How to make a homemade fan. USB fan from a computer cooler. Correctly create an eternal fan

Hot. If I may say so, even too much. That is why you can think about how to make a fan. You will say that it can be purchased at the store. But, firstly, their cost increases significantly. Secondly, they are quickly dismantled and it is not always possible to find the necessary ones on store shelves. Therefore, several practical advice about how to assemble the fan. After all, it is quite possible to arrange even at home from available materials. Here are a couple of options.

How to make a fan based on an old cooler. If you have an old one, you can take it from there. Borrow a switch there as well. Also, in order to make a homemade fan, you will need some kind of battery holder. There are many of them, you can take it from some broken toy or something else in the same vein. Of course, you will need the batteries themselves in the amount of several pieces. It remains to connect all these components together, and a simple fan will be ready. If you don’t want to bother with the holder, you can use a regular USB port to supply power. You can make a stand out of anything. It all depends specifically on your own imagination and what you have at hand.

You can, for example, make a stand out of an ordinary hard wire attached to something. It is not so important what materials will be used, but how stable the whole structure will be.

Another option, how to make a fan, may be useful for enthusiasts. An excellent tool for manufacturing will be computer disks. What else will be required? A motor from a simple toy, a cork left over from champagne, some kind of handy switch and a few batteries. We take the disk, and then we make as many cuts as we need the blades. It is necessary to leave about a centimeter to the inner edge. Then turn each of the blades slightly at an angle. It bends much better if the disk is heated, for example, over gas. Then you will need to insert a champagne cork into its center. If you make a small puncture in its center, for example, with an awl, you can easily attach the entire structure to some kind of pin. You will need to make a leg - absolutely any object in the form of a cylinder, which is able to accommodate batteries and wires, can act in its role.

You will also need to arrange the base for the entire unit - it can also be any, the main thing is that it is stable and can hold the structure on itself. It only remains to add a few additional tips- when cutting the blades, you need to make sure that each of them is approximately 45 degrees - in the end, about 8 pieces will come out. The cork inserted into the center of the disk will need to be fixed with glue. In any case, the process should not cause you any difficulties.

If you have been thinking about how to make a fan, now you probably understand that it is very simple. Each of the proposed models is extremely easy to manufacture, and you will not need much time to create it. You don't need anything special, the above is enough. These fans are very handy and compact. You can put it on your desktop. Or, if there is such a desire, take it with you to the garage or to the dacha, where these devices will be cooling means. It is difficult to argue with the fact that they have tangible dignity - after all, these are collected, according to by and large, very useful things from rubbish.

As you can see, it is quite possible to make a fan on your own, from improvised materials, without bothering to go to the store and search for the unit that suits you. reasonable price. Everything is much easier.

The question is trivial. First, we recommend determining the installation location of a homemade fan. Two types of engines dominate in technology: collector (historically the first), asynchronous (invented by Nikola Tesla). The first ones are very noisy, switching sections causes a spark, the brushes rub, causing noise. An asynchronous motor with a squirrel-cage rotor is quieter, generates less interference. You can find the starter relay in the refrigerator. By adding a couple of phrases of humorous phrases, we will return the seriousness of the site. How to make a fan with your own hands, not to scare your family. Let's try to answer.

Aspects of designing a homemade fan

The device of the fan is so simple, it makes no sense to tell, paint the insides. What to consider when designing? Remember the growl cyclone vacuum cleaner, the volume is above 70 dB. Inside the commutator motor. More often deprived of the possibility of regulation of revolutions. Decide whether a similar sound pressure level is acceptable at the installation site of a home-made fan? Having chosen the second, we will concentrate on induction motors, simple models do not require a starting winding. The power is low, the secondary EMF is induced by the stator field.

Induction motor drum with squirrel-cage rotor cut with copper wires along the generatrix, the rod is at an angle to the axis. The direction of the slope determines the direction of rotation of the motor rotor. Copper conductors are not isolated from the material of the drum, the conductivity of the Olympic metal exceeds the surrounding material (silumin), the potential difference between adjacent conductors is small. Current flows through copper. There is no contact between the stator and rotor, there is nowhere for the spark to come from (the wire is covered with varnish insulation).

The noise of an induction motor is determined by two factors:

Alignment of the stator and rotor.
Bearing quality.

By correctly setting up, maintaining an asynchronous motor, you can achieve almost complete noiselessness. We recommend that you consider whether the sound pressure level is important. The case concerns a duct fan - it is allowed to use a collector motor, the requirements will be set by the location of the section.

The duct fan is placed inside the duct section, mounted, breaking the path. For maintenance, the section is removed.

Noise is losing its dominance. The sound wave is attenuated as it passes through the duct. Particularly fast is the part of the spectrum that has inconsistent dimensions relative to the width/length of the tract section. Read more textbooks on acoustic lines. The commutator motor can be used in the basement, garage, devoid of people. The neighbors of the cooperative will hear, rather be too lazy to pay attention.

What is good about a collector engine, what are we fighting for the right to use. Three disadvantages of asynchronous:

At the initial moment asynchronous motor does not develop a large torque, a number of special design measures are taken. The fan doesn't matter. Most household models are equipped with asynchronous motors. In production, the number of phases is increased to three.

Search fan motor

One YouTube video suggested using the engine direct current 3 volts from a hardware store. Tops the USB cord, works by rotating the blade of the laser disc. Useful invention? If you are tired of an extra port, the heat will help you survive. It's easier to take a processor cooler, power it from the system unit. A yellow wire goes to 12 volts (red to 5). The black pair is the earth. Collect from an old computer. Citizens of the Russian Federation are simply too lazy to invent, we throw curious equipment into a landfill.

Asynchronous fan motors operate without a starting capacitor ... The peculiarity of fan motors is: they go straight with the winding. A couple of tips to help get the engine:

Make a fan impeller

The question of what to make a fan from has not been resolved, the authors keep silent about the impeller. First things first, the fridge! The compressor is blown by an impeller. You will get the motor, remove it. Come in handy. Concerning washing machine, put the drum on the aircraft propeller. A plastic tank is suitable to make a case. Heat the bending points with a building hair dryer.

Inspect the blender, supply an unnecessary laser disc, which has received the shape of an impeller. You can make a fan yourself using improvised materials. It does not require much power, there is no point in being too zealous, honing the details. We believe readers know how to make a fan with their own hands.

Eternal fan from the CPU cooler

We decided to please readers by telling how to make a fan. The review is far from the first, I had to dig around, looking for something worthwhile. It looks chic the idea of creating an eternal fan that spins forever. A mail.ru user posted a design that looks attractive. Let's take a closer look, thinking along the way how to make a fan that runs forever.

You know, of course, system units work quietly ( modern models). The slightest noise means: the cooler's axis has gone astray, or it's time to lubricate the aged fan. They work for hours, days add up to weeks, the system unit will last for years. Made possible by smart technology. Think about it, the noise depends on the magnitude of the friction force. Mechanical energy becomes thermal, acoustic due to the presence of roughness. CPU coolers rotate easily, it's worth blowing.

The author of the video - we apologize for the lack of a name, we justify it: the video is in English - it offers to assemble an eternal fan from an accessory. The accuracy of fitting parts is great, the blade turns easily. Costs are reduced to a minimum. The author of the video posted by the deirones channel noticed: the processor fan is powered by direct current. He climbed inside, found four coils, equally spaced around the circumference, with their axes directed towards the center of the device.

There are no commutators inside, which means a paradoxical fact: the field of the coils is constant.

If the asynchronous motor of a typical fan is powered by 220 volts alternating voltage, which creates a rotating magnetic field, in our case the picture is constant. One could say: inside the rotor sets in motion a commutator that creates the desired distribution. Not true, is confirmed by the further course of thought of the author, the result of experience. A Western innovator decides to replace the coil with a permanent magnet. Indeed, there is no alternating field - why electric current?

Defiantly, the author cuts off the power wire, places neodymium (hard disk) magnets around the perimeter of the frame. Each on the continuation of the axis of the coil. The work is finished, the blades cheerfully began to rotate. We believe that a principle that is hushed up in orthodox literature is simply used. Trade secret of the patent holder.

The initial movement of the blade is obtained by random fluctuations in the air. It resembles a magnetron, the buildup of oscillations is caused by the natural chaotic movement of elementary particles. The question arose as to what determines the direction of rotation. The design is absolutely symmetrical. We decided to figure it out, we express our observations:

Agree, it is more convenient than to stir up USB ports, constantly wasting batteries. The perpetual fan works from an arbitrary position, it is devoid of wires. We believe that the strength of the magnets plays a decisive role. The simple rule stops working: more is better. slips golden mean. When the blades spin from a random flow of air, overcoming a field of neodymium pieces. Weak magnets are surely powerless to keep a steady rotation. The field strength must be exactly as produced by the coils when subjected to a voltage of +5 or +12 volts.

Correctly create an eternal fan

We discussed how to make a fan, we will measure the direction, the strength of the magnetic field of the coils. Use special devices. Magnetometer, teslameter, formed by magnetic induction converter, measuring module. When the fields interact, the resulting picture is obtained, which is called cohesion. The converter generates an EMF. The size determines the measured strength of the magnetic field. Like two fingers! It costs 10,000 rubles.

The magnets will be located at a considerable distance from the axis. The coils are much closer. You need to know how the picture changes with distance. According to Coulomb's law, the force falls in inverse proportion to the square of the distance, which is true for single charges of an arbitrary sign. Separate magnetic poles in nature have not yet been found (it is not possible to create), the cube of distance is introduced into the law. Let's say the distance to the coil from the axis is 1 cm, the diagonal perimeter is 10. This means that neodymium should be 10 x 10 x 10 = 1000 times stronger than a small coil.

No one obliges to place neodymium magnets on the diagonals of the fan perimeter. The poles lie crosswise. Regulate the strength of the impact over a wide range. By placing neodymium magnets in the center of the sides of the fan frame, we significantly increase the field strength. Let's do the calculation. Let's say the hypotenuse of a triangle with a side of 10 cm is a diagonal. The distance to the center of the square will be 10 / √2 = 7 cm. You see, the ratio with 1000 drops, reaching 7 x 7 x 7 = 343. strong magnets neodymium to create an eternal fan.

Let's measure strength! A compass is suitable (there are custom designs assembled by one's own hands, for example, http://polyus.clan.su/index/indikatory_magnitnogo_polja_svoimi_rukami/0-52). One coil should be connected to the power supply. Then find the position, the raised arrow will deviate by about 45 degrees (if you don’t like it, take any other azimuth). Then start experimenting with neodymium. Position the piece different deletions, achieving the coincidence of the deflection of the arrow with the one obtained when using the processor fan coil. Surely the distance is not equal to the diagonal, half of the side, neodymium will have to be broken, cut.

Sawing one edge along the length, we carefully break the parts on the nail, getting the desired field strength to create an eternal fan. We assume that the induction is distributed in proportion to the volume. Today they told intelligibly how to make a fan with your own hands!

Source of power

Those who want to make a fan with their own hands see 3 problems: get the engine, power, make a propeller. The parts must fit together. Three problems are solved, you start making a fan with your own hands. Today at home, an abundance of switching power supplies. Think it started in the 90s. Gaming consoles, mobile phones, other equipment. The equipment breaks down, switching power supplies remain. The voltage is sometimes non-standard, most motors work on any voltage. The RPM will just fluctuate with the voltage. The broken house was lying around Appliances- immediately make a fan yourself.

Homemade fan power supplies

People are constantly trying to make a special fan with their own hands. One issue is more often left out of the discussion: the power supply. The device of the fan itself is so obvious that it makes no sense to dwell on it in more detail. So, it’s clear that there are an unthinkable amount of batteries today. Can they work for a long time? The answer is no. As a last resort, take the "crown", in Soviet times they were considered a reliable source of energy. The power supply is bad, the power will gradually decrease, the speed will decrease, and the person will be annoyed. Stability without additional effort is important. A small 12 volt battery is missing - get ready: let's start looking for how to make a homemade fan power source.

The first thing that comes to mind is to screw up the computer. It is known that miniature devices are powered by a USB port. Gadgets are recharged. The USB port is a source of inexhaustible energy. The voltage is low, you need a low voltage DC motor. We believe you can find at home, buy in a hardware store. How much will the power of the port: according to the old standards 2-3 watts. Another thing is to find the host device with updated version interface (2014 recognized as a rarity). The developers promised to give out 50 watts (even more, it's hard to believe). True, there will be more wires, nominal voltages will increase. We remind, according to tradition, power is supplied to the red (+), black (-) wires. White, green - signal.

It is clear that it is difficult to expect high power - even if the port supports it, the motor will not pull. It is recommended to look at the voltage more. The motor must be supplied with a higher voltage. For example, it is recommended to use a CPU cooler. The supply voltage is less than the prescribed 12 volts, the rotation speed will simply decrease. Beware of exceeding - the motor may burn out.

We are looking for energy, the issue is easier to solve than for 3 volts:

12 volt power supply for a do-it-yourself fan

We suggest not to assemble a switching power supply, to make a regular one with your own hands. Recall that the first ones are distinguished by small transformers. Therefore, the power supply will be relatively large in size. It will consist of the following parts:

A step-down transformer. We will not name the number of turns in advance, the voltage is unknown, having straightened it with diodes, we get 12 volts. Of course, you can experiment, like a YouTube video about homemade radios, capturing the reader, let's look for a ready-made solution.
The full-wave bridge, adding three to one diode, we increase the efficiency. Radio components are not very expensive.
The backbone of the power supply is ready for a home-made fan to serve for a long time, we will straighten the network ripple. After the bridge, turn on the low-pass filter, redraw the circuit from the Internet.

The output is a constant voltage with an amplitude of 12 volts. Try not to mix up the terminals. Where the "plus" is, where the "minus" comes out can be understood by examining the diagram. Below is a drawing of the bridge, see, read the explanations. In radio electronics, the direction of the current is indicated opposite to the true one. Charges flow, according to beliefs, in the direction from plus to minus (towards electrons). Reading the circuit, you will see: for a diode, a transistor, the emitter marked with an arrow looks wrong. In the direction of positive charges. Each has marks, on the diagram it is indicated by a huge triangle arrow. Therefore, we always learn, "plus", guided by graphic designations shown in the drawing.

The figure shows: the plus will be on the right, it is transmitted according to the arrow of the diode to the lower output terminal. The minus will go up. With an alternating voltage (roughly speaking), plus, minus will alternate from left to right, the name of the rectifier will become clear - full-wave. Works on the positive part of the voltage and the negative. Diodes take power, low-frequency. Solid size, power dissipation is relatively large. You can calculate using a simple formula taken from a physics course. We multiply the resistance of an open p-n junction (leafing through the reference book) by the current consumed by the motor, taking the margin at least 2 times. The body of the motor contains an inscription indicating the power, can be divided by a voltage of 12 volts, simply multiply by 2 - 3, take a diode with equivalent dissipation power (see reference book).

Now let's calculate the transformer ... We went here http://radiolodka.ru/programmy/radiolyubitelskie/kalkulyatory-radiolyubitelya/, we chose the Trans50 program, we will master it. Note that among the software there is one that allows you to calculate the filter parameters. Do you regret that you were going to make a fan with your own hands? They offer to choose one of 5 windings. Steel is everywhere. You can do without, the losses will be great. Steel forms a magnetic circuit, energy goes to the secondary winding. It is better to find an old rusty transformer. The time is bad, in the hungry 90s, landfills are littered with plates of windings handed over for scrap. There were no problems with winding transformers.

It's time to understand how much voltage is required for the correct operation of the circuit. A term borrowed from electronics, the effective voltage will help alternating current. Voltage, on the active resistance, creating a thermal effect equal to the constant voltage of the effective amplitude. To obtain the required voltage value on the secondary winding, you need to divide 12 volts by 0.707 (one divided by the square root of 2). The authors received 17 volts. Engineering calculation sins with an error of 30%, let's take a small margin (part of the amplitude up to 1 volt will be lost on the diodes).

As for the secondary winding current (required for calculation), type something like “cooler power” in the search engine. Let's do it with the readers. Clever articles write: the current consumption of the cooler is indicated on the case. There will be a necessary parameter, we will substitute in the calculator. The voltage of the secondary winding, the author took 19 volts. The voltage drop across the p-n junctions of powerful silicon diodes is 0.5 - 0.7 volts. Therefore, an appropriate reserve is needed. Smart heads searched, concluded that the processor cooler does not consume more than 5 W, therefore, the current is 5 divided by 12 \u003d 0.417 A. We substitute the numbers for the downloaded calculator, for the tape core we get the design parameters of the transformer:

Cross-sections of the magnetic circuit for winding 25 x 32 mm.
The window in the magnetic core is 25 x 40 mm.
The magnetic circuit is finished with a frame for winding wire 1 mm thick and with a cross section of 27 x 34 mm.
The wire is wound along larger side windows, 1 mm from the edges remains a margin, a total of 38 mm.

The primary winding is formed by 1032 turns with a diameter of 0.43 mm. The approximate length of the wire is 142 meters, the total resistance is 17.15 ohms. The secondary winding consists of 105 turns of a copper conductor with varnish insulation with a diameter of 0.6 mm (length 16.5 meters, resistance 1 ohm). Now readers understand: the question of what to make a fan is starting to be solved with a core ...

How effective are the proposed technical solutions? Fans are known to Ancient Egypt. The clip of Michael Jackson, recommending "remember the time" (Remember the time) testifies. The plot was hardly prepared without the advice of archaeologists and historians. We want to report that in Mexico, most ladies use fans. The Spaniards know how to deal with the heat, the country lies on the equator. Think...

The fan is not a complex device. It consists of a motor, blades, various adjustment buttons and a stand-case. There are additional elements, such as backlight, clock, but these are already options that are not so important.

It is not at all necessary to buy a fan, because it is quite possible to make it yourself. Moreover, this does not require special skills of the master.

With due skill, homemade model it will turn out not to be a way to get rid of old things, but an opportunity to show imagination and, possibly, hidden talents. Some craftsmen quite simply get both functional and extremely attractive options. They harmoniously complement the interior and become the center of attention no worse than any art object.

How to make a fan from a conventional electric motor

Probably the easiest and fast way to get a self-assembled home-made fan is to find an ordinary motor, which is most often found in toys.

Standard electric motor from a toy

Ordering such a thing is not difficult. Moreover, today, without stopping for a minute, caravans of various knick-knacks from the Celestial Empire ply. And if not, then just buy an inexpensive one. toy car and remove the motor from it.

But expect the impossible from such a device is definitely not worth it. Rather, it can only slightly drive air. But for a desktop model it will do. He will be able to blow the face of the person sitting at the computer.

For such a fan, you can use absolutely anything. The main parts will be:

blades;
motor;
on/off button;
stand;
supply system.

Otherwise, the limit of the idea will be only within the boundaries of fantasy.

After the motor is ready for use, it makes sense to take care of the power. These can be batteries, as in the toy for which the motor was intended. But, of course, such energy will not last long. However, there is a plus - the device will remain compact and mobile.

The second option is mains power. But in this case, don't overdo it. Direct connection through the plug is a sure way to burn out the motor. So do not experiment, trying to spin the engine up to high speeds. On toys, electric motors are usually designed for 3-4.5 Volts, and the desire to give more rotation due to powerful energy sources, firstly, will quickly land the source (if it is a battery), and secondly, it will seriously reduce the life of the fan up to breakage. The motor will start to heat up, the brushes may melt.

But modern chargers convert the voltage in the network, reducing it to the specified parameters. You can find a power supply, including on sale, which is ideal for the motor.

To create the blades, you can already take any material. The main thing is that it should be light. Due to the weakness of the motor, the less the blades weigh, the faster the rotations will be, and, therefore, the efficiency of the work.

The easiest option is to take a cork from an ordinary plastic bottle, which will serve as a fastener for the blades. Make a hole in the bottle according to the size of the rotating axis of the electric motor.
Blades can be made from a regular CD. A hole is burned in the center according to the size of the cork from the bottle. The circumference of the disk is divided into 8 sectors. They are cut for some distance, but not to the center. After that, the disk must be heated with fire in order to easily bend the blades. For this, a lighter is suitable.

Creating Blades on CD

You can attach the disc to the cork with glue. The second option - when a hole is burned in the middle for the cork - immediately connect the structure. The melted plastic will harden and hold firmly.
After all this, the structure is interconnected. Wire is suitable for the stand. This is perhaps the easiest option. And for such a light device, you can’t imagine better. You can bend the skeleton in such a way as to discreetly hide the batteries there. Or carefully run the power supply wire going to the motor.
The circuit should not always be closed if batteries are used, so a button must be fixed on the case. She is inexpensive. You can use it from the toy from which the motor was removed.

Another version of the propeller device is the use of paper, only thick. The method is even simpler, but less practical.

Advice! When experimenting, remember that the larger the fan blade area, the more noisy it will be. On the other hand, small blades do not move air as efficiently.

How to make a paper fan

Paper is not the best suitable material for a home fan for the simple reason that it is very impractical. Any ingress of water, even banal humidity - and the device will rapidly begin to lose its rigidity.

But even despite all the disadvantages, craftsmen even make quite nice samples from paper. Certainly, we are talking about thick paper or cardboard. Strong material from boxes is good. A regular motor or cooler, an on / off button and wires are also useful.

The simplest table fan using cardboard

An approximate design plan is that the device can be simplified as much as possible. The impeller is easy to cut and can have many or few blades. All at the request of the master. The motor can be mounted on a wooden or cardboard bar. The stand will also go from paper or an old computer disk.

It is only important not to forget that such a fan turns out to be very light, which makes it shaky in operation. Therefore, it is necessary to further strengthen the body. Old batteries, bolts or nuts are good.

How to make a plastic bottle fan

Crazy Hands' favorite raw material - plastic bottles - are almost perfect for creating your own fan. For the propeller, the upper part of the standard round bottle. It is necessary to cut off the part with the cork just above the glued label.

The part of the bottle with the cork will be the blades. To do this, the plastic before the cork needs to be cut so that several different petals are obtained. After one, the petals are cut off at the base. The rest are the future propeller blades.

Plastic bottle fan blades

To shape the blades and twist them a little, you can use a candle or a lighter. The main thing is not to overdo it, because the plastic is soft and can catch fire. The task is to warm it up a little, and not set it on fire.
The cork will be the base of the propeller. A hole is made in it according to the dimensions of the axis of the motor. To keep the connection firmly, you can put it on glue.
Now is the time to think about the foundation. The rest of the plastic bottle is also suitable for it. A hole is cut in it to firmly place the cork with the blades at a right angle. It is necessary not to forget to weight the base - with nuts, bolts or any other metal objects.
A hole is made on the base for the button and the chain is assembled. There is also enough space for the power supply.

Field for imagination when working with plastic bottle extensively. You can use several bottles at once. One will become a propeller (more precisely, part of it), and the second will become a good base. But then you will need Additional materials. For example, regular drinking straws.

Simple and lightweight bottle fan

How to make a usb fan

But the most convenient and simplest fan is exactly the old cooler, which can also be used. For example, put it on the table, and it will cool, only not the processor or video card, but the person.

The advantages of this design are obvious: the cooler is very reliable, because it is his job to constantly turn the impeller and cool something. Yes, and getting coolers is easy. It is enough to either find an old computer, or order a new fan or buy it in a store.

The cooler device is simple. This is a ready-made fan in a plastic case. Two wires (usually red and black) depart from it.

Regular computer cooler

Making a USB fan is a matter of minutes:

The wires on the cooler are stripped by 1-2 centimeters.
A regular USB cable is taken, at the end of which you also need to get rid of the insulation. The standard USB cord has four wires inside. Of these, you should choose black and red. Cut off the rest so as not to interfere, and clean up the necessary ones.
Connect the red wire of the cord to the red one on the cooler. Black - with black. Carefully insulate areas without winding. Ready.
It remains only to think about the holding device. Here the already familiar wire, which takes any shape, can come in handy. Even a cardboard box will do for the fan case, and if you spend a little more time and effort, you can even build a real design object.

Design approach to the design of the fan

It is very convenient when the fan turns on when you start the computer. Besides, modern blocks have multiple USB outputs. It turns out that such a device will not interfere.

Another point - sometimes you want to turn on the fan regardless of the computer's operation (especially since a device with a cooler turns out to be quite powerful, good and useful). Then you can use adapters. For example, phones today make chargers that easily turn into a USB cord when the plug is disconnected. Similar equipment can also be used for a fan, making it universal: powered from the network and from the USB port of any computer. Another plus of this design is the simplest electrical circuit. A cooler-based fan can even do without extra buttons: just a wire and a plug.

DIY bladeless fan

But a slightly uncommon use of a free cooler (but you can get by with an electric motor) is a bladeless fan. Modern, interesting, with due skill - no less effective - a solution that definitely attracts the eye. The thing turns out to be completely non-standard, spectacular.

For example, here is the ideal appearance of a bladeless or ducted fan model:

This is how you can make a bladeless fan with your own hands

The most important thing about bladeless models is, of course, their appearance. Therefore, if you make such a device yourself, then you need to try to think through the frame in great detail. Rough edges, roughness - all this will spoil the impression.

The case of a bladeless fan is almost entirely a working area. Do not think that some space technologies are implemented here.

Air circulation is carried out quite prosaically - with the help of rotating blades. They hide in a tuba base. If you take a cooler from a computer, then you can make a stand according to its shape. Here, as they say, at the discretion of the author.

The differences from the classics are in the location of the cooler - it is placed horizontally in a bladeless fan.

Location of the cooler in a bladeless fan

The upper ring is made hollow inside, two-layer. There, the main redirection of air in the right direction is carried out.

A hollow cavity is visible in the upper ring of the fan, from where air blows

You can make the frame of a bladeless fan out of plastic, wood, thick cardboard. It is better to use a flexible material so that it can be easily shaped into a ring. Alternatively, use a combined structure. For example, rings are made of cardboard or plastic, and the frame is rigid - made of wood.

You need to cut out:

four faces for the stand;
Two circles of the same radius;
Twist two rings of different diameters.

Then everything is connected together, if necessary - painted.

Meals can be organized in different ways. A universal option - a combined cable for a USB connector and a plug-in plug for an outlet.

The device can also be slightly complicated. For example, make a light strip from a diode tape along the edge of the rim. The backlight consumes little energy, but it will add beauty to the fan. And the power supply and wiring, if necessary, can be easily hidden in the stand.

How to make a powerful fan with your own hands

When it comes to powerful fans, you need to understand that they require completely different motors. Starting from the motors of old fans, ending with others household appliances. Well suited:

unnecessary ceiling chandeliers with a fan;
old lawn mowers;
drills;
hoods.

The only thing you need to get into the voltage corridor, which is required to power the motor. For example, drills most often need 18 volts. But for ventilation purposes, it will be sufficient to supply less than half of this voltage. Even at 12 volts, the fans are very loud and extremely unstable due to the strong inertia of the rotating blades.

Power for powerful electric motors must be done from the network. Therefore, you need to think about installing a power supply or connecting a charger. The wiring diagram can be complicated by adding light bulbs lying around, Digital Watch, radio, toggle switch or board for switching operating modes. But it's easier, of course, to limit yourself to only a fan with a button, if that's enough.

In any case, such homemade variations of homemade fans are sometimes much better than even purchased options. With proper skill, a very good thing can turn out, the real pride of the owner.

Working in the summer at the computer, or just on vacation, sometimes you want a slight breeze, a “local” coolness. The airflow of an office air conditioner doesn't provide the sweet comfort of a gentle, directed blow that a mini fan provides. It is very easy to make such a device with your own hands.

How to make a "personal breeze"

The most famous invention in this field since ancient times is folding fans. They were made from colored paper and ostrich feathers, from painted silk and carved bamboo sticks. Such a device has only one drawback: to obtain such a desired coolness, you need to hold it in your hand, which is not always convenient. It is ridiculous to imagine a manager or an economist working at a computer and fanning himself with a fan.

Therefore, let's return to our topic and figure out how to provide yourself with a pleasant breath in the heat. To make a mini-fan with your own hands, you need to solve the following few tasks:

What will be the rotating propeller, from what material.
Where can I get a motor.
From what power source will the device work.
Is it possible to completely do without an engine.

How to make a mini fan?

Let's start with the simplest: making blades. If you take a square from an ordinary sheet of paper, cut it diagonally, leaving about a centimeter intact in the center, you get a blank for a turntable. Then 4 sharp corners are bent to the middle and alternately strung on a nail, having previously stuck it into the center of the workpiece. That's all! Too bad it's just a baby spinner.

For functional and useful design take 2 CDs or DVDs. From one you get the blades, from the second - a stand for the device.

The circle that has served its purpose is cut into several equal parts(from edge to center). To make the process easier, you can hold the plastic for a few seconds over the fire. Each of the resulting sectors of the softened workpiece is slightly rotated around its axis to form a propeller.

What other components are needed in order to assemble a convenient mini fan? Here is the list:

Cork from a wine bottle.
Cardboard or plastic straw for attaching the engine to the stand.
Small motor.
Two wires.
USB cable or batteries.
Good glue, scissors, a strong large nail or awl.

Where to get a micromotor

It happens that in the home bins are stored appliances that no one has been using for a long time. It can be hair dryers or mixers, blenders and children's cars. Even a motor from an old tape recorder, player or some other mechanism may come in handy. We disassemble the unnecessary device and remove the engine, after disconnecting all the wires.

Since we make a mini fan, the motor is from the old washing machine, refrigerator, vacuum cleaner or other large unit will not work due to its size and noise.

Continuation of the assembly of the device

A hole is made in the cork and placed on the axis of the selected engine. To fix the shaft, it is pre-coated with glue. Then, a propeller cut from the disk is fixed with glue on the part of the axis sticking out of the plug hole.

Next, glue the paper tube along the diameter with glue and put it on the plane of the second disk. Then the motor is installed on top and its contacts are connected to the leads from the USB cable. If, when plugged into the computer port, the propeller spins in reverse side, you need to disconnect the contacts, swap them and solder them again.

By connecting a battery to such a device, you can use it anywhere in the room, in the car, near the pool.

Wind turbine without engine

How to make a mini fan at home and do without a motor? A very popular option is to create a device using small neodymium magnets.

They take the cooler from the computer and separate 4 transformer coils from its case. Instead of copper windings, you need to install and fix the same number of pieces of a magnet. Usually buy neodymium in the form of semi-arcs or remove them from a worthless hard drive. The magnets are placed exactly in the places where the transformer windings were removed, that is, along the perimeter of the cooler frame.

As soon as the last piece is fixed, the mini-fan will begin its rotation. Using technology with permanent magnets, it is possible to assemble an almost perpetual motion machine. To stop it, one of the pieces of neodymium that replaced the coil is removed from the circuit.

The field of the magnets must be equal in strength to the field of the disconnected coils, otherwise the propeller will not be able to rotate in a constant stable mode. The poles are arranged diagonally, alternating plus and minus.

What to do if none of the above methods are suitable, if there is not enough time or details to homemade fan? In this case, you will have to use the usual factory product.

If there is no air conditioner or even a domestic fan at home, and the summer heat does not allow you to live normally, you can turn on your ingenuity and use old computer parts. Any craftsman can assemble a fan from a cooler, fortunately, building materials are always at hand, and in every home or office you can fish out something useful from computer trash.

Materials for useful crafts

To make this simple DIY device, you will need the following materials and tools:

soldering iron and related accessories (solder, rosin);
a piece of USB cable of any length;
knife, wire cutters, electrical tape;
the computer cooler itself (one or more).

The fan will be connected via USB to the computer. This makes it possible to dispense with the use of a fan without third-party power supplies.

There are coolers different sizes. Their design includes wires with which you can adjust the number of revolutions depending on the temperature of the CPU. In our case, these wires are not needed - we will only work with the black (minus) and red (plus) wires, which receive voltage from the computer motherboard. The remaining strands can be cut off with wire cutters so that they do not interfere with assembly. We need to do this carefully so as not to damage the red and black wires we need.

Operating procedure:

Take any unnecessary USB cable you need to connect the cooler to it. Perhaps it will be formally non-working, but here we need to find wires of the same colors as the cooler. The remaining wires are removed with wire cutters for ease of use.
Remove the outer insulation from the USB cable with a sharp clerical knife: measure a distance of about 3-4 cm from the end of the wire and attach the knife to the wire.
Then, in a circular motion, without pressing, circle the wire in a circle.
Now pull on the insulation - it should easily move away and expose the bundle of wires.

If you apply too much pressure, cutting through the insulation can damage the insulation of the wires under the outer layer of plastic that you cut. Then you have to bite off the entire braid and repeat the procedure due to the fact that a small violation of the integrity of the insulation usually leads to a short circuit. Now that you have prepared the wires with your own hands, you can proceed to the next step.

Soldering and insulating wires

Take the wires of the cooler and the USB cable, loosen about 10 mm of insulation and twist them so that the red wire connects to red and the black wire to black. Next, you will need a soldering iron to tin the twisted ends and thereby give strength to the connection. To do this, you need to do this:

heat the soldering iron and prepare a piece of rosin or flux;
attach twisted wires to rosin or soak in flux;
melt a piece of solder or tin on the tip of the soldering iron;
run the tip over the twisted wires if they are flux-treated, or attach them to a piece of rosin and apply a little pressure with a hot tip.

This process is called tinning wires or do-it-yourself processing of contact points with red-hot tin. Rosin is needed so that the tin can better bond to the surface of the bare USB wire.

Now you need to isolate the conductors so that a short circuit does not occur when connected to the computer's USB connector. So, unwind a piece of electrical tape about 3-5 cm long and skip between soldered wires. Wind one wire so that the tin-plated contact is securely insulated and no pieces of bare conductor are visible through the layers of electrical tape. Next, you need to cut off another piece of electrical tape and do the same with the second wire.

Stand

It's time to think about the fan stand you just made. You will need a piece of copper or aluminum wire. Take a piece of wire and bend it in the shape of the letter "P". Thread the ends through the bottom two bolt holes on the cooler. Bend the wire and thread the ends through the top holes. Now you can adjust the fan tilt level.

If there are many fans

You can make a whole battery of fans with your own hands. To assemble a fan from four or more coolers, you need to know how to properly connect them to a power source (computer USB connector), as well as how to connect these fans to each other.

Connecting cables

From the school physics course, we know that there are two types of connections - serial and parallel. With the first type of connection, you need to take the red (positive) wire from the USB cable and connect it to the red wire of the first cooler, and connect the black wire of the first cooler to the red wire of the second cooler, and so on. The last one, black, is connected to a residential USB cable of the same color.

Parallel connection is much simpler: all the red wires are assembled in one twist, just like the black ones. The red wires connect to the red wire of the USB cable, and the black wires, respectively, to the black one. For greater reliability of contact, it is necessary to make tinning and wrap the contact points with electrical tape, as described above.

Registration

Now you need to think about the design of the fan unit that you made with your own hands. In order to collect all the coolers together, you need to decide what shape the design will be in the form of. You may find it easier to fold them in a square or just line them up.

In any case, for these purposes you will need glue gun, which is usually used for the manufacture of do-it-yourself products in circles of technical creativity or floristry. You can use it to glue the ribs of the coolers in the right places and let it cool. But if you don't have a gun and only have wire and electrical tape, then you can fasten the coolers through the bolt holes with wire, and wrap the edges with black electrical tape.

So, you managed to make sure that making a simple blowing of the room with your own hands is simple and accessible even to a person who is far from technical creativity. Such simple solutions are able to help out in a situation where you need to provide coolness in the room in calm weather, and the usual fan has either broken down or is simply not in the house. In these cases, simple ingenuity comes to the rescue.