When working at a computer in the summer, or just on vacation, sometimes you want a gentle breeze, “local” coolness. The air flow of an office air conditioner doesn't create the sweet comfort of a gentle, directional blast 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 area since ancient times is folding fans. They were made from painted paper and ostrich feathers, painted silk and carved bamboo sticks. This device has only one drawback: to obtain the much-desired coolness, you need to hold it in your hand, which is not always convenient. It’s funny to imagine a manager or economist working at a computer and fanning himself.
Therefore, let’s return to our topic and figure out how to provide yourself with a pleasant breeze in the heat. To make a mini-fan with your own hands, you need to solve the following several problems:
- What kind of rotating propeller will it be, and what material will it be made of?
- Where can I get a motor?
- What power source will the device operate from?
- Is it possible to do without an engine completely?
How to make a mini fan?
Let's start with the simplest thing: 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 will get a blank for a pinwheel. Then 4 acute angles bend towards the middle and alternately string them onto a nail, having previously stuck it into the center of the workpiece. That's all! It's a pity that this is just a children's fidget spinner.
For functional and useful design take 2 CDs or DVDs. One will make the blades, the second will make a stand for the device.
The used circle is cut into several equal parts (from edge to center). To make the process easier, you can hold the plastic over the fire for a few seconds. Each of the resulting sectors of the softened workpiece is slightly rotated around its axis to form a propeller.
What other components are needed to assemble a convenient mini fan? Here is the list:
- Cork from a wine bottle.
- A cardboard or plastic tube for attaching the engine to the stand.
- Small motor.
- Two wires.
- Cable with USB contact or batteries.
- Good glue, scissors, a strong large nail or awl.
Where to get a micromotor
It happens that household bins contain appliances that no one has used for a long time. These could 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, having first disconnected all the wires.
Since we are making a mini fan, the motor is from an old one washing machine, refrigerator, vacuum cleaner or other large unit will not be suitable due to its size and noise.
Continued assembly of the device
A hole is made in the plug and placed on the axis of the selected engine. To secure the shaft, it is first coated with glue. Then the propeller cut from the disk is glued to the part of the axle sticking out of the hole in the plug.
Next, smear a paper tube along the diameter with glue and place it on the plane of the second disk. Then install the motor on top and connect its contacts to the terminals 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 blower without engine
How to make a mini-fan at home without a motor? A very popular option is to create a device using small neodymium magnets.
Take the cooler from the computer and separate 4 transformer coils from its body. Instead of copper windings, you need to install and secure the same number of pieces of magnet. Usually they buy neodyms in the form of half-arcs or extract them from unusable 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 secured, the mini fan will begin to rotate. Using permanent magnet technology, it is possible to assemble an almost perpetual motion machine. To stop it, one of the neodymium pieces 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 manner. The poles are placed diagonally, alternating plus and minus.
What to do if none of the above methods are suitable, if there is not enough time or details for homemade fan? In this case, you will have to use a regular factory product.
The fan is not a complicated device. It consists of a motor, blades, various adjustment buttons and a stand-case. There are additional elements, such as backlighting and a clock, but these are options that are not that important.
It is not at all necessary to buy a fan, because you can easily make one yourself. Moreover, this does not require special skills of a master.
With the proper skill, homemade model It will turn out not as a way to get rid of old things, but as an opportunity to show imagination and, possibly, hidden talents. Some craftsmen quite easily create 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 regular electric motor
Probably the simplest and quick way To acquire a homemade fan assembled with your own hands, you need to find a regular 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 trinkets from the Middle Kingdom ply. And if not, then it’s enough to buy an inexpensive one toy car and remove the motor from it.
But you definitely shouldn’t expect the impossible from such a device. Rather, it will only be able to move air slightly. But for a desktop model it will do just fine. He will be able to blow air onto the face of someone 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 only be within the boundaries of imagination.
After the motor is ready for use, it makes sense to take care of the power supply. These could be batteries, just like in the toy for which the motor was intended. But definitely 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 you need not to overdo it. Direct connection via a plug is a sure way to burn out the motor. So you shouldn’t experiment, trying to spin the engine to high speeds. On toys, electric motors are usually designed for 3-4.5 Volts, and the desire to provide more rotation due to powerful energy sources, firstly, will quickly drain the source (if it is a battery), and secondly, will seriously reduce the life of the fan, even to the point of failure. The engine will start to heat up and 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, that is ideal for the motor.
To create blades, you can take any material. The main thing is that it is light. Due to the weakness of the motor, the less the blades weigh, the faster the rotation will be, and, therefore, the efficiency of the work.
- The easiest option is to take a cork from a regular one. plastic bottle, which will serve as a fastening for the blades. Make a hole in the bottle the size of the rotating axis of the electric motor.
- The blades can be made from a regular CD. A hole the size of a bottle cap is burned in the center. The circumference of the disk is divided into 8 sectors. They are cut to some distance, but not to the center. Afterwards, the disk needs to be heated with fire to easily bend the blades. A lighter is suitable for this.
Creating blades on a CD
- You can attach the disk to the cork with glue. The second option - when a hole is burned in the middle for the plug - immediately connect the structure. The melted plastic will harden and hold firmly.
- After all this, the structure is connected to each other. Wire is suitable for the stand. This is perhaps the simplest option. And for such a lightweight device, you can’t imagine anything better. You can bend the frame in such a way as to hide the batteries there unnoticed. Or carefully run the power supply wire going to the motor.
- The circuit does not have to be always closed if you use batteries, so you need to secure the button to the case. It's inexpensive. You can use it from a toy from which the motor was removed.
Another option for a propeller design is to use thick paper. The method is even simpler, but less practical.
Advice! When experimenting, remember that the larger the fan blade area, the noisier it will work. On the other hand, small blades do not move air as efficiently.
How to make a fan out of paper
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 hardness.
But even despite all the disadvantages, craftsmen even make quite nice samples from paper. Of course we are talking about thick paper or cardboard. Strong material from boxes works well. You will also need a regular motor or cooler, an on/off button and wires.
The simplest table fan using cardboard
The 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. Everything is at the master's request. The motor can be mounted on a wooden or cardboard block. The stand will also be made from paper or an old computer disk.
It is only important not to forget that such a fan is very light, which makes it shaky in operation. Therefore, it is necessary to further strengthen the body. Old batteries, bolts or nuts work well.
How to make a fan from a plastic bottle
Crazy Hands' favorite raw material is plastic bottles, which are almost ideal for creating your own fan. The top of a standard round bottle works well for the propeller. You need to cut off the part with the cork just above the pasted label.
- The part of the bottle with the cork will be the blades. To do this, you need to cut the plastic down to the cork so that you get several different petals. After one, the petals are cut off at the base. The remaining ones are future propeller blades.
Fan blades made from a plastic bottle
- You can use a candle or lighter to shape the blades and twist them a little. The main thing is not to overdo it, because the plastic is soft and can catch fire. The goal is to warm it up a little, not set it on fire.
- The plug will be the base of the propeller. A hole is made in it according to the dimensions of the motor axis. To keep the connection firmly, you can put it on glue.
- Now is the time to think about the foundation. The rest of a plastic bottle will also work for this. A hole is cut in it to rigidly place the plug with the blades at a right angle. You must remember to weigh down 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 a power supply.
The field for imagination when working with a plastic bottle is vast. You can use several bottles at once. One will become a propeller (more precisely, part of it), and the second will become a solid foundation. But then they will need Additional materials. For example, ordinary drinking straws.
Simple and lightweight bottle fan
How to make a USB fan
But the most convenient and simple fan is an old cooler, which can also be used. For example, put it on a table, and it will cool, but not the processor or video card, but a person.
The advantages of this design are obvious: the cooler is very reliable, because it is its job to constantly turn the impeller and cool something. And it’s easy to get coolers. It is enough to either find an old computer, or order a new fan or buy it in a store.
The cooler design is simple. This is a ready-made fan in a plastic case. There are two wires coming from it (usually red and black).
Regular computer cooler
Making a USB fan takes just a few minutes:
- The wires on the cooler are stripped 1-2 centimeters.
- Take a regular USB cable, at the end of which you also need to get rid of the insulation. The standard USB cable has four wires inside. Of these, you should choose black and red. Cut off the rest so as not to get in the way, 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.
- All that remains is to think about the holding device. Here the already familiar wire, which can take any shape, can come in handy. Even suitable for a fan housing cardboard box, and if you spend a little more effort and time, you can even build a real designer object.
Design approach to fan design
It is very convenient when the fan turns on when the computer starts. In addition, modern units have several USB outputs. It turns out that such a device will not interfere.
Another point is that 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, today they make chargers for phones that easily turn into a USB cable when the connector with the plug is disconnected. Similar equipment can be used for a fan, making it universal: operating from the network and from the USB port of any computer. Another advantage 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 unusual use of a free cooler (but you can get by with an electric motor) is a bladeless fan. Modern, interesting, with the right 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 bladeless or duct fan model:
This is roughly 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, you need to try to think through the frame in the smallest detail. Uneven edges, roughness - all this will spoil the impression.
Frame bladeless fan is almost entirely a work area. Don’t think that some kind of space technology is being implemented here.
Air circulation is carried out quite prosaically - with the help of rotating blades. They hide in the base tube. If you take a cooler from a computer, 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.
Cooler location in a bladeless fan
The top ring is made hollow inside, two-layered. 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 the air blows
You can make the frame of a bladeless fan from plastic, wood, or thick cardboard. It is better to use a flexible material so that you can easily give it the shape of a ring. An alternative is to use a combined structure. For example, the rings are made of cardboard or plastic, and the rigid frame is made of wood.
You need to cut:
- four sides for a stand;
- Two circles of the same radius;
- Twist two rings of different diameters.
Then everything is put together and, if necessary, painted.
Meals can be arranged in different ways. Universal option– a combined wire for the USB connector and a plug for the socket.
The device can also be a little more complicated. For example, make a light strip of diode strip along the edge of the rim. The backlight consumes little energy, but will add beauty to the fan. And the power supply and wiring, if necessary, can easily be 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 old fan motors to others household appliances. Good fit:
- unnecessary ceiling chandeliers with fan;
- old lawn mowers;
- drills;
- hoods
The only thing is that you need to get into the voltage corridor that is required to power the motor. For example, drills most often require 18 volts. But for ventilation purposes, it will be enough 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 supplied from the mains. Therefore, you need to think about installing a power supply or connecting a charger. The electrical circuit can be complicated by adding stray light bulbs, an electronic clock, a radio, a toggle switch or a 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 the right skill, you can get a very good thing, a real pride of the owner.
Throughout the long winter, we look forward to pleasant summer days, and with the onset of hot weather, for some reason we begin to dream of coolness. How delightfully a light breeze created by a small homemade fan will help restore strength and relieve fatigue. Plus, making it is incredibly fun, right?
We invite you to familiarize yourself with step-by-step instructions for assembling simple, effective devices from literally waste raw materials. The article presented to your attention describes in detail how to make a fan with your own hands and what a home craftsman will need for this.
At your disposal detailed description manufacturing options whose effects have been tested in practice. You can make such devices yourself without having any experience at all. For a complete understanding of the information, attached step by step photos and video instructions.
The simplest fan can be made from CD discs. It can be used, for example, for local impact on a user who spends a long time at the computer.
Let's prepare the raw materials to complete the work:
- CD discs – 2 pcs.;
- low-power motor;
- wine bottle cork;
- cable with USB plug;
- a tube or rectangle made of thick cardboard;
- soldering iron;
- candle or lighter, hot glue;
- pencil, ruler, squared paper.
For our purposes, you can use a motor from old toy, for example, from a typewriter. A toilet paper roll slightly decorated with decorative finishing paper can be used as a cardboard tube.
The main advantage of this model is that almost any do-it-yourselfer will have all the materials needed for its manufacture.
The assembly process of the mini fan is quite simple.
Let's take one of the CDs and use a marker to divide its surface into eight identical sections. The easiest way to do this is to use a sheet of checkered paper.
Draw a cross on it from a horizontal and vertical line. We divide each of the four resulting right angles in half. Using cells, this is not difficult to do.
Using a very simple method using a checkered piece of paper, we can achieve the perfect layout of the disk into eight equal sectors
We place a disk on our drawing so that the intersecting lines are in the very center of its hole. Alternately applying a ruler to the lines diverging from the center, we make markings on the disk. This way the sections will be the same.
To divide the disk into blades, follow the marking lines with a soldering iron from the transparent part to the edge.
You can also use scissors for cutting, but there is a danger that the workpiece will crack during the process. If you don’t have a soldering iron, you need to use a knife preheated on the stove. When working with a soldering iron, deposited plastic is formed along the edges of the cut, which can be easily removed with a knife.
Cutting a disk with a soldering iron is the most effective method, in which the workpiece will not crack or deform, and the remnants of the deposited plastic can be easily removed with a knife
We heat the surface of the disk over the flame of a burning candle so that the blades can be slightly turned. If you don't have a candle, a lighter or a soldering iron will do.
The central part of the disk should be heated, and all blades should be turned in the same direction. Place in the disc hole wine cork. To fix it better, you need to pre-treat the edges of the hole with hot glue.
The USB cable must be connected to the motor. If we don’t guess the direction of rotation of the propeller, we can swap the reins, that is, change the polarity.
The motor needs to be glued to a cardboard tube, and the tube itself to a second CD, which will act as the base of the stand.
When the plug is installed in the hole, the stand from the second CD and cardboard tube, as well as the connecting device are already assembled, it is very important to correctly fit the propeller onto the motor shaft
Now the propeller needs to be “planted” on the rod of the future fan. We will try to make sure that it is installed strictly in the center. You can secure it in this position using hot glue.
After all work is completed, the fan is ready for use.
Although the construction of this device will not take you much time, the result of the work performed will undoubtedly please you
How to make something similar, but a little more complex design Having included a regulator in the circuit, look at the video posted at the end of this article.
Do you find these homemade instructions complicated? Then you may be interested in information about and rules for choosing them in order to purchase a ready-made device offered by household appliance manufacturers.
Fan based on a plastic bottle
What our craftsmen don’t do from plastic bottles! The time has come to say that they also make a very good fan. It may not ventilate your entire room, but it will definitely help those who have to work at a computer.
We offer two options for creating such a fan model.
Option #1 – hard plastic model
To complete the work we will need:
- plastic bottle with a capacity of 1.5 liters;
- a motor from an old toy;
- small switch;
- Duracell battery;
- marker;
- scissors;
- candle;
- hammer and nail;
- Styrofoam;
- hot glue gun.
So, we take an ordinary 1.5 liter plastic bottle with a stopper. At the level of the label line, cut off its upper part. This is exactly what we need to make the propeller. We divide the surface of the plastic blank into six parts.
We try to mark it out so that we get equal sectors: the quality of operation of the future device depends on this.
We cut the workpiece along the markings almost to the neck. We bend the blades of the future propeller and cut off every second of them. We are left with a blank with three blades equidistant from each other. The edges of each blade must be rounded. We do this carefully.
To remove those parts of the blades that are closer to the neck of the workpiece, it is better to use a utility knife; do not forget to round the edges of the blades
Now we will need a small candle. Let's light it up. We heat each blade at the base on it to turn it in the direction we need. All blades must be turned in the same direction. Remove the lid from the workpiece and punch a hole in the very center using a nail and hammer.
We place the plug on the rod of a small motor. Such motors can remain from old children's toys. As a rule, getting them is not difficult. Secure the cork with glue.
Now you need to make a base on which the motor will rest. For this purpose, we take, for example, a piece of polystyrene foam. We attach a rectangle to it, which can also be cut out of foam packaging.
Our motor, to which the propeller is attached, will be fixed on the upper surface of this rectangle. To do this, you need to make a recess in the foam that corresponds to the parameters of the motor.
Hot melt adhesive is used to secure the elements of the product. If it is unavailable, other adhesives can be used. It is important that the fastening itself is as reliable as possible.
You are sitting at the computer, it’s summer outside, there is no air conditioning. My hand is already tired of endlessly fanning myself with newspaper, and sweat from my forehead is dripping onto the keyboard. Common situation? If you don't have extra money, it will help homemade fan. To make it, you don't need to run to the store for parts. Everything you need for a leaf blower is in the house. Don't know how to make a free fan at home? Follow the text!
What does an air cooler consist of:
- engine
- fan blades
- stand
- power supply
The last point can be omitted if you do USB fan with your own hands. The computer has a voltage of 5 volts. You will need a printer cable, an old mouse, or any unnecessary device with a USB cable.
If you are a fan of DIY projects, you probably have some useful junk in your house. Otherwise, you have no need to know how to make a fan yourself.
Can't find an electric motor in a box of unwanted parts? You can make a fan from a motor from an old disk drive or a broken toy. Let's look at a few examples of how to make a mini fan from scrap materials.
Glue, cardboard, toy motor
To make a small propeller you will need a piece of corrugated cardboard 30x30 cm.
We glue the support in 2-3 layers, the area is at least two palms. We make the rack for the engine in the form of a prism 10–15 cm high. For cutting, we use a stationery knife. We bend the structure along a ruler.
How to make a mini fan durable and stable? Let's use a glue gun. No other glue will allow the connection to be made as reliably.
We connect with hot glue, and as thickly as possible: the structure should turn out to be monolithic. The blades can be made from thinner cardboard. The packaging for a mobile phone accessory is suitable.
This is the most critical element: the blades must be absolutely identical in shape and weight. Otherwise, your propeller will vibrate during operation and will quickly fall apart.
We glue the blades (carefully) onto a cardboard sleeve, observing aerodynamics. The planes should be rotated 30–45 degrees in opposite directions. To simplify the design, we assemble a USB fan with two blades with our own hands. They are easier to balance, and such a propeller can cope with cooling no worse than a three-bladed one.
Test run and balancing
We make a hole in the very center of the bushing (using an awl), place it on the motor axis, and carry out a test run. Of course, before assembly it is necessary to coordinate the angle of attack of the blades with the direction of rotation of the motor. Otherwise, the fan will blow in the opposite direction. If there is vibration, the propeller can be easily balanced by simply lifting the blades. After making sure that the propeller rotates smoothly and blows where required, we glue the motor onto the stand. Don't spare glue!
We connect the USB cable to the power wires of the engine. Of course, it is better to do this with a soldering iron, but given the meager power, you can get by with simple twisting. The main thing is not to forget to insulate the connection using electrical tape or tape.
How to determine the power pins of a USB cable
Any USB connector consists of 4 pins. We are not interested in averages, these are information wires. The 5 volt power supply is on the outermost contacts. Wiring in the illustration:
If you reverse the polarity, nothing bad will happen. The motor will simply spin in the wrong direction. How to determine the motor supply voltage? There is no need to look for markings. If the toy (where it was installed) is powered by three batteries (1.5 volts each), then the motor is 5 volts. If it runs on two batteries, it will not be suitable for USB power.
CD
Don't know how to make an efficient CD fan? It's easier than it seems. We divide the disk into 8 sectors. An even number of blades is easier to balance if axial runout occurs.
We cut out the blades with ordinary scissors. You can do this job using construction knife, or melt the sectors with a soldering iron - there is no big difference. If you accidentally break a CD, get a new one.
The extra segments are broken out, the rest are given the aerodynamic shape of a propeller. To do this, just heat the workpiece over a candle or using construction hair dryer. If you make a mistake with the geometry, you can always correct the situation by reheating. This is the advantage of crafts made from a CD.
In the center of the structure we glue a thickening: any piece of plastic 5–10 mm. We drill a hole in it for mounting on the electric motor shaft.
Where to get an electric motor
This design uses a drive from a floppy drive. Power supply is 5 volts, speed is moderate. Most likely, you do not have a separate disk drive collecting dust on a shelf; it can be found in the system unit. Nobody uses floppy disks anyway, you can safely disassemble it for spare parts.
The convenient flat motor housing allows you to assemble the fan on a flexible leg. To do this, twist a piece of single-core copper wire into a pigtail and attach it to the power cable using electrical tape.
The motor with the propeller is glued to the flexible stand either with hot glue or wrapped with the same electrical tape. Unless you're entering a fan design competition, you don't have to worry about aesthetics.
After spending 2–3 hours, you get a convenient, portable “device” that can be installed anywhere without leaving your computer.
Aesthetics from a plastic bottle
If you want not only fresh air, and to make the product pleasing to the eye, we use other materials. The basic components remain the same: a motor from a children's toy and an old USB cord. By the way, you can connect such a fan to a 220 volt outlet using a smartphone charger (with the same USB port).
The highlight of the design is the body. The propeller is made from a plastic bottle. The twisted plug will serve as an axial bushing. The stand can be made from a bunch of cocktail straws.
We assemble the elegant base from a second PET bottle and a CD glued to the bottom. If you have free components, you can install a connector and a switch.
Despite the “lightness” of the design, the fan turned out to be quite stable. If necessary, you can put some weight in the body.
Use of factory parts
Let's return to the presence of conditionally unnecessary computer components in the home workshop. For example, a cooler from a power supply or system unit.
The electrical part of the work is reduced to a minimum. If the power is 5 volts, we work according to the scheme: USB cable. To supply 12 volts you will have to look for a power supply or a phone charger. In addition, there are “turbines” that are connected to a 220 volt network.
Actually, to make a fan from a computer cooler, you just need to fix it on some kind of stand. And if you use batteries instead of a USB cord, the flow of fresh air can be organized anywhere.
Video on the topic
Sitting at a computer in the summer, many people begin to suffocate from the heat; it’s good if there is air conditioning, but it’s not always convenient to turn it on. In this article we will tell you how to make a USB fan with your own hands, from a motor, a cooler and a small engine. We will show you the manufacturing process and step by step instructions, we will highlight two of the simplest and most effective methods.
Making a fan using a computer cooler
To make a fan at home and not have to strain at all, we found this method on the Internet. The entire manufacturing process will take no more than 20 minutes, you can use old coolers or just buy a new one in the store, the price for them is now a pittance.
First we begin to prepare the cooler, it has two wires: red and black. We remove 10 mm of insulation from each wire; there is even an insulation stripper. The size of the cooler does not play a special role, of course, it is better if it is large, the wind flow will ultimately be stronger. 
We begin preparing the USB wire; to do this, cut off one half at the main cut and remove all the insulation. We will get four wires: two black and two red, we also strip them. If there are other green or green wires on the cooler white we cut them off, they just get in the way. Learn how to make a thermoelectric generator with your own hands.
In the end result, you need to connect the wires to each other, there may be several ways, the main thing to remember is color coding. Don’t forget to isolate everything from each other, the more isolation, the better. For convenience, the finished cooler can be installed in a regular shoe box, so it will be more stable. 
This is how the guys in the video suggest we make a fan from a cooler. The method is actually simple, we don’t promise strong airflow, but working at the computer will be much more pleasant.
How to make a USB fan with your own hands using a motor
So, to make a fan from a disk motor and a usb, we will need more time, but this type of fan will look better. Anyone can make such a device, the main thing is to show a little desire and patience. 
First of all we need to make the blades for our fan, we recommend using a regular CD drive, it looks great and is quite easy to make. Also read interesting article, where we make laser levels.
Here are the guys with the video showing a really cool method. In a similar way, you can make a fan out of paper, but remember, the paper must be thick; it is optimal to use cardboard.