How to get a visible line from the point beam of the laser. How to make a laser from a DVD drive (drive) with your own hands a powerful laser with your own hands detailed instructions

The word "laser" or "Laser" is an abbreviation from "Light Amplification by Stimulated Emission of Radiation." In Russian: - "Strengthening of light through forced radiation", or an optical quantum generator. The first laser in which silver-covered ruby \u200b\u200bcylinder was used as a resonator, was developed in 1960 by Hughes Research Laboratories, California. Today the lasers are used for various purposes, ranging from measuring different values \u200b\u200bbefore reading coded data. There are several ways to make a laser, depending on your budget and skills.

Steps

Part 1

Understanding how the laser works

The laser operation requires a source of energy. Lasers operate by exchanging electrons of the active medium of the laser by an external source of energy and stimulate them to the radiation of the light of a certain wavelength. This process was first proposed in 1917 by Albert Einstein. In order for the electrons (in the atoms of the active laser medium) light, they must first absorb the energy by going to a higher orbit, and then give this energy as a particle of light when returning to the original orbit. This method of input of energy into the active medium of the laser is called "pumping". "

Channel passage of energy through an active (reinforcing) medium. A reinforcing medium or an active laser medium increases the power of the light due to the induced (forced) emission of electron separated. A reinforcing medium can be any structure or substance from those listed below:

Installing mirrors to hold light inside the laser. Mirrors, or resonators, hold light within the laser working chamber until the desired energy level is accumulated for radiation through a small hole in one of the mirrors or through the lens.

• The simplest resonator or "linear resonator" uses two mirrors located on the opposite sides of the laser chamber generating one output beam.
• A more complex "annular resonator" uses three or more mirrors. It can generate several rays or one beam with an optical insulator.

1. The use of focusing lens for the direction of light through the enhancement environment. Along with the mirrors, the lens helps to concentrate and send light so that the enhancement environment will receive as much light as possible.

Part 2

Laser construction

Method First: Creating a laser from the kit

Purchase. You can buy in the electronics store or buy via the Internet "Laser Kit", "Laser Set", "Laser Module" or "Laser Diode". The laser kit should include the following:

• Driver circuit. Sometimes sold separately from other components. Select the driver scheme that will allow you to adjust the current.
• Laser diode.
• Adjusting lens can be made of glass or plastic. As a rule, a diode and lens are collected together in a small tube. These components are sometimes sold separately without a driver.

1. Assembling driver diagram. Many laser sets are sold with an intolerable driver. These sets include pCB And the corresponding details, and you have to solder them, following the attached scheme. Some sets can have a driver assembled.

   Connect the control unit to the laser diode. If you have a digital multimeter, you can turn it on to the diode chain for current control. Most laser diodes have a current located in the range from 30 to 250 milliamper (MA). The current range from 100 to 150 mA will give a powerful ray.

   • You can give a more powerful current to a laser diode to get a more powerful beam, but the additional current will reduce the service life or will even burn the diode.

2. Connect the power supply or battery to the driver diagram. The laser diode should shine bright.

3. Rotating a lens focus a laser beam. Direct it on the wall and focus until a good, bright point appears.

   • After you adjusted the lens in this way, place the match on the ray line and rotate the lens until you see that the match head starts to smoke. You can also try to burst balloons Or burn holes in paper.

Method Second: Building a laser on a diode from an old DVD or Blu-Ray drive

1. Take old DVD Or Blu-ray writing player or drive. Choose devices with a recording speed 16x or faster. These devices have laser diodes with an output power of 150mW or more.

   • DVD drive has a red laser diode with a wavelength of 650 nm.
   • Blu-ray drive has a blue laser diode with a wavelength of 405nm.
   • DVD Drive must be enough in good condition to record discs, although not necessarily successfully. In other words, its diode must be good.
   • You should not attempt to use the reading DVD, reading and writing a CD instead of a DVD writing. The reading DVD has a red diode, but not so powerful as in the DVD writing. The laser diode in the CD card is quite powerful, but radiates light in the infrared range, and you will get a beam that is not visible to the eye

2. Removing a laser diode from the drive. Turn the drive low part up. You will see the screws that you have to unscrew before you can separate the drive mechanism and pull out the diode.

   • After you figure out the drive, you will see a pair of metal guides held in place with screws. They support the laser set. Unscrew the guides to remove them. Remove the laser set.
   • Laser diode in size is less than a penny. It has three metal contacts in the form of legs. It can be placed in a metal shell with a protective transparent window or without a window, and maybe not closed.
   • You have to stretch the diode from the laser head. It may be easier if you first remove the heat sink from the assembly before trying to extract the diode. If you have an antistatic bracelet, use it while removing the diode.
   • Contact the laser diode carefully, especially if it is unprotected diode. If you have an antistatic container, place the diode into it until you start collecting the laser.

3. Prepare a focusing lens. You will have to skip the beam from the diode through the focusing lens to use it as a laser. You can do this one of two ways:

   • The use of magnifying glass as a focusing lens. Rotate the lens so to find the desired place to get a focused laser beam. If necessary, this will have to do every time before using the laser.
   • Buy a low-power laser diode, such as 5 MW assembled with a lens and tube. Then replace it on the laser diode from the writing DVD.

Made with your own hands, come in handy in every home.

Of course, the homemade device will not be able to gain a greater power, which production devices have, but still some benefit from it can be obtained.

The most interesting thing is that it is possible to make a laser cutter with the help of old unnecessary items.

For example, with your own hands, make a laser device will allow the use of an old laser pointer.

In order for the process of creating a cutter to be promoted as quickly as possible, it is necessary to prepare the following items and tools:

• laser type pointer;

• flashlight on battery batteries;

• old CD / DVD-RW writing, you can have failed - you will need a drive with a laser;

• electrical and screwdriver kit.

The process for making a cutter with your own hands begins with the disassembly of the drive, where you need to get the device.

Extraction needs to be done at the maximum neat, while you have to show patience and be attentive. There is a lot in the device. different wires with a practically the same structure.

Choosing a DVD drive, you need to take into account that it is writing, since it is this option that allows you to record with a laser.

The record is performed during the evaporation of a thin metal layer from the disk.

In the process of reading, the laser is functioning half of its technical capabilities, slightly illuminating the disk.

In the process of dismantling the upper mounting element, the view will fall on the carriage with a laser that can move in several directions.

The carriage must be carefully removed, carefully remove the connectors and screws.

Then you can go to the removal of the red diode, due to it, there is a burning disk - it can be easily made with your own hands using an electrician. The extracted element should not shake, but even more so drop.

After the main part of the future cutter is on the surface, you need to make a thoroughly thought out plan for assembling a laser cutter.

At the same time, it is necessary to take into account the following points: how best to place a diode, how to connect it to the power source, because the diode of the writing device requires more electricity than for the main element of the pointer.

This question can be solved by several methods.

To do hand cutter With a more or less high power, it is necessary to get a diode located in the pointer, after which it is possible to change it to an element extracted from the DVD drive.

Therefore, the laser pointer also disassemble carefully, as well as the drive of a writing DVD device.

The subject is spinning, then separated its body into two halves. Immediately on the surface it will be possible to see the item, which you need to replace with your own hands.

For this, the native diode from the pointer is removed and neatly replaced with more powerful, its reliable fastening You can perform with glue.

It is possible to remove the old diode element immediately will not work immediately, so it can be hiding it gently with a knife tip, then slightly shake the pointer housing.

At the next stage of the manufacture of a laser cutter you need to make a housing for it.

For this purpose, a flashlight is useful with rechargeable batteriesThat will allow the laser cutter to get an electroatkuchka, acquire aesthetic appearance, and ease of use.

To do this, it is necessary to introduce a modified top of the former pointer to the lantern housing.

Then you need to connect to the diode charging, by means of a battery located in a flashlight. It is very important during the connection process to accurately establish polarity.

Before the flashlight is assembled, it is necessary to remove the glass and other extra elements of pointer, which can be a hindrance of the laser beam.

At the final stage, the laser cutter is prepared for use.

For comfortable handmade All stages of work on the device must be strictly observed.

To this end, you need to check the reliability of fixation of all embedded elements, the correctness of the polarity and the flatness of the installation of the laser.

So, if all of the above assembly conditions are accurately observed, the cutter is ready for use.

But since the homemade manual device is endowed with low power, it is unlikely that a full-fledged laser cutter on metal will be obtained.

What will ideally be able to perform a cutter, it is to make holes in paper or plastic film.

But a laser fixture, made by your own hands, cannot be done, here it will be enough to harm the health of the body.

How can I enhance the homemade laser?

To make your own hands a more powerful laser cutter for metal work, you need to use devices from the following list:

• DVD-RW drive, no difference working or not;

• 100 PF and MF - capacitors;

• 2-5 ohm resistor;

• 3 pcs. rechargeable batteries;

• soldering iron, wires;

• steel lamp on LED elements.

Assembling a laser cutter for handmade occurs according to the following scheme.

With the use of these devices, the driver is assembled, subsequently, it will be able to provide a laser cutter with a certain power by the board.

In this case, no power cannot be connected to the dude directly, since the diode burns. It is also necessary to take into account that the diode must take a feedback not from the voltage, but from the current.

As a collimator, a hull is used, equipped with an optical lens, at the expense of which rays will accumulate.

This detail is easy to find in a special store, the main thing is that it contains a groove to install a laser diode. Price this device A small one is approximately $ 3-7.

By the way, the laser is assembled in the same way as the elevated cutter model.

A wire can also be used as an antistatic product, it is wrapped with a diode. After that, you can proceed to the layout of the drive device.

Before moving to full manual assembly Laser cutter, you need to check the driver's performance.

The current power is measured using a multi-meter, for this take the remaining diode and carry out measurements with their own hands.

Taking into account the current speed, it is picking its power for a laser cutter. For example, in some variants of laser devices, the current will be 300-350 mA.

Others, more intense models, it is 500 mA, subject to the use of another drive device.

To homemade laser It looked more aesthetically, and they could be conveniently used, it is necessary for him a housing, a steel flashlight functioning on LEDs can be used.

As a rule, the mentioned device is endowed with compact sizes that will allow him to fit in his pocket. But in order to avoid pollution of the lenses, you need to purchase or sew a case in advance or sew your own hands.

Features of production laser cutters

Not everyone by pocket the price of a laser cutter for metal production type.

Such equipment is used for processing and cutting metal materials.

The principle of the laser cutter is built on the development of a powerful radiation tool, endowed with the evaporation property or blow the metal molten layer.

Such a production technology when working with different types Metal is capable of providing high quality Cut.

The depth of processing materials depends on the type of laser installation and characteristics of the materials being processed.

To date, three types of lasers are used: solid-state, fiber and gas.

The device of solid emitters is based on the use of specific varieties of glass or crystals as a working environment.

Here in an example, inexpensive installations operated on semiconductor lasers can be brought.

Fiber - their active medium operates due to the use of optical fibers.

This type of device is a modification of solid-state emitters, but according to experts, the fiber laser successfully displaces its analogues from the metalworking area.

At the same time, optical fibers are the basis of not only the cutter, but also the engraving machine.

Gas - working medium of the laser device combines carbon dioxide, nitric and helium gases.

Since the efficiency of the radiators under consideration is not higher than 20%, they are used for cutting and welding of polymer, rubber and glass materials, as well as metal with a high degree of thermal conductivity.

Here, in an example, you can take a metal cutter manufactured by Hans, the use of a laser device allows you to cut copper, brass and aluminum, in this case the minimum power of the machines only wins from its analogues.

Diagram of driving operation

Only a desktop laser can be operated from the drive, this type of device is a portal console machine.

According to the guide rails of the device, the laser block can move both vertically and horizontally.

As an alternative to the portal device, a tablet model of the mechanism was made, its cutter moves only horizontally.

Other existing variants of laser machines have a desktop equipped with a drive mechanism and the property has navigated in different planes.

On the this moment There are two driving mechanism control options.

The first ensures the movement of the workpiece due to the operation of the table drive, or moving the cutter is performed due to the functioning of the laser.

The second option provides for simultaneous movement of the table and cutter.

At the same time, the first model of control compared with the second option is considered much easier. But the second model is still characterized by high performance.

General technical characteristic Cases considered is the need to introduce into the CNC block device, but then the price for assembling the instrument for handmade will be higher.

Is the most progressive, but also expensive at the cost of technology. But with its help, such results can be achieved, which are not for the power of other methods of metal processing. Abilities of laser beams give any material fit form Truly endless.

The unique capabilities of the laser are based on the characteristics:

• Clear focus - due to the ideal orientation of the laser beam, the energy focuses at the point of exposure to the minimum loss,
• Monochromatism - the laser beam has a wavelength of fixed, and frequencies is constant. This allows you to focus with its usual lenses,
• Coherence - in laser rays a high level of coherence, therefore their resonant oscillations enhance energy by several orders of magnitude,
• Power - The above properties of laser rays provide focusing of energy highest density At the minimum area of \u200b\u200bthe material. This allows you to destroy or burn any material on a microscopically small area.

Device and principles of work

Any laser device consists of the following nodes:

• source of energy;
• working body producing energy;
• the focus, fiber optic laser, mirror systems that enhance the radiation of the working body.

The laser beam is pointing to the heating and melting material, and after a long exposure - its evaporation. As a result, the seam comes out with an uneven edge, evaporating material is deposited on optics, which reduces its life.

To obtain smooth thin seams and removal of vapors use techniques of blowing inert gases or compressed air Melt products from laser exposure zone.

Factory models of lasers equipped with high-class materials can provide a good exploration indicator. But for household use They have too high price.

Models made at home can crash into metal to a depth of 1-3 cm. This is enough to make, for example, details for decorating the gate or fences.

Depending on the cutter technology used, there are 3 species:

• Solid-state. Compact and easy to use. Active element - semiconductor crystal. Models with low power quite affordable price.
• Fiber. Fiberglass is used as an element of radiation and pumping. The advantages of fiber laser cutters are high efficiency (up to 40%), long term operation and compactness. Since there is little heat during operation, there is no need to install the cooling system. You can make modular structures that allow you to combine the power of several heads. Radiation is broadcast on flexible fiber. The performance of such models is higher than solid-state, but their cost is more expensive.
• . These are inexpensive, but powerful emitters based on use chemical properties Gas (nitrogen, carbon dioxide, helium). With their help, you can cook and cut glass, rubber, polymers and metals with very high levels thermal conductivity.

Homemade household laser

For execution repair work and the manufacture of metal products in everyday life is often required laser cut Metal do it yourself. Therefore, homemade craftsmen have mastered the manufacture and successfully use manual laser devices.

According to the cost of manufacture for household needs, a solid-state laser is suitable.

Power homemade deviceOf course, it is impossible to even compare with production devices, but it is quite suitable for use for domestic purposes.

How to assemble a laser, using inexpensive parts and unnecessary items.

For the manufacture of the simplest instrument, you will need:

• laser pointer;
• flashlight on battery batteries;
• cD / DVD-RW (old and faulty suitable);
• soldering iron, screwdriver.

How to make a manual laser engraver

Laser cutter manufacturing process

1. From a computer drive, you need to remove a red diode that burns disk when recording. Please note that the drive must be writing.

After dismantling the upper fasteners, remove the carriage with the laser. For this, gently remove connectors and screws.

To remove the diode, it is necessary to reconstruct the fastenings of the diode and remove it. It is necessary to do it extremely neat. The diode is very sensitive and it is easy to damage, dropping or sharply shaking.

1. The diode contained in it is removed from the laser pointer, and the red diode from the drive is inserted instead. The clarity of the pointer is disassembled into two halves. Old diode shake, steaming the knife edge. Instead, a red diode is placed and fastened with glue.
2. As a hull of a laser cutter is easier and more convenient to use a flashlight. The top fragment of pointers with a new diode is inserted into it. The glass lantern, which is for the directional laser beam of the barrier, and the pieces of the pointer must be removed.

At the stage of connecting the diode to power from rechargeable batteries It is important to observe the polarity.

1. At the last stage, it is checked how reliably all the elements of the laser are fixed, the wires are properly connected, the polarity is observed and the laser is fixed.

Laser cutter Ready. because of low power It is impossible to use it in working with metal. But if the device, cutting paper, plastic, polyethylene and others are required similar materialsthen this cutter is quite suitable.

How to strengthen the power of a metal cutting laser

You can make a more powerful laser for cutting metal with your own hands, equipping it with a driver collected from several parts. By means of the board, the cutter provides the desired power.

The following parts and devices will be needed:

1. cD / DVD-RW (work old or defective), with a recording speed greater than 16x;
2. 3.6 volt batteries - 3 pcs.;
3. capacitors per 100 PF and 100 MF;
4. resistance 2-5 ohms;
5. collimator (instead of laser pointed);
6. steel LED flashlight;
7. soldering iron and wires.

To the dode, the current source cannot be connected directly, otherwise it burns. The diode takes feeding from the current, and not from the voltage.

Focusing rays in a thin ray is performed using a collimator. It is used instead of laser pointer.

Sold in the store of electrical goods. There is a nest in this detail where the laser diode is mounted.

Laser cutter assembly is the same as the model described above.

To remove static with a diode, wound around it. For the same purpose, antistatic bracelets can be used.

To verify the driver operation, the current force supplied to the diode is measured by a multimeter. To do this, the device is connected non-working (or second) diode. For the work of the majority homemade devices The current is sufficient 300-350 mA.

If you need a more powerful laser, the indicator can be increased, but not more than 500 mA.

As a hull for homemade it is better to use lED flashlight. It is compact and convenient to use it. In order not to dirty lenses, the device is stored in a special case.

Important! The laser cutter is a kind of weapon, so it is impossible to direct it on people, animals and in hand to children. It is not recommended to wear it in your pocket.

It should be noted that the laser cutting is impossible with their own hands, but with household tasks, it will quite cope.

Sometimes of unnecessary things stored at home, you can make something really incredible and useful. Did the old DVD-RW (writing) drive died at home? We will tell you how to make a powerful laser at home, borrowing elements from it.

Safety technique

The device that we eventually get is not a harmless toy! Before making a laser, take care of your safety: the entrance of the beam in the eyes is detrimental for the retina, especially if the invention is powerful. Therefore, we advise you to produce all the work in special protective glasses that will save your vision, if something goes wrong, and you will accidentally send a laser beam to yourself or a friend in the eyes.

Using the laser in the future, remember the simple safety technique:

• Do not send a laser beam on flammable or explosive items.
• Do not shine in reflective surfaces (glasses, mirrors).
• Even fastened from a distance of up to 100 m Laser beam is a danger to the retina of the human eye and animals.

Working with a laser module

The main thing that we need is a writer drive. Notice, the higher the recording speed, the more powerful there will be our DVD laser. It goes without saying that after extracting a laser module, the technique will become internal, so disassemble only such a device that you will no longer need.

And now we start:

The first part of our work is behind. Go to the next important stage.

Build device scheme

The scheme is needed in order to control the power of our device. Otherwise, it will simply burn in the first application. Drawing for the laser you will see more.

For our device, mounted installation is quite suitable. And now we turn to providing the power to the laser made with your own hands.

Power supply device

We will minimally we need 3.7 V. Provide it can old batteries from mobile phones, finger batteries. It is only necessary to connect them in parallel with each other. A stabilization power supply unit is suitable for checking the operation of the device or stationary laser pointer.

At this stage, you can already test the operation of the device. Send it on the wall, floor and turn on the power. You must see a bright reddish bunch. The dark looks like a powerful infrared flashlight.

You see that while the glow is far from laser: the beam is too wide; He asks for it to focus. This we will do on.

Lens for focusing laser beam

To adjust the focal length, you can do the borrowed from the same DVD-RW drive of the lens.

Now connect the device to the power, sending its light on any surface through this lens. Happened? Then we go to the final stage of work - the premises of all the elements in the hard case.

Manufacture of housing

Many, advising how to make a laser, they say that the module is the easiest way to put in the body from a small flashlight or Chinese laser-pointer. Where, by the way, already there is a lens. But let's look at the situation, if neither one nor the other you have turned out to be at hand.

As an option - put elements in aluminum profile. It is easily cut with hacksaw, is modeled by pliers. You can also add a small finger battery. How to do it, you are playing the photo below.

Be sure to force all contacts. The next step is the fastening in the lens housing. Fasten it easier to plasticine - so you can adjust the most successful position. In some cases, the best effect is achieved if you turn the lens to the laser diode by the convex side.

Turn on the laser and adjust the clarity of the beam. As soon as you achieve satisfactory results, fix the lens in the housing. Closely close it, for example, clogged tightly tape.

How to make a laser: an alternative way

We will offer you another, somewhat excellent way to manufacture a self-made powerful laser. You need the following:

• DVD-RW drive with recording speed 16x or more.
• Three finger batteries.
• Capacitors 100 MF and 100 PF.
• Resistor from 2 to 5 ohms.
• Wires.
• Soldering iron.
• Laser pointer (or any other collimator is so called a module with a lens).
• LED steel lamp.

Now let's see how to make a laser on this method:

1. Already described in the method, remove the laser module from the drive, located in the device carriage. Do not forget to protect it from static tension, wrapped out the exits of a thin wire or putting an antistatic bracelet.
2. According to the above scheme, make a spike driver - fees, which will withdraw our homemade on right power. Much attention is paid to the observance of polarity so as not to spoil the laser diode sensitive to this.
3. At this stage, we will check the performance of the driver just collected. If the laser module is from the model at a speed of 16x, then there is enough current for it in 300-350 mA. If higher (up to 22x), then stop at 500 mA.
4. After you were convinced of the suitability of the driver, it must be placed in the case. This can be both the basis of the Chinese laser pointer with an already mounted lens and more suitable housing from the LED flashlight.

Laser testing

But that, for what you were interested in how to make a laser. Go to the practical testing of the device. In no case do not spend his houses - only on the street, away from fire and explosive objects, buildings, dry, a bunch of garbage, etc. For experiments, we will need paper, plastic, the same tape, plywood.

So, start:

• Position on asphalt, stone, brick paper sheet. Mouse over it is already a well-focused laser beam. You will see that after a while, the sheet will begin to smoke, and then lights up at all.
• Now we turn to the plastic - from the impact of the laser beam, it will also begin to smoke. We do not advise you to spend such experiments for a long time: the combustion products of this material are very toxic.
• Most interesting experience - With plywood, flat planted. A focused laser on it can be smelted a certain inscription, drawing.

A homemade laser is definitely fine work and a capricious invention. Therefore, it is possible that your handicraft will soon be out of order, so for her it is important certain conditions Storage and operation that can not be provided at home. The most powerful lasers, with ease of cutting metal, can be obtained only in specialized laboratories, they naturally not available for lovers. However, the usual device is very dangerous - directed with big Distance In the eyes of a person or an animal, close to the flammable item.

Hello ladies and gentlemen. Today I open a series of articles dedicated to powerful lasers, for Habrapoisk says that people are looking for similar articles. I want to tell how to make a pretty powerful laser at home, and also to teach you to use this power not just for the sake of "shifting on the clouds".

A warning!

The article describes the manufacture of a powerful laser ( 300mW ~ Power 500 Chinese Pointers), which can harm your health and health surrounding! Be extremely careful! Use special safety glasses and do not send a laser beam on people and animals!

We learn.

On the Habré, just a couple of times slipped articles about portable lasers Dragon Lasers, such as Hulk. In this article, I will tell you how you can make a laser that is not inferior to most models selling in this store.

Preparing.

First you need to prepare all components:
- non-working (or working) DVD-RW drive with recording speed 16x or higher;
- condensers 100 PF and 100 MF;
- resistor 2-5 ohms;
- Three AAA batteries;
- soldering iron and wires;
- collimator (or chinese pointer);
- Steel LED flashlight.

it required minimum For the manufacture of a simple driver model. The driver is, in fact, the fee that will display our laser diode at the desired power. Connect the direct power source to the laser diode is not worth it. The laser diode is needed to feed the current, not the voltage.

The collimator is, in fact, a module with a lens that reduces all radiation into a narrow beam. Ready collimators can be bought in radio logs. In such already immediately available comfortable spot To install a laser diode, and the cost is 200-500 rubles.

You can also use a collimator from a Chinese pointer, however, the laser diode will be difficult to fix, and the collimator body itself is probably made from metallized plastic. So, our diode will be badly cooled. But this is possible. This option can be viewed at the end of the article.

We do.

You must first get the laser diode itself. This is a very fragile and small detail of our DVD-RW drive - be careful. A powerful red laser diode is in the carriage of our drive. It is possible to distinguish it from a weak one by a larger radiator than an ordinary IR diode.

It is recommended to use an antistatic bracelet, as the laser diode is very sensitive to static voltage. If there is no bracelet, then you can wrap the dedication of the diode with a thin wire until it is to wait for the installation into the case.

According to this scheme, you need to discharge the driver.

Do not confuse polarity! The laser diode will also fail instantly with incorrect polarity of the supply power.

The scheme indicates a condenser 200 MF, however, for portability, 50-100 mf is quite enough.

We try.

Before installing a laser diode and collect everything into the case, check the driver's performance. Connect another laser diode (non-working or second, which is from the drive) and measure the current strength by a multimeter. Depending on the speed characteristics, the current strength must be chosen correctly. For 16 models, 300-350mA is quite suitable. For the fastest 22x, you can apply even 500mA, but a completely different driver, the manufacture of which I plan to describe in another article.

It looks terrible, but it works!

Aesthetics.

You can boast about the weight with the laser only before the same crazy techno-maniacs, but it is better to collect in a comfortable body for beauty and amenities. It is already better to choose how to like it. I mounted the entire scheme in the usual LED flashlight. Its dimensions do not exceed 10x4cm. However, I do not advise you to wear it with you: if there are never any complaints with the relevant authorities. And it is better to store in a special case, so that a sensitive lens was not dug.

This is an option S. minimal cost - Used collimator from Chinese pointed:

The use of a factory-made module will allow you to obtain these results:

The laser beam is visible in the evening:

And, of course, in the dark:

Maybe.

Yes, I want to tell and show how you can use similar lasers. How to make much more powerful copies that can cut the metal and wood, and not just to wait for the match and melted plastic. How to produce holograms and scan items to obtain 3D Studio Max models. How to make powerful green or blue lasers. The scope of the application of lasers is quite wide, and one article here is not to do.

Need to remember.

Forget about security technician! Lasers are not a toy! Take care of your eyes!