"Eternal" mini-fan: is it possible to make it? How to make various types of fans with your own hands How to make a fan with your own hands from paper.
With the onset of heat, we remember fans, the simplest and most affordable human inventions for air freshening. The classic design of the fan consists of an engine, on the shaft of which an impeller with many blades is fixed. During the operation of the fan, air is sucked in from its rear side, and passing through the blades with increased speed is pushed forward, creating the effect of cooling and freshness.
A conventional fan has a number of disadvantages: noise and vibration from the blades, which collect dust and air pollution. In order to clean them, it is necessary to remove the protective grille. The speed of such fans is regulated in just a few modes, and it can be difficult to adjust the airflow angle at all.
The alternative device proposed by us is devoid of these shortcomings. This development was invented by Dyson engineers, presenting an almost revolutionary solution in the field of air ventilation. Thanks to them, the world learned what a bladeless fan is. And today we will collect it at home.
How a bladeless fan works
The main difference between a bladeless fan and a conventional fan is the changed direction of the ejected air flow. This is achieved due to the fact that the engine with the impeller is placed vertically and hidden in the base, which is equipped with gratings. Through them, air flows into a frame placed above the base and provided with slots around the perimeter for ventilation.Materials, tools for a bladeless fan
To assemble this cutting-edge household gadget, we need the following materials:- Pieces of PVC pipes with a diameter of 150, 125, 90 mm;
- Fast drying adhesive for plastics, such as superglue;
- A small piece of blue plexiglass or plexiglass;
- Server cooler YW880, frame width-60mm;
- Spray paint white, 1 can;
- A piece of soft metal mesh with cells of about 10 mm;
- Rheostat speed control board, toggle switch;
- Solder, flux, thermocambric, self-tapping screws;
- A piece of LED strip, length - about 50 cm;
- Power supply (adapter) for 12V/2 A;
- Insulating tape.
- Miter saw or grinder (angle grinder) for cutting PVC pipes;
- Jigsaw for cutting curved lines;
- Drill or screwdriver with a 50-60 mm crown cutter;
- A set of drills of various diameters;
- Soldering iron, screwdriver, scissors, pliers, hot glue gun;
- Painting knife.
Work procedure
Cooking plastic pipes
We take a piece of PVC pipe with a diameter of 150 mm and trim it, aligning the edges. We mark a fragment about 100 mm long, and make a cut with a miter saw or grinder (angle grinder).
The edges of all nozzles must be sanded to avoid burrs, unevenness and to improve the fit of the edges for adhesive bonding.
The next step is to select a plastic container that will fit snugly on our pipe section. We cut off the bottom of it with a paint knife, and with the help of superglue we fix it on the top of the pipe.
Then we take a pipe with a diameter of 125mm, and cut off a pipe 90mm long from it.
The next will be a pipe with a diameter of 90mm, which we also cut, like the previous two. This is the base of our fan. The length of the segment is 120-130mm.
Basic plastic parts are ready. You can check how they will be combined with each other by placing them in their places.
The fan frame sits perpendicularly on the base, so the 90mm nozzle needs to be slightly prepared by cutting its edge according to the frame circumference. We mark it with a pencil, you can cut it with a jigsaw or the same grinder.
Irregularities in a curved cut can be smoothed out with sandpaper, removing burrs at the same time.
Using a crown cutter with a diameter of 50-60mm, a drill or a screwdriver, we make a through hole in the middle of the largest branch pipe. It will allow airflow to pass through the base into our frame. We fix our base on superglue.
In order to close the fan frame, consisting of two pipe sections of different diameters, a plug is glued on the smaller of them from one end. We make it from a sheet of plexiglass or blue plexiglass.
Marking first a large circle, and then a smaller one, cut off the plug ring.
Now it can be put on superglue to the smaller nozzle of the frame.
Using white spray paint and duct tape as masking tape for the plexiglass, we paint over the plastic parts of our fan.
After the paint has dried, you can glue a piece of LED strip on the larger pipe from the side of the plug. Do not forget to immediately solder the contacts for the LED backlight, and bring them to the base.
We fix both nozzles of our frame with superglue.
Electrical part
We begin to prepare the electrical stuffing of our fan by soldering the cooler contacts. It is better to take the wires with a margin so that it is convenient to work with them when connecting the control board and toggle switch.
You can make mounting holes with a soldering iron to securely fix the cooler in the base case.
We fix the cooler, and drill two ventilation holes in the base opposite each other. This can be done with the same crown cutter.
We close these holes with fragments of a metal mesh, pre-cut to size.
We glue the fragments of the mesh with a hot glue gun.
We unsolder the contacts of the toggle switch and the power socket. We close the exposed contacts with heat-shrink tubing, warming them up with a lighter.
Now you can make holes for the toggle switch and the power socket, and fix them on the fan base case.
It is very hot in the southern regions, nothing will prevent you from acquiring 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 the best option, besides it is not too noisy during operation. At 12 volts the device will be heavy duty, loud and will "rattle" (due to vibration) on the table.
Required Components
The 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 use working cells to make a powerful battery (http://www.instructables.com/id/Free-lithium-Ion-Battery-Pack).
Required Parts:
- electric drill DC motor;
- 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 at high power for about 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 wire cutters, cut a circle out of the large fan grille so that its radius is about half an inch larger than the duct. 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.
The question is trivial. First, we recommend determining the installation location of a homemade fan. Two types of engines dominate in technology: collector (historically the first), asynchronous (invented by Nikola Tesla). The first ones are very noisy, switching sections causes a spark, the brushes rub, causing noise. An asynchronous motor with a squirrel-cage rotor is quieter, generates less interference. You can find the starter relay in the refrigerator. By adding a couple of phrases of humorous phrases, we will return the seriousness of the site. How to make a fan with your own hands, not to scare your family. Let's try to answer.
Aspects of designing a homemade fan
The device of the fan is so simple, it makes no sense to tell, paint the insides. What to consider when designing? Remember the growl of a cyclone vacuum cleaner, the volume is above 70 dB. Inside the commutator motor. More often deprived of the possibility of regulation of revolutions. Decide whether a similar sound pressure level is acceptable at the installation site of a home-made fan? Having chosen the second, we will concentrate on 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 wires along the generatrix, at an angle to the axis. The direction of the slope determines the direction of rotation of the motor rotor. Copper conductors are not isolated from the material of the drum, the conductivity of the Olympic metal exceeds the surrounding material (silumin), the potential difference between adjacent conductors is small. Current flows through copper. There is no contact between the stator and rotor, there is nowhere for the spark to come from (the wire is covered with varnish insulation).
The noise of an induction motor is determined by two factors:
- Alignment of the stator and rotor.
- Bearing quality.
By correctly setting up, maintaining an asynchronous motor, you can achieve almost complete noiselessness. We recommend that you consider whether the sound pressure level is important. The case concerns a duct fan - it is allowed to use a collector motor, the requirements will be set by the location of the section.
The duct fan is placed inside the duct section, mounted, breaking the path. For maintenance, the section is removed.
Noise is losing its dominance. The sound wave is attenuated as it passes through the duct. Particularly fast is the part of the spectrum that has inconsistent dimensions relative to the width/length of the tract section. Read more textbooks on acoustic lines. The commutator motor can be used in the basement, garage, devoid of people. The neighbors of the cooperative will hear, rather be too lazy to pay attention.
What is good about a collector engine, what are we fighting for the right to use. Three disadvantages of asynchronous:
At the initial moment, the induction motor does not develop a large torque, a number of special design measures are taken. The fan doesn't matter. Most household models are equipped with asynchronous motors. In production, the number of phases is increased to three.
Search fan motor
One YouTube video suggested using a 3 volt DC motor from a hardware store. Tops the USB cord, works by rotating the blade of the laser disc. Useful invention? If you are tired of an extra port, the heat will help you survive. It's easier to take a processor cooler, power it from the system unit. A yellow wire goes to 12 volts (red to 5). The black pair is the earth. Collect from an old computer. Citizens of the Russian Federation are simply too lazy to invent, we throw curious equipment into a landfill.
Asynchronous fan motors operate without a starting capacitor ... The peculiarity of fan motors is: they go straight with the winding. A couple of tips to help get the engine:
Make a fan impeller
The question of what to make a fan from has not been resolved, the authors keep silent about the impeller. First things first, the fridge! The compressor is blown by an impeller. You will get the motor, remove it. Come in handy. As for the washing machine, put the drum on an aircraft propeller. A plastic tank is suitable to make a case. Heat the bending points with a building hair dryer.
Inspect the blender, supply an unnecessary laser disc, which has received the shape of an impeller. You can make a fan yourself using improvised materials. It does not require much power, there is no point in being too zealous, honing the details. We believe readers know how to make a fan with their own hands.
Eternal fan from the CPU cooler
We decided to please readers by telling how to make a fan. The review is far from the first, I had to dig around, looking for something worthwhile. It looks chic the idea of creating an eternal fan that spins forever. A mail.ru user posted a design that looks attractive. Let's take a closer look, thinking along the way how to make a fan that runs forever.
You know, of course, system units work quietly (modern models). The slightest noise means: the cooler's axis has gone astray, or it's time to lubricate the aged fan. They work for hours, days add up to weeks, the system unit will last for years. Made possible by smart technology. Think about it, the noise depends on the magnitude of the friction force. Mechanical energy becomes thermal, acoustic due to the presence of roughness. CPU coolers rotate easily, it's worth blowing.
The author of the video - we apologize for the lack of a name, we justify it: the video is in English - it offers to assemble an eternal fan from an accessory. The accuracy of fitting parts is great, the blade turns easily. Costs are reduced to a minimum. The author of the video posted by the deirones channel noticed: the processor fan is powered by direct current. He climbed inside, found four coils, equally spaced around the circumference, with their axes directed towards the center of the device.
There are no commutators inside, which means a paradoxical fact: the field of the coils is constant.
If the asynchronous motor of a typical fan is powered by 220 volts alternating voltage, which creates a rotating magnetic field, in our case the picture is constant. One could say: inside the rotor sets in motion a commutator that creates the desired distribution. Not true, is confirmed by the further course of thought of the author, the result of experience. A Western innovator decides to replace the coil with a permanent magnet. Indeed, there is no alternating field - why electric current?
Defiantly, the author cuts off the power wire, places neodymium (hard disk) magnets around the perimeter of the frame. Each on the continuation of the axis of the coil. The work is finished, the blades cheerfully began to rotate. We believe that a principle that is hushed up in orthodox literature is simply used. Trade secret of the patent owner.
The initial movement of the blade is obtained by random fluctuations in the air. It resembles a magnetron, the buildup of oscillations is caused by the natural chaotic movement of elementary particles. The question arose as to what determines the direction of rotation. The design is absolutely symmetrical. We decided to figure it out, we express our observations:
Agree, it is more convenient than to stir up USB ports, constantly wasting batteries. The perpetual fan works from an arbitrary position, it is devoid of wires. We believe that the strength of the magnets plays a decisive role. The simple rule stops working: more is better. The golden mean is slipping. When the blades spin from a random flow of air, overcoming a field of neodymium pieces. Weak magnets are surely powerless to keep a steady rotation. The field strength must be exactly as produced by the coils when subjected to a voltage of +5 or +12 volts.
Correctly create an eternal fan
We discussed how to make a fan, we will measure the direction, the strength of the magnetic field of the coils. Use special devices. Magnetometer, teslameter, formed by magnetic induction converter, measuring module. When the fields interact, the resulting picture is obtained, which is called cohesion. The converter generates an EMF. The size determines the measured strength of the magnetic field. Like two fingers! It costs 10,000 rubles.
The magnets will be located at a considerable distance from the axis. The coils are much closer. You need to know how the picture changes with distance. According to Coulomb's law, the force falls in inverse proportion to the square of the distance, which is true for single charges of an arbitrary sign. Separate magnetic poles in nature have not yet been found (it is not possible to create), the cube of distance is introduced into the law. Let's say the distance to the coil from the axis is 1 cm, the diagonal perimeter is 10. This means that neodymium should be 10 x 10 x 10 = 1000 times stronger than a small coil.
No one obliges to place neodymium magnets on the diagonals of the fan perimeter. The poles lie crosswise. Regulate the strength of the impact over a wide range. By placing neodymium magnets in the center of the sides of the fan frame, we significantly increase the field strength. Let's do the calculation. Let's say the hypotenuse of a triangle with a side of 10 cm is a diagonal. The distance to the center of the square will be 10 / √2 = 7 cm. You see, the ratio drops from 1000, reaching 7 x 7 x 7 = 343. It is weighty, desperate to find strong neodymium magnets to create an eternal fan.
Let's measure strength! A compass is suitable (there are custom designs assembled by one's own hands, for example, http://polyus.clan.su/index/indikatory_magnitnogo_polja_svoimi_rukami/0-52). One coil should be connected to the power supply. Then find the position, the raised arrow will deviate by about 45 degrees (if you don’t like it, take any other azimuth). Then start experimenting with neodymium. Place the piece at different distances, making sure that the deflection of the arrow matches the one obtained when using the processor fan coil. Surely the distance is not equal to the diagonal, half of the side, neodymium will have to be broken, cut.
Sawing one edge along the length, we carefully break the parts on the nail, getting the desired field strength to create an eternal fan. We assume that the induction is distributed in proportion to the volume. Today they told intelligibly how to make a fan with your own hands!
Source of power
Those who want to make a fan with their own hands see 3 problems: get the engine, power, make a propeller. The parts must fit together. Three problems are solved, you start making a fan with your own hands. Today at home, an abundance of switching power supplies. Think it started in the 90s. Game consoles, mobile phones, other equipment. The equipment breaks down, switching power supplies remain. The voltage is sometimes non-standard, most motors work on any voltage. The RPM will just fluctuate with the voltage. Broken household appliances were lying around at home - immediately make a fan yourself.
Homemade fan power supplies
People are constantly trying to make a special fan with their own hands. One issue is more often left out of the discussion: the power supply. The device of the fan itself is so obvious that it makes no sense to dwell on it in more detail. So, it’s clear that there are an unthinkable amount of batteries today. Can they work for a long time? The answer is no. As a last resort, take the "crown", in Soviet times they were considered a reliable source of energy. The power supply is bad, the power will gradually decrease, the speed will decrease, and the person will be annoyed. Stability without additional effort is important. A small 12 volt battery is missing - get ready: let's start looking for how to make a homemade fan power source.
The first thing that comes to mind is to screw up the computer. It is known that miniature devices are powered by a USB port. Gadgets are recharged. The USB port is a source of inexhaustible energy. The voltage is low, you need a low voltage DC motor. We believe you can find at home, buy in a hardware store. How much will the power of the port: according to the old standards 2-3 watts. Another thing is to find a host device with an updated version of the interface (2014 was recognized as a rarity). The developers promised to give out 50 watts (even more, it's hard to believe). True, there will be more wires, nominal voltages will increase. We remind, according to tradition, power is supplied to the red (+), black (-) wires. White, green - signal.
It is clear that it is difficult to expect high power - even if the port supports it, the motor will not pull. It is recommended to look at the voltage more. The motor must be supplied with a higher voltage. For example, it is recommended to use a CPU cooler. The supply voltage is less than the prescribed 12 volts, the rotation speed will simply decrease. Beware of exceeding - the motor may burn out.
We are looking for energy, the issue is easier to solve than for 3 volts:
12 volt power supply for a do-it-yourself fan
We suggest not to assemble a switching power supply, to make a regular one with your own hands. Recall that the first ones are distinguished by small transformers. Therefore, the power supply will be relatively large in size. It will consist of the following parts:
- A step-down transformer. We will not name the number of turns in advance, the voltage is unknown, having straightened it with diodes, we get 12 volts. Of course, you can experiment, like a YouTube video about homemade radios, capturing the reader, we will look for a ready-made solution.
- The full-wave bridge, adding three to one diode, we increase the efficiency. Radio components are not very expensive.
- The backbone of the power supply is ready for a home-made fan to serve for a long time, we will straighten the network ripple. After the bridge, turn on the low-pass filter, redraw the circuit from the Internet.
The output is a constant voltage with an amplitude of 12 volts. Try not to mix up the terminals. Where the "plus" is, where the "minus" comes out can be understood by examining the diagram. Below is a drawing of the bridge, see, read the explanations. In radio electronics, the direction of the current is indicated opposite to the true one. Charges flow, according to beliefs, in the direction from plus to minus (towards electrons). Reading the circuit, you will see: for a diode, a transistor, the emitter marked with an arrow looks wrong. In the direction of positive charges. Each has marks, on the diagram it is indicated by a huge triangle arrow. Therefore, we always find out, “plus”, guided by the graphic symbols given in the drawing.
The figure shows: the plus will be on the right, it is transmitted according to the arrow of the diode to the lower output terminal. The minus will go up. With an alternating voltage (roughly speaking), plus, minus will alternate from left to right, the name of the rectifier will become clear - full-wave. Works on the positive part of the voltage and the negative. Diodes take power, low-frequency. Solid size, power dissipation is relatively large. You can calculate using a simple formula taken from a physics course. We multiply the resistance of an open p-n junction (leafing through the reference book) by the current consumed by the motor, taking the margin at least 2 times. The body of the motor contains an inscription indicating the power, can be divided by a voltage of 12 volts, simply multiply by 2 - 3, take a diode with equivalent dissipation power (see reference book).
Now let's calculate the transformer ... We went here http://radiolodka.ru/programmy/radiolyubitelskie/kalkulyatory-radiolyubitelya/, we chose the Trans50 program, we will master it. Note that among the software there is one that allows you to calculate the filter parameters. Do you regret that you were going to make a fan with your own hands? They offer to choose one of 5 windings. Steel is everywhere. You can do without, the losses will be great. Steel forms a magnetic circuit, energy goes to the secondary winding. It is better to find an old rusty transformer. The time is bad, in the hungry 90s, landfills are littered with plates of windings handed over for scrap. There were no problems with winding transformers.
It's time to understand how much voltage is required for the correct operation of the circuit. A term borrowed from electronics, effective AC voltage, will help. Voltage, on the active resistance, creating a thermal effect equal to the constant voltage of the effective amplitude. To obtain the required voltage value on the secondary winding, you need to divide 12 volts by 0.707 (one divided by the square root of 2). The authors received 17 volts. Engineering calculation sins with an error of 30%, let's take a small margin (part of the amplitude up to 1 volt will be lost on the diodes).
As for the secondary winding current (required for calculation), type something like “cooler power” in the search engine. Let's do it with the readers. Clever articles write: the current consumption of the cooler is indicated on the case. There will be a necessary parameter, we will substitute in the calculator. The voltage of the secondary winding, the author took 19 volts. The voltage drop across the p-n junctions of powerful silicon diodes is 0.5 - 0.7 volts. Therefore, an appropriate reserve is needed. Smart heads searched, concluded that the processor cooler does not consume more than 5 W, therefore, the current is 5 divided by 12 \u003d 0.417 A. We substitute the numbers for the downloaded calculator, for the tape core we get the design parameters of the transformer:
- Cross-sections of the magnetic circuit for winding 25 x 32 mm.
- The window in the magnetic core is 25 x 40 mm.
- The magnetic circuit is finished with a frame for winding wire 1 mm thick and with a cross section of 27 x 34 mm.
- The wire is wound along the larger side of the window, leaving a margin of 1 mm from the edges, a total of 38 mm.
The primary winding is formed by 1032 turns with a diameter of 0.43 mm. The approximate length of the wire is 142 meters, the total resistance is 17.15 ohms. The secondary winding consists of 105 turns of a copper conductor with varnish insulation with a diameter of 0.6 mm (length 16.5 meters, resistance 1 ohm). Now readers understand: the question of what to make a fan is starting to be solved with a core ...
How effective are the proposed technical solutions? Fans are known to Ancient Egypt. The video of Michael Jackson, recommending “remember the time” (Remember the time) testifies. The plot was hardly prepared without the advice of archaeologists and historians. We want to report that in Mexico, most ladies use fans. The Spaniards know how to deal with the heat, the country lies on the equator. Think...
Throughout the long winter, we look forward to pleasant summer days, and with the onset of a hot season, for some reason, we begin to dream of coolness. How deliciously the light breeze created by a small homemade fan will help restore strength and relieve fatigue. Plus, making it is incredibly fun, right?
We suggest that you familiarize yourself with step-by-step instructions for assembling the simplest effective devices from literally junk starting materials. The article presented to your attention details how to make a fan with your own hands and what a home master will need for this.
At your disposal is a detailed description of the manufacture of options, the effect of which has been tested in practice. You can make such devices with your own hands, without having any experience at all. For a complete perception of information, step-by-step photos and video instructions are attached.
The simplest fan can be made from CDs. It can be used, for example, for local impact on a user who spends a long time at the computer.
Let's prepare the source materials for the work:
- CD discs - 2 pcs.;
- low power motor;
- cork from a wine bottle;
- wire with USB plug;
- a tube or rectangle made of thick cardboard;
- soldering iron;
- candle or lighter, hot glue;
- pencil, ruler, checkered paper.
For our purposes, you can use a motor from an old toy, for example, from a typewriter. As a cardboard tube, a sleeve from a roll of toilet paper slightly ennobled with decorative finishing paper is suitable.
The main advantage of this model is that almost any do-it-yourself lover can find all the materials that are necessary for its manufacture.
The process of assembling a mini fan is quite simple.
Let's take one of the CD disks and use a marker to divide its surface into eight identical sections. The easiest way to do this is to use a piece of squared paper.
Let's draw a cross on it from a horizontal and vertical line. Each of the four resulting right angles is divided in half. Using cells, this is quite easy to do.
Using a very simple method using a checkered leaflet, we can achieve a perfect layout of the disk into eight equal sectors.
We impose a disk on our drawing so that the intersecting lines are in the very center of its hole. Alternately applying the ruler to the lines diverging from the center, we make markings on the disk. So the sections will be the same.
To divide the disk into blades, you should draw a soldering iron along the marking lines from the transparent part to the edge.
Scissors can also be used for cutting, but there is a danger that the workpiece will crack during operation. If there is no soldering iron, you need to use a knife preheated on the stove. When working with a soldering iron, welded plastic is formed along the edges of the cut, which is easily removed with a knife.
Cutting the disk with a soldering iron is the most effective method in which the workpiece does 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 expanded. If there is no candle, a lighter or blow dryer will do.
The central part of the disk should be heated, and all the blades should be turned in the same direction. A wine cork is placed in the opening of the disk. To better fix it, you need to pre-treat the edges of the hole with hot glue.
The USB cable must be connected to the motor. If we do not guess with the direction of rotation of the propeller, it will be possible to swap the occasions, that is, change the polarity.
The motor must be glued to the cardboard tube, and the tube itself to the second CD, which will act as the base of the stand.
When the plug is installed in the hole, the support of the second CD and cardboard tube, as well as the connecting device are already assembled, it is very important to properly fit the propeller on the motor shaft
Now the propeller needs to be “landed” on the stem of the future fan. We will try to make sure that it is installed strictly in the center. You can fix it in this position with hot glue.
After completion of all work, the fan is ready for use.
Although the construction of this device will not take you much time, but the result of the work done will undoubtedly please you.
How to make a similar, but slightly more complex design by including a regulator in the circuit, look at the video posted at the end of this article.
Do you find this homemade instructions complicated? Then you may be interested in information about and the rules for choosing them in order to purchase a ready-made appliance offered by manufacturers of household appliances.
Plastic bottle fan
What our craftsmen do from plastic bottles! It is time to say that the fan from them also turns out to be very good. It may not ventilate your entire room, but it will definitely help someone who is forced to work at a computer.
We offer two options for creating such a fan model.
Option #1 - hard plastic model
To do the job, we need:
- plastic bottle with a capacity of 1.5 liters;
- motor from an old toy;
- small switch;
- Duracell battery;
- marker;
- scissors;
- candle;
- hammer and nail;
- Styrofoam;
- hot glue gun.
So, we take an ordinary plastic bottle of 1.5 liters with a cork. At the level of the label line, cut off its upper part. It is she who we will need to make the propeller. We divide the surface of the plastic blank into six parts.
We are trying to mark it so that we get equal sectors: the quality of the future device depends on this.
We cut the workpiece according to the markup 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 of the blades must be rounded. We do it 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. We light it up. We heat each blade on it at the base in order to turn it in the direction we need. All blades must be turned in the same direction. We remove the cover from the workpiece and in its very center we punch a hole with a nail and a hammer.
We put the cork on the rod of a small motor. Such motors can remain from old children's toys. As a rule, getting them is not difficult. We fix the cork with glue.
Now you need to make a base on which the motor will hold. For this purpose, we take, for example, a piece of foam. We fix a rectangle on it, which can also be cut out of the foam packaging.
On the upper surface of this rectangle, our motor will be fixed, to which the propeller is attached. To do this, in the foam, you need to make a recess corresponding to the parameters of the motor.
Hot glue is used to fix the elements of the product. In its absence, other adhesives can be used. It is important that the mount itself is as reliable as possible.