The question is trivial. First, we recommend determining where to install your homemade fan. Two types of engines dominate in technology: commutator (historically the first), asynchronous (invented by Nikola Tesla). The first ones make a lot of noise, switching sections causes a spark, the brushes rub, causing noise. An asynchronous motor with a squirrel-cage rotor is quieter and generates less interference. You will find the start-up protection 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 without scaring your family. Let's try to answer.
Aspects of designing a homemade fan
The design of the fan is so simple that there is no point in telling or describing the insides. What to consider when designing? Remember the growl cyclonic vacuum cleaner, volume above 70 dB. Inside is a commutator motor. Often deprived of the ability to regulate speed. Decide whether a similar level is acceptable at the installation site for a homemade fan. sound pressure? Having chosen the second, we will concentrate on asynchronous motors, simple models do not require a starting winding. The power is low, the secondary EMF is induced by the stator field.
The drum of an asynchronous motor with a squirrel-cage rotor is cut with copper conductors along the generatrix, at an angle to the axis. The direction of the slope determines the direction of rotation of the engine rotor. Copper conductors are not insulated from the drum material, 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, the spark has nowhere to come from (the wire is covered with varnish insulation).
The noise of an asynchronous motor is determined by two factors:
- Alignment of stator and rotor.
- Bearing quality.
By properly setting up and servicing an asynchronous motor, you can achieve almost complete noiselessness. We recommend considering whether sound pressure level is important. The case concerns a duct fan - it is allowed to use a commutator motor, the requirements will be determined by the location of the section.
The duct fan is placed inside the air duct section and mounted, breaking the duct. The section is removed for maintenance.
Noise loses its dominant role. The sound wave, passing through the air duct, attenuates. Particularly fast is the part of the spectrum that has inconsistent dimensions relative to the width/length of the path section. Read more textbooks on acoustic lines. The brushed motor can be used in a basement, garage, or unoccupied areas. The neighbors of the cooperative will hear, but will rather be too lazy to pay attention.
What is good about a commutator engine, what are we fighting for the right to use? Three disadvantages of asynchronous:
At the initial moment asynchronous motor does not develop high torque, a number of special design measures are taken. It doesn't matter for the fan. Most household models are equipped with asynchronous motors. In production, the number of phases is increased to three.
Finding a motor for a fan
One YouTube video suggested using a 3 volt DC motor from a hardware store. Tops a USB cord, works by rotating the laser disc blade. Useful invention? If you're tired of the extra port, this will help you survive the heat. It’s easier to take a processor cooler and power it from the system unit. The yellow wire goes to 12 volts (red to 5). The black pair is earth. You can assemble it from an old computer. Citizens of the Russian Federation are simply too lazy to invent, so we throw interesting equipment into a landfill.
Asynchronous fan motors operate without a starting capacitor... The peculiarity of fan motors is that they come directly with a winding. A couple of tips to help you get an engine:
Make a fan impeller
The question of what to make a fan from has not been resolved; the authors kept silent about the impeller. First things first, the refrigerator! The compressor is blown by an impeller. When you get the motor out, remove it. It will come in handy. Concerning washing machine, launch the drum onto an aircraft propeller. Plastic tank It's good to make a body. Heat the bend areas with a hair dryer.
Inspect the blender and equip it with an unnecessary laser disk shaped like an impeller. You can make a fan yourself using available materials. You don't need a lot of power, and there's no point in trying too hard to fine-tune the details. We believe that readers know how to make a fan with their own hands.
Eternal CPU cooler fan
We decided to please our readers by telling you how to make a fan. This is not the first review, I had to dig around to find something worthwhile. Looks great idea to create eternal fan, spinning forever. User mail.ru posted a design that looks attractive. Let's take a closer look, while thinking about 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 is out of alignment, or it's time to lubricate the old fan. They work for hours, days add up to weeks, the system unit will last for years. It became possible thanks to well-thought-out technology. Think about it, noise depends on the magnitude of the friction force. Mechanical energy becomes thermal and acoustic due to the presence of roughness. CPU coolers rotate easily, just blow on them.
The author of the video - we apologize for the lack of a name, we justify: the video is in English - suggests assembling an eternal fan from an accessory. The fitting accuracy of the parts is high, the blade rotates 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. I climbed inside and 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 induction 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. You could say: inside the rotor sets in motion a commutator that creates the desired distribution. This is not true, and is confirmed by the author’s further train of thought and 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?
The author demonstratively cuts off the power cord and places neodymium magnets ( hard drive) frame perimeter. Each is on the continuation of the coil axis. The work is completed, the blades begin to rotate vigorously. We believe that a principle is simply used that is hushed up in orthodox literature. trade secret patent holder.
The initial movement of the blade is obtained by random air fluctuations. Reminiscent of a magnetron, the oscillations are caused by natural chaotic movement elementary particles. The question arose as to what determines the direction of rotation. The design is absolutely symmetrical. We decided to look into it and express our observations:
Agree, it’s more convenient than stirring things up USB ports, constantly wasting batteries. The eternal fan operates from an arbitrary position and is devoid of wires. We believe that the strength of the magnets plays a decisive role. The simple rule no longer works: more is better. A golden mean is emerging. When the blades spin from a random air flow, overcoming a field of neodymium pieces. Weak magnets are probably powerless to maintain stable rotation. The field strength must be exactly that created by the coils under the influence of +5 or +12 volts.
Correctly create an eternal fan
We discussed how to make a fan, we measured the direction and strength of the magnetic field of the coils. They use special devices. A magnetometer, Teslameter, is formed by a magnetic induction converter, a measuring module. When fields interact, the resulting pattern is called coupling. The converter generates EMF. The size is determined by the measured strength of the magnetic field. Like two fingers! 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 decreases in inverse proportion to the square of the distance, which is true for single charges of arbitrary sign. Separate magnetic poles have not yet been found in nature (it is not possible to create them); the cube of distance is included in 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.
Nobody obliges to place neodymium magnets around the fan perimeter on diagonals. The poles lie crosswise. Adjust the force of influence 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 equal to 10 / √2 = 7 cm. You see, the ratio drops from 1000, reaching 7 x 7 x 7 = 343. We are desperate to find strong neodymium magnets to create an eternal fan.
Let's measure the strength! A compass is suitable (there are custom designs that you can assemble yourself, 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 arrow brought up will deviate by about 45 degrees (if you don’t like it, take any other azimuth). Then start experimenting with neodymium. Place the piece on different removals, ensuring that the arrow deflection coincides with that obtained when using the processor fan coil. Surely the distance is not equal to the diagonal, half the side, the neodymium will have to be broken and cut.
By sawing one edge along the length, we carefully break the parts on a nail, obtaining the required field strength to create an eternal fan. We assume that the induction is distributed proportionally to the volume. Today we explained clearly how to make a fan with your own hands!
Power supply
Anyone who wants to make a fan with their own hands sees 3 problems: getting a motor, power supply, and making a propeller. The parts must fit together. Three problems solved, you can start making a fan with your own hands. Today there are an abundance of switching power supplies at home. Think about it, it started in the 90s. Game consoles, mobile phones, other equipment. Equipment breaks down, switching power supplies remain. The voltage is sometimes non-standard; most motors operate on any voltage. The revolutions will simply change according to the voltage. There's a broken one lying around at home Appliances– Make a fan yourself immediately.
Homemade fan power supplies
People are constantly trying to make a special fan with their own hands. One issue is often beyond the scope of discussion: the power source. The design of the fan itself is so obvious that there is no point in going into more detail. So, it’s clear that there are an unimaginable number of batteries today. Will they be able to work for a long time? The answer is no. As a last resort, take the “crown”; in Soviet times it was considered a reliable source of energy. The power supply is bad, the power will gradually drop, the speed will decrease, and it will irritate people. Stability without additional effort is important. There is no small 12 volt battery - get ready: let's start looking for how to make a power source for a homemade fan.
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 recharging. USB port is a source of inexhaustible energy. The voltage is low, you will need a low voltage DC motor. We believe you can find it at home or buy it at a hardware store. How much port power will be: according to old standards, 2–3 W. Another thing is to find a host device with an updated version of the interface (2014 was considered a rarity). The developers promised to deliver 50 W (it’s hard to believe even more). True, there will be more wires, the rated voltages will increase. We remind you that according to tradition, power is supplied to the red (+), black (-) wires. White, green - signal.
It’s clear that it’s difficult to expect much power - even if the port supports it, the motor won’t pull it. It is recommended to look for a higher voltage. The motor must be supplied with higher voltage. For example, it is recommended to use a processor cooler. The supply voltage is less than the required 12 volts, the rotation speed will simply decrease. Beware of exceeding it - the motor may burn out.
We are looking for energy, the question is easier to solve than for 3 volts:
12 volt power supply for a homemade do-it-yourself fan
We suggest that you do not assemble a switching power supply, but make a regular one with your own hands. Let us remember that the former are distinguished by small-sized transformers. Therefore, the power supply will be relatively large in size. Will consist of the following parts:
- A step-down transformer. We will not name the number of turns in advance, the voltage is unknown, rectifying it with diodes, we get 12 volts. Of course, you can experiment, like the YouTube video about homemade radios, grab the reader and look for a ready-made solution.
- The bridge is full-wave; by adding three to one diode, we increase the efficiency. Radio components are not very expensive.
- The backbone of the power supply is ready to homemade fan served for a long time, we will straighten the network ripple. After the bridge, we will turn on the low-pass filter and redraw the circuit from the Internet.
The output is a constant voltage with an amplitude of 12 volts. Be careful not to mix up the terminals. Where the “plus” comes out and where the “minus” comes out can be understood by studying the diagram. Below is a drawing of the bridge, look and read the explanations. In radio electronics, the direction of current is indicated opposite to the true one. Charges flow, according to popular belief, in the direction from plus to minus (towards electrons). Reading the diagram, you will see: the emitter of the diode, transistor, marked with an arrow, looks incorrectly. In the direction of movement of positive charges. Each one has marks and is indicated on the diagram by a huge triangle arrow. Therefore, we always find out “plus”, guided by graphic symbols shown in the drawing.
The figure shows: the plus will be on the right, transmitted according to the diode arrow to the lower output terminal. The minus will go up. With an alternating voltage (roughly speaking), plus and 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. Take power, low-frequency diodes. Solid size, power dissipation is relatively high. You can calculate using a simple formula taken from training course physics. We multiply the resistance of the open p-n junction (we leaf through the reference book) by the current consumed by the motor, taking a margin of at least 2 times. The motor housing contains an inscription indicating the power, which can be divided by the voltage of 12 volts, simply multiplied by 2 - 3, and taken a diode with equivalent power dissipation (see reference book).
Now let's calculate the transformer... We went here http://radiolodka.ru/programmy/radiolyubitelskie/kalkulyatory-radiolyubitelya/, chose the Trans50 program, we will master it. Please note that there is software that allows you to calculate filter parameters. Do you regret that you decided to make a fan yourself? They offer to choose one of 5 windings. Steel is involved everywhere. You can make do, the losses will be great. The steel forms a magnetic circuit, the energy goes to the secondary winding. It's better to find an old rusty transformer. Times are bad; in the hungry 90s, landfills were littered with plates of scrapped windings. There were no problems with winding the transformers.
It's time to understand what voltage is required for the correct operation of the circuit. A term borrowed from electronics will help: effective voltage alternating current. Voltage at the active resistance creating a thermal effect equal to the constant voltage of the effective amplitude. To obtain the required voltage 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. The engineering calculation has 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” into a search engine. Let's do it together with the readers. Smart articles write: the current consumption of the cooler is indicated on the case. Will required parameter, put it into the calculator. The author took the voltage of the secondary winding to be 19 volts. The voltage drop across p-n junctions of powerful silicon diodes is 0.5 - 0.7 volts. Therefore, an appropriate reserve is needed. Smart heads searched and concluded that the processor cooler does not consume more than 5 W, therefore, the current is 5 divided by 12 = 0.417 A. We substitute the numbers into the downloaded calculator, and for the strip core we get the transformer design parameters:
- The cross-section of the magnetic core for winding is 25 x 32 mm.
- Window in the magnetic circuit 25 x 40 mm.
- The magnetic core is finished with a frame for winding wire with a thickness of 1 mm and a cross-section of 27 x 34 mm.
- The wire is wound along the larger side of the window, leaving a margin of 1 mm from the edges, for 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 core 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 from begins to be decided by the core...
How effective are the proposed technical solutions? Fans are known Ancient Egypt. Evidenced by Michael Jackson's video recommending “Remember the time.” The plot was hardly prepared without the consultation of archaeologists and historians. We would like 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 about it...
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 sharp corners are bent towards the middle and strung one by one on 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 rotated slightly 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, strong big 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 remove them from an 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 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 most logical use of a computer fan for other purposes is, of course, a wind generator. The simplicity and affordability of a computer cooler has inspired many DIYers. The idea to create a portable charger with your own hands for mobile devices haunts many. So the author of this wonderful video tutorial has long wanted to check - what is this turntable really capable of?
We take any case fan, the larger the diameter, the better. Many naively believe that its electric motor will immediately turn into a generator, as soon as it is turned. However, the maximum that it is capable of in this design is to light a weak LED. Is this really the limit? Why so few? To understand the reason, you need to look inside the device. The trick is that such coolers have a brushless motor. It is not structurally designed to work in reverse mode as a generator, and here's why: its windings are wound in series double wire, and even opposite to each other, and the poles of the magnet alternate. Therefore, when the fan rotates, a back-emf will arise in the coils and such a generator will be ineffective.
The first method of reconstructing a cooler into a current generator
The first way out of this situation is to try to cure the original motor, that is, rewind the stator with a new wire. Of course, this procedure is very painstaking, but for those who know how to work with their hands, it is quite feasible.
And it’s even useful for educational purposes. The main thing now is to alternate the directions of winding the wire on each core. Thus, we get the simplest single-phase alternating current generator. The coils are connected to each other in series. The greater the number of turns and thinner than wire, all the better. The beginning of the first coil and the end of the last will be the terminals of our generator, respectively. Now you can assemble everything and check it. But do not forget that the voltage will be variable. Therefore, you need to make a simple straightener or buy a ready-made one.
After this entire treatment procedure, the indicators certainly improved, but not radically. The reason for this may be too big gap between the stator and rotor, and a weak ring magnet. It would be a stretch to call it a magnet. Plus, the rectifier still consumes from one to two volts. Unfortunately, such a rework did not justify itself.
The second option for converting a cooler into a windmill
Well, let's move on to plan “B”. Let's take a regular brush motor from a printer. It easily turns into a generator without any modifications. And thanks to the mechanical manifold, when rotating, it immediately produces D.C.. And no rectifiers are needed. Its starting force is minimal, which is important for a small impeller. However, it should be noted that for efficient work it requires high speeds, and therefore wind speed. Let's see what we can survive from it by conducting a series of tests. We can conclude that in wind speeds up to five meters per second there is nothing to catch at all, but in the range from five to ten meters per second it is quite possible to power a large LED flashlight and in practice use it for emergency lighting small rooms, corridors, street paths or as a beacon. You can dispense with batteries in a small radio, and if you add a storage device in the form of an ionistor to the circuit, the problem with gusts of wind will be solved and the design will become more practical. If you live in a high-rise building, then it is ideal to place such a wind generator on the balcony and find a use for it. But about charging mobile phones such a windmill, you will have to forget. There just isn't enough power. Getting the voltage up is not a problem; the phone’s circuitry will work for that and will show the charging process, but the current will be no more than 50 mA with a wind of about ten meters per second. And this is meager power. For normal charging you need ten times more. Alas, this is only possible with hurricane winds. By the way, the big advantage of a small windmill is that it is not afraid of strong gusts of wind and therefore does not need protection, and the cheapness and simplicity of the design can awaken the imagination much more more DIYers who are able to create miracles with their own hands.
The process of making a windmill from a computer cooler is shown in detail in the video.
Cool down, who can!
The summer heat can get to anyone. Especially in combination with dead calm. When it seems like everything around you is moving at the pace of a slow motion movie, and you can already drink the air rather than breathe it. Immediate cooling required! But no wind is expected, nor are there slaves with fans, as in oriental films. And if there is no opportunity to buy a motor with a propeller or the funds for it, there is nothing left but to make a fan with my own hands. Don't bend over from the heat, really! And the ubiquitous computer parts will help us in this noble cause.
If there is one cooler
This fan replacement can be easily connected to the USB port on your computer using a piece of cable with the appropriate connector. On both devices you can cut all the wires except red and black. They must be connected to each other (soldered or twisted) - of course, the same colors. All that remains is to insert the USB connector into the port - and... not be too happy. Because it is possible to make a fan this way, but if the cooler is more powerful than 5 V, it will blow much slower.
If there are several coolers
It is optimal if the coolers same sizes, and their number is a multiple of two. Let's say four. Follow the sequence of how to assemble a fan of this kind and note the time. We connect the “magnificent four” together with superglue (10 minutes). We connect them in parallel to the mobile phone charger (10 minutes). The structure is placed edge-on on the table and powered from the network (10 seconds). If the charging is designed for 5 V, and the coolers are 120 mm, a gentle breeze will blow over you. If it’s 12 V, the powerful flow will simply blow the homemade fan off the table! Unless, of course, it is properly secured. And if you are not afraid of catching a cold, because there will be a major draft. An even more powerful unit is obtained from fans freed from old computer power supplies. They can be carried in a regular bag, or they can be installed directly in the window opening instead of an air conditioner.
If there are no coolers
Don't tell me you don't have two unnecessary CDs or DVDs! However, to solve the problem of how to make a fan, you will need plastic or cardboard tube, a cork from a wine bottle, a motor from a children's toy and a cable for connecting it. One disk needs to be marked into equal eight parts with a pencil or needle. Then cut it exactly according to the markings, not reaching a little before the unpainted middle ring. The following operation must be done carefully. You need to heat the base of each fan blade in order and bend it in the desired direction at a small angle. Do not overheat the disk, otherwise it will shrink, the center of gravity will be disrupted, and the fan will vibrate unpleasantly during operation. A hole is punched exactly in the center of the plug for the electric motor shaft; it itself is connected to the blades. The motor is glued to the tube, and the tube is glued to the second disk (base). The blades are put on the motor. It is connected to a power source via a cable. Here's how to make a fan not only for yourself, but for anyone who needs some coolness in the middle of the heat!
Summer has arrived, which means heat, heat and an eternal lack of coolness. But this problem can be fixed, and quite easily. You only need a few details and a little free time to make your life easier with your own hands, to fill it with the light coolness that you will certainly receive by making USB fan Houses. Of course, you can go and buy a fan in a store, but how nice it will be to sit next to the same computer, and a light breeze from the USB fan you created will blow on you. And a thing created with your own hands always pleases not only the eye, but also develops self-love.
We invite you to watch a video of a homemade USB fan:
Tools for usb fan:
- A regular CD (not necessarily new);
- The tube of silicone glue is empty;
- Wooden block;
- Mini disk;
- USB cord;
- Motor;
- Holder;
- Adapter;
- Silicone glue gun.
You need to make three holes in the tube, one in the lid and two on the sides. Holes can be easily made using a regular nail, which must first be heated.
IN wooden block it is also necessary to make a slot or recess. This can be easily done using sandpaper.
The mini disk easily turns into a propeller. To do this, it must be drawn into uniform blades, then heated stationery knife and cut along the pre-drawn lines. And after that, we heat the base of each blade with a lighter and, using our hands, bend each blade a little to make a propeller.
We take the motor, holder and adapter from a non-working CD drive.
Now let's start assembling the USB fan.
Heat up the glue gun. Lubricate the holder along the axis with silicone glue from a glue gun. The propeller must be firmly seated on this glue. Press on all sides. Then, on the other side of the holder, add a drop of glue and glue the adapter. We wait until the glue dries well. This usually only takes a couple of minutes.
Now take a tube of silicone glue, remove the lid and coat the inside with silicone glue. And we insert the motor inside so that the part that we will connect sticks out of the hole that we originally made.
Then we insert the USB cord into the side hole of the glue tube and connect the ends of the wires to the motor.
You need to pour silicone glue into the recess in the wooden block, and place the wire from the USB cord tightly there, and glue the tube itself with the motor inside to the base of the block. And on the other side of the block we glue the CD with silicone glue.
Now the propeller needs to be placed on the side of the adapter glued to it onto the sharp edge of the motor, which sticks out of the hole in the tube from under the glue.
And finally, our USB fan can be plugged into the network and get that long-awaited coolness.
