How to make different types of fans with your own hands. Powerful do-it-yourself fan How to make a fan at home

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;
myself computer cooler(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 a black (minus) and red (plus) wire, which are supplied with voltage from motherboard computer. 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 school course In physics, we know that there are two types of connections - series 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.

Decor

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 a glue gun, which is usually used to make 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 duct tape, then you can fasten the coolers through the bolt holes with wire, and wrap the edges with black duct 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.

AT southern regions very hot, nothing will stop you from getting such a "super powerful" portable fan.

You can take an 18-volt electric drill motor, an RC airplane propeller, and a laptop battery. 4 volts is best option and not too noisy when working. At 12 volts the device will be heavy duty, loud and will "rattle" (due to vibration) on the table.

Required Components
Motor and batteries are the most expensive parts. You can buy a cheap used drill with a broken battery and just use the motor. Used laptop batteries usually have 6 cells and cannot work if one cell is dead. You can buy these batteries for next to nothing and take working cells to make powerful battery(http://www.instructables.com/id/Free-lithium-Ion-Battery-Pack).

Required Parts:

electric motor direct current electric drills;
laptop battery;
plastic fan blades;
1/8" plywood;
plywood and 2x1" engine mounts;
switch (in our case 2P2T switch for 2 speeds); - electric cable.

Checking the engine and batteries
Secure the fan motor to something solid.
You can try applying different voltages to it to adjust the desired wind strength. In our case, for a 4-volt battery, a current of 1.5A turned out to be ideal. An 8-volt battery for good power corresponds to a current of 3A.
Use 4 batteries, 4 in parallel at 4V and 2 sets of 2 batteries in parallel at 8V. So at low power they will last about 5 hours, and for high power for approximately 1.5 hours.
Connect the 2P2T wires with a switch to switch between series and parallel circuit.

Creating an air duct and mounting the engine
First, glue the 2x1” bars together to form a T. Measure the pieces to give the propeller about half an inch of clearance on each side.
After gluing the bars, round off their edges to give them a streamlined look.
To mount the engine, cut 2 triangles out of wood. Soak a piece of 1/8" plywood in water, then bend it and let it dry. You can cut 3 3.5" strips of wood grain perpendicular to the piece to make it easier to bend. Use the T-stacks as a base and glue 3 pieces of plywood over it, overlapping the joints and leaving one joint. Then glue the 3 ends of the T to the duct plywood. It is important to also try on the motor mount to make sure there is sufficient clearance.
Then cut two pieces of 1/4" plywood about 4.5 x 1.5 to form the duct support at the top. Glue these supports to the duct and to the "T".

Glue a piece of wood to the "T" to stop the motor from sliding backwards as the motor pushes the air forward and the motor itself then pushes back.
You can use 2 zip ties to secure the motor from below.

Battery layout
Use a 6-cell laptop battery to power the fan. For a bicycle fan in motion, you need a 12V fan. As a desktop fan, 4V or 8V is more than enough.

Wires to the engine
Solder two 14 gauge wires to the motor. Insulate with tape. To prevent the wires from falling into the blades, secure them to the fan support.

Testing
Feed the motor in parallel with 2 sets of 3 combined cells. The voltage should be around 11.8V. Even the multimeter should read 3.38A. The multimeter has some resistance, so the current is actually around 4A. More than 47 watts. This is already a very powerful little fan. At 16V, this fan can already push the bike decently.

Installation of protection
The propeller rotates too fast, so you need to install protection.
Using pliers, cut out a circle from protective grid a large fan so that its radius is larger than the duct by about half an inch. Wrap the wire around the duct. Then hot glue the front and back protection.

Switch installation
Install a switch. Now the fan can easily turn on and off. You can apply 2T2P switch, and get two rotation speeds.

Let's make a simple fan.
You will need:
1. 3V motor
2. Section for 2 batteries of 1.5 V. I took it in the CHIP and DIP store.
3. Switch.
4. Wire 15 cm.
5. Bobbins from fishing line or ropes, a jar from Polysorb, a jar of gouache.
6. Impeller from the cooler of the power supply.
7. Soldering iron.
8. Thermal gun.
9. Self-tapping screws 11 pcs. 2 cm long.

1. Take bobbins from threads with a diameter of 5 mm and a height of 4.5 cm - from a fishing line or cord.
We mark a hole for the switch with a marker and cut a hole with nail scissors a little smaller size switch and insert the switch into the reel:

2. Now we form the fan frame: let's make 3 reels together and mark four holes for bolts or self-tapping screws with a marker on the bottom of the upper reels. We burn holes through the edges of two bobbins:

3. Using a lighter, we melt and clean the red wire from the section with batteries and attach it to one switch terminal, and to the other - the second red wire. To isolate the terminals from contact with each other, fill them with hot glue:

4. We fasten the red wire to the plus + of the engine, and the black one, respectively, to the minus - of the engine:

5. The top can be made from a box of gouache: on the lid with a soldering iron we form a hole for wires and 3 holes for self-tapping screws. And on the box itself we cut a hole with nail scissors a little less than the diameter of the engine and place it inside. As in the case of a switch, you can pour hot glue on the outside for reliability.

6. We put the impeller from the cooler on the cork, fill the voids with plasticine or fill it with paraffin, make a hole in the cork with a self-tapping screw or an awl, fill it epoxy glue or hot glue, and put on the engine. If this epoxy resin- leave to dry for a day and only then turn it on!

You are sitting at the computer, summer is outside, there is no air conditioning. The hand is already tired of endlessly fanning itself with a newspaper, and sweat drips from the forehead onto the keyboard. Familiar situation? If there is no extra money, a homemade fan will help. To make it, you do not need to run to the store for details. Everything you need for a blower is in the house. Don't know how to make a free fan at home? Follow the text!

What is an air cooler made of?

engine
fan blades
stand
source of power

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 homemade products, there are probably some in the house useful trash. Otherwise, you do not need to know how to make a fan with your own hands.

Did you find an electric motor in the box with unnecessary parts? You can make a fan out of a motor from an old drive or a broken toy. Consider a few examples of how to make a mini fan from improvised materials.

Glue, cardboard, toy motor

To make a small propeller, you will need a piece of corrugated cardboard 30 × 30 cm.

We glue the support in 2-3 layers, the area is not less than two palms. We make a rack for the engine in the form of a prism 10–15 cm high. For cutting, we will use a clerical knife. We bend the design along the line.

How to make a mini fan durable and stable? Let's use glue gun. No other adhesive will make the connection as secure.

We connect with hot glue, and as thick as possible: the design should turn out to be monolithic. The blades can be made from thinner cardboard. Suitable packaging from an accessory for a mobile phone.

This is the most critical element: the blades must be exactly the same in shape and weight. Otherwise, your propeller will vibrate during operation, and quickly fall apart.

We glue the blades (carefully) on a cardboard sleeve, observing aerodynamics. The planes should be turned 30–45 degrees in opposite directions. For simplicity of design, we assemble a USB fan with two blades. They are easier to balance, and such a propeller will cope with cooling no worse than a three-blade one.

Trial run and balancing

We make a hole in the very center of the bushing (using an awl), put 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 reverse side. If vibration is present, the propeller can be easily balanced by simply crawling the blades. After making sure that the propeller spins smoothly and blows where it is required, we glue the motor onto the stand. Clay do not feel sorry!

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 a simple twist. The main thing is not to forget to insulate the connection with electrical tape or tape.

How to determine the power contacts of a USB wire

Any USB connector consists of 4 pins. We are not interested in the middle ones, these are information wires. The 5 volt supply is at the extreme contacts. Desoldering in the illustration:

If you reverse the polarity, nothing bad will happen. The motor will just 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 is powered by two batteries, it will not work for USB power.

Compact disc

You don't know how to make an efficient CD fan? It's easier than it looks. We mark the disk into 8 sectors. An even number of blades is easier to balance if axial runout occurs.

Cut out the blades with regular scissors. You can do this work with a construction knife, or melt the sectors with a soldering iron - there is not much difference. If you inadvertently break a CD, get a new one.

The extra segments are broken out, the rest are given the aerodynamic shape of the propeller. To do this, it is enough to heat the workpiece over a candle or with the help of building 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.

Glue a thickening in the center of the structure: any piece of plastic 5-10 mm. We drill a hole in it for landing on the motor shaft.

Where to get an electric motor

In this design, a drive from a disk drive is used. Power supply 5 volts, moderate speed. Most likely, you do not have a separate disk drive gathering dust on the shelf, it can be found in system unit. No one uses floppy disks anyway, you can safely disassemble it for spare parts.

Convenient flat motor housing allows you to assemble the fan on a flexible leg. To do this, we twist a piece of single-core copper wire into a pigtail, and wind it to the power cable with electrical tape.

A motor with a propeller is glued to a flexible stand either with hot glue or wrapped with the same electrical tape. Unless you're going to enter a fan design contest, 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 child's toy and an old USB cable. By the way, you can connect such a fan to a 220 volt outlet using Charger for smartphone (with that de usb port).

The highlight of the design is the body. The propeller is made from plastic bottle. The twisted plug will serve as an axial sleeve. The rack can be made from a bunch of straws for a cocktail.

We assemble an elegant base from the second PET bottle and a CD glued from below. With free accessories, 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 case.

Using Factory Parts

We return to the presence in the home workshop of conditionally unnecessary components for the computer. For example, a cooler from a power supply or a system unit.

The electrical part of the work is reduced to a minimum. If the power supply 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 out of a cooler from a computer, it is enough to fix it on some kind of stand. And if you use batteries instead of a USB cable, you can organize a flow of fresh air anywhere.

Creating a fan from a cooler

The easiest way to make a fan yourself is to use an unnecessary cooler (these are used in a computer as a cooling system for components).

Not surprisingly, this method is the simplest, because the cooler is just a small fan. It remains only to take a few simple steps to give it its final shape and performance.

The cooler itself is quite functional, but you need to prepare it for non-standard way usage:

Wires.

If the fan is located near the computer, an ordinary unnecessary USB cable will do. It needs to be cut and the insulation removed (same with the cooler wires):

We are only interested in two wires: red (plus) and black (minus). If there are other colors in the cooler or USB cable, feel free to cut them off and isolate them, because they are absolutely unnecessary and will only interfere.

Compound.

After cleaning, the wires must be connected to each other (it is enough to twist them tightly with each other). Don't mix up the colors. This threatens with serious complications in the process of creating a fan.

For twisting, 10 mm length is enough. If necessary, it is allowed to clean most of the wire, this is not scary, but much more will have to be insulated.

Safety.

Remember that proper insulation is the key to success and a guarantee that the computer or outlet will not short out. Bare wires should be sealed with electrical tape (only in the absence of power), and the thicker it is, the better.

There is no particular point in explaining what threatens the fall of "minus" to "plus". If the red and black wires come into contact during the transmission of electricity, not only the USB wire / port, but also the computer components may burn out.

In principle, computers are not afraid of such moments if they are equipped with protection against voltage surges. But when a wall socket is used, it will be much more difficult to repair the wiring in the apartment. small fan.

Therefore, seriously take care of the insulation of bare parts of the wires. Extra complexity is rarely needed.

Final touches.

Do not forget that a computer cooler is very light, but at the same time very fast. Even with a voltage of 5 volts, its speed will be quite high. We consider this voltage for a reason: the cooler will perfectly cope with its task, and the operation will be as silent as possible.

Due to the small dimensions of the device, vibration and vibration may cause it to fall. This should not be allowed for the following reasons:

such a cooler cannot cause lethal cuts even during operation, but there are no guarantees that the device will not jump up and fly off, for example, in the face;
falling on a non-flat surface (on a pencil, pen, lighter), its blades can be damaged: fragments broken off at such a rotation speed can cause irreparable damage;
other unforeseen circumstances.

Therefore, it is important to fix the cooler (with adhesive tape, glue) on some more stable surface: a box, wooden block, table.

Additional functions.

If desired, the finished fan can be updated externally, add a switch (so as not to pull out the cord every time), etc. But attention is also paid to a method that relatively well increases the efficiency of the device.

Easy enough to cut upper part plastic bottle and glue it (wide hole) to the cooler frame. Thus, the air flow will be more precise and directed: the force of air movement will be stronger by about 20%, which is a pretty good indicator.

This completes the creation of the fan, and it is ready for full-fledged work.

Disk fan

If the previous option does not suit you, and you want something more complex, then consider independent creation fan from computer disks:

Engine.

Since we do not use a cooler, it is necessary to acquire some kind of motor that sets the blades of our future device in motion. In fact, you can use the motor of the already mentioned cooler of the cooling system, but this is too simple.

You should find or buy a motor with a certain part of it moving (for example, a protruding iron rod). Since we are making a fan from disks, then the presence of such a rod will the best option. Motors from an old VCR or player are also great, because they spin discs and cassettes - just what we need for a spinning propeller in our fan.

Do not use an engine washing machine or even a past fan - they are extremely powerful. Due to self-assembly of the structure, it will be very flimsy. A strong motor in the very first seconds will spread the fragments of the blades around the room and fly off the base.

If there is a running motor, it must be fastened with wires in the previously mentioned form.

With a running engine on hand, we need to concentrate on the disks, which are the main components of our fan. First cut one into 8 equal parts:

In order not to make a mistake during the procedure, you can pre-mark the disk with a pencil. It is best to use a soldering iron (there will be no sharp edges, it is safer), but regular scissors will work.

After that, the disk should be slightly heated with a lighter so that the material becomes more pliable, and the wings should be bent in the manner of blades, like conventional fans:

The same can be done with the usual plastic bottle:

In the center of our propeller you need to put wooden cork from the bottle. If the size is too big - it can be planed.

The rest of the parts.

As a center holding the entire structure, you can use a regular roll sleeve toilet paper:

It should be fixed in the center of the second disk, which will serve as the foundation for the fan. From above, you can place half of the second sleeve, as seen in the photo, so that the motor is inside it. On it you need to hang the blades from the disk / bottle.

The fan is ready to work. Optionally, you can add decorative elements to make the device look more presentable.

And you can see clearly how such a fan is made from a bottle in this video.

Additionally, it should be recalled that important points while creating homemade fan:

To fasten the parts to each other, you must use high-quality "superglue".

It is the very one that cannot be peeled off even if desired. The entire structure must be as stable as possible and not succumb to vibrations and vibrations. Responsibly and cover everything you see with glue, except for the blades and internal parts of the engine.

Take your time.

You risk missing important detail, and this significantly increases the chances that something will go wrong during the operation of the finished fan. The consequences can be very serious.

Don't use bad parts.

If you do not need the motor that is used to create the engine, its performance may be in doubt. Make sure it lasts for a while and will be effective.

Building an engine from scratch is a highly specialized process and requires good knowledge. Make sure the motherboards are in order, everything necessary connections were soldered well, etc. It is better to check once again than to make another fan later.

Insulation.

We remind you once again: do not forget about the high-quality winding of wires with electrical tape. You should not save it, because short circuits and their repair will force you to sacrifice big expenses. Perhaps even in terms of money.

A hand-held fan is quite compact, efficient and does its job well. It is not difficult to make it if you take the procedure responsibly and follow the instructions. There are no restrictions on dimensions: if you feel strong, feel free to start assembling the fan bigger size.

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