector.

Don’t be surprised if distant objects are not visible; the LED beams cannot reach them. Such a night vision device also has disadvantages: there are no glasses, the cost of new all components is quite high, it is necessary to purchase batteries and place them in the case. But we explained in simple language operating principle of the device. Our goal was to show how to make a night vision device from improvised materials. However, there are probably a couple of reagents lying around in the chemistry lab. Try talking to the teacher!

Shop night vision devices

The Cyclops night vision device is so named because it has a monocular instead of glasses. This would be just what a one-eyed giant would need. Like all others, this night vision device is characterized by three parameters:

1. Resolution in arc minutes. That smallest part of the viewing sphere that can still be distinguished from the neighboring one.
2. Gain.
3. Line of sight.

For the devices to work, at least a faint reflection of the stars is enough, and if the Moon rises in the sky, the picture will become completely clear. These celestial bodies will illuminate the landscape no worse than the LEDs we talked about above. Of course, if you look at the sky, you can study Ursa Major and Ursa Minor, but all this will be filled with a whitish glow.

The Zenith monocular night vision device has a built-in backlight and a piezoelectric energy converter for power supply. There are also scopes under this brand, so don’t confuse one with the other. There is a lens adjustment especially for people with poor vision. These are already night vision goggles for reading in the dark!

NPF Dipol also produces night vision devices, but at an affordable price they are no different. However, you need to look at what exactly the device is for. If you have the opportunity to pay about 190 thousand rubles for glasses, then for this money you can buy from Belarusians a real cool device for viewing the surroundings at night.

Operating principle of a night vision device

The eye is a passive radar, that is, it receives radiation that comes from objects. But the visible spectrum is only a small range of vibrations on the body of the universe that surround us. In particular, the predator from the film of the same name could switch ranges, but even he could not see the whole picture! The eye cannot see in the dark because we cannot observe infrared radiation. All bodies will emit waves, especially at low temperatures. Therefore, the first night vision device is emerging. He has nothing to do with the military. Builders use it.

Meet the thermal imager, which receives thermal radiation from objects. The device itself is not designed to see in the dark, but you can see something on it. It has a number of settings, but in a typical state:

• temperature of about 10 degrees Celsius heat appears orange glow;
• the walls of the houses look reddish;
• The surrounding inanimate nature can have a variety of shades, even black.

It is unlikely that you will be able to assemble a thermal imager with your own hands, but it is quite possible to buy it for 50 thousand. And for seven thousand you can buy a night vision device (NVD) in a store. Usually there is no point in taking a thermal imager specifically for vigil in the dark, because it serves builders, for example, for the purpose of assessing the quality of thermal insulation work. But if you find a foreman you know, then you can, of course, admire nature in the dark.

The circuit of the night vision device is also based on these processes, but in order not to irritate the eye with such an unusual rainbow, inside the factory product there is a transparent plate covered with semiconductor material, which, due to the internal photoelectric effect, allows you to “see” infrared radiation from objects.

For reference. The photoelectric effect is the phenomenon of the transition of electrons in a material to new energy levels under the influence of photons of light. Strictly speaking, it is incorrect to use this term for invisible radiation, but this is how it is used in the literature, so we will not contradict other sources in any way.

Under the influence of invisible “photons,” the electrons in the plate gain energy. Information can be read by changes in the transparency of the material or its conductivity. In particular, microchannel technology for manufacturing sensitive elements makes it possible to avoid illumination on neighboring pixels. The Nazis were the first to approach the solution of the problem. Many talented scientists worked for them. Some voluntarily, others, according to some sources, were forced. A scope was even created for a rifle weighing 2.25 kg with a suitcase of batteries (13.5 kg). This would probably have made it possible to accomplish many feats (or crimes) if Soviet troops had not taken Berlin in May 1945.

Sometimes the radiation is further amplified, for example, by photomultipliers. This allows you to get a brighter and more contrasting picture in a night vision device. But often there is not enough external radiation, and then illumination in the infrared range is used. Lamps can also be used for this, but most often semiconductor diodes of a special type are used. You can find these in any store. By the way, the coherence of LED radiation is very high. This means that interference will not affect the picture quality.

For reference. Coherence refers to the concept of being in phase with a wave. It doesn't matter what this means - we need to know that such light is concentrated in a very narrow part of the spectrum, and in addition it is easily combined, giving greater brightness than any other sources of radiation. As a result, you can get high-quality illumination at low power. (See also: The principle of operation of a night vision device)

So, night vision devices are divided as follows:

1. By the nature of the impact on the environment:
   1. Active with LED backlight.
   2. Passive, receiving only radiation from other objects.
2. According to the method of processing the received signal:
   1. With amplification.
   2. No gain.
3. Based on the presence of a drive:
   1. Registrants.
   2. Not registering.

Well, that’s all we need to know to assemble a night vision device with our own hands.

Today we will skip the medieval alchemical method that allows you to make a night vision device with your own hands. You can easily manage it if you have sulfuric acid and tin chloride stored at home, but the authors consider such an approach dangerous and unreasonable. Today's work plan: we briefly discuss the principle of operation of a night vision device. We’ll help you collect it, if you can’t sit still, perhaps we’ll make a short excursion regarding the stores: we’ll discuss stale items from the field of hunting equipment.

Operating principle of a night vision device

The eye is a passive radar and receives radiation emitted by objects. The visible spectrum is a small range of vibrations of the body of the Universe surrounding humanity. The predator from the film of the same name switched bands, a representative of an advanced civilization is unable to cover the total spectrum! In the dark, the eye is powerless to see; Homo Sapiens cannot observe infrared radiation. Bodies will emit waves at low ambient temperatures, the power density drops. The first night vision device appears. Nothing to do with the military. The device is used by builders.

Meet the thermal imager, which receives infrared radiation from objects. The device is not intended for viewing a dark landscape, but the frontal view can be seen. The gizmo has a number of settings, the following characteristics are typical:

• temperature 10 degrees Celsius heat appears orange glow;
• the walls of the houses look reddish;
• the surrounding inanimate nature of different shades, even black.

Forget about assembling a thermal imager with your own hands, you can buy it for 50 thousand. After spending seven thousand, you can buy a night vision device (NVD) in a store. There is no point in taking a thermal imager specifically for vigil in the dark; it helps builders evaluate the quality of thermal insulation measures. If you find a foreman you know, you can admire nature in the dark for free by borrowing a unit.

The circuit of the night vision device is implemented by the indicated processes, so as not to irritate the eye with a radiant rainbow; inside the factory product there is a transparent plate covered with semiconductor material, using the internal photoelectric effect, it allows you to “see” the infrared radiation of objects.

For reference. The photoelectric effect is the phenomenon of the transition of electrons in a material to new energy levels under the influence of photons of light. It is incorrect to use the term for invisible radiation, this is how the concept is played up in literature, so we avoid contradicting other (authoritative) sources.

Under the influence of invisible “photons”, the electrons of the plate receive energy. Information can be read by changes in the transparency of the material and the electrical conductivity of the substance. Microchannel technology for manufacturing sensitive elements helps to avoid illumination of neighboring pixels. The Nazis were the first to approach the solution of the problem. Germany benefited from the work of talented scientists. Some voluntarily, others were forced. A rifle scope weighing 2.25 kg with a suitcase of batteries (13.5) kg was created. It would probably have made it possible to accomplish many feats (or crimes) if Soviet troops had not taken Berlin in May 1945.

Sometimes the radiation is further amplified by photomultipliers. Helps to obtain a bright, contrasting image for a night vision device. Often external radiation is not enough; infrared illumination is used. Lamps are used, more often semiconductor diodes of a special type are used. You can find it in a radio amateur store. By the way, the coherence of LED radiation is high. This means that interference will not affect the quality of the picture.

For reference. Coherence is interpreted as being in phase with the wave. Such light is concentrated in a narrow segment of the spectrum ( vertical line graphics), easily folds, giving greater brightness than other radiation sources. As a result, you will get high-quality illumination with low power.

Night vision devices are divided as follows:

1. The nature of the impact on the environment:
   1. Active with LED backlight.
   2. Passive, receiving only radiation from other objects.
2. Method of processing the received signal:
   1. With amplification.
   2. Deprived of reinforcement.
3. Sign of the presence of a storage device:
   1. Registrants.
   2. Not registering.

Now you can assemble a night vision device with your own hands.

Make your own night vision device

The night vision device includes:

1. Converter of infrared radiation to video signal.
2. A kind of eyepiece that could display the signal in real time.
3. Backlight.

There are many devices in the store that help with night photography. The night vision device is obviously based on the same technology. A black and white micro camera will do. It’s not cheap, but it’s easy to adapt the gadget for other purposes if you get tired of the night vision device. Examples of devices are JK 007B, JK-926A. The main thing is that the device has a video output; any camera has a built-in port, otherwise why is it needed at all? The purchase price should not greatly exceed the store price of the night vision device (see above), otherwise greed will stifle it. Take comfort, our device will be able to record, the option costs extra money on the counter.

Find an old viewfinder. Visit a salon that repairs household appliances if you don’t have any suitable equipment at home. The viewfinder is equipped with one input for video according to the protocol used by the camera.

The question can be clarified by interviewing local professionals, and the operation can be checked by connecting the devices with a cable. It works - all that's left is to buy a backlight. Order LEDs online and shake up your nearest market. How to check? There is a video camera for recording at night. Go into the dark, turn on the power, see if the radio element glows: point the lens at the video camera.

A foreign do-it-yourself amateur recommends combining a dozen LEDs in garlands of 6 pieces per branch. Provide the bunch with a 10-ohm shunt and supply power to the battery. It is difficult to reverse the polarity; just in case, use a special reference book for LEDs. The backlight block is ready. The LEDs are mounted on a homemade housing: an ordinary children's pencil case, packaging.

Actually, it's ready. We connect the camera and viewfinder with a video cable, placing the lens in the same plane with the LEDs. Considering the size of the devices, they will fit in one pencil case. The viewfinder is mounted on the side. For the recording device, you will need to install the appropriate connector into the housing. Night vision devices from China cannot compare with ours! Let's look at the operation:

1. The night camera captures your surroundings.
2. LEDs illuminate objects for better visibility.
3. The viewfinder projects the image visible to the eye.
4. If necessary, registration is carried out through a special connector.

Don’t be surprised if you fail to see distant objects; the LED rays don’t reach you. The night vision device has disadvantages: there are no glasses, the cost of new components is high, you need to buy batteries and place them in the case. We explained in simple language the principle of operation of the device. Purpose: to show how to make a night vision device from improvised materials. However, there are probably a couple of reagents lying around in the chemistry lab. Try to slow down the teacher!

Shop night vision devices

The Cyclops night vision device is so named because it received a monocular instead of glasses. Would be useful for a one-eyed giant. Like others, a night vision device is characterized by three parameters:

1. Resolution in arc minutes. The smallest part of the field of view that can be distinguished from an adjacent one of similar size.
2. Gain.
3. Line of sight.

The faint reflection of the stars is enough for the devices to work; if the moon illuminates the sky, the picture will become clear. Celestial bodies will illuminate the landscape no worse than the LEDs discussed above. Of course, if you look at the sky, you can study the Ursa Major and Ursa Minor, but the picture will be filled with a whitish glow.

The Zenith monocular night vision device has a built-in backlight and a piezoelectric energy converter for power supply. The brand supplies hunters with scopes, do not confuse them. Especially for people with blurred vision, lens adjustments to the missing diopters are available. Makes night vision goggles for reading in the dark!

NPF Dipol produces night vision devices, the products are no different at an affordable price. However, you need to look at the intended purpose of the device. There is an opportunity to pay 190 thousand rubles for glasses, for this money Belarusians will sell a cool device for exploring the surrounding area at night. Catch the car thieves, watch the shameless people returning from the party, punish the desecrators of the area!

This article will focus on night vision devices. zero generation. What exactly are these devices? Zero-generation night vision devices are the simplest types of the family of these devices that have active illumination. These devices operate in the near-infrared range. It should be noted that remote controls for TVs and household appliances operate in the same range.

Let’s finish the introductory part here and start assembling the device, but before that we suggest watching the video

What we need:
- old web camera;
- 4 infrared LEDs;
- 4 resistors of 50 ohms;
- a piece of plastic;

At the very beginning, you should clarify the features of some materials. Infrared LEDs can be removed from old remote controls. The author does not recommend using more than four LEDs. And the plastic that we will use during assembly should be visible through infrared rays, but not visible through ordinary light. The best option would be exposed film. If you don't have one, you can simply connect the camera and look through different pieces of plastic. According to the author, soft black folders from Erich Krauser are excellent. Let's get started.

First of all, we disassemble our webcam and unscrew the lens from it.

Next, we look at where exactly the filter is located in the camera. Sometimes the filter we need is in the lens holder and is installed inside. That is, in order to remove it you need to unscrew two screws on the back side, remove the holder or simply break the filter and screw the holder back. The author has a filter installed in the lens.

To do this, he simply lifts the top locking ring and pulls out the light filter itself. This filter allows only the visible part of light to pass through and blocks infrared rays, which is not acceptable if we want to use infrared radiation specifically.

Now, instead of the old filter, we need to put our new one and put the web camera back together.

Each LED has two outputs. We need to combine their cons.

Now we need to connect a resistor to each plus.

We connect the free ends of the resistors to each other.