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 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
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.
From time to time there is a need for a kind of fan, but small models cost relatively much. Do not rush to fork out, because a small fan can be easily made with my own hands. In terms of efficiency, it is not inferior to purchased counterparts, and its creation will require a minimum amount of materials.
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 a non-standard way of using it:
- 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.
- Security.
remember, that proper insulation- the key to success and a guarantee that the computer or the outlet will not short-circuit. 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 outlet is used, fixing the wiring in the apartment will be much more difficult than creating a 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, a wooden block, a 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.
Simply cut off the top of a plastic bottle and glue it (with a 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 first few 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 pieces:
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 to make the material more pliable, and bend the wings in the manner of the blades, like conventional fans:
You can do the same with a regular plastic bottle:
In the center of our propeller you need to put a wooden bottle cap. 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 when creating a homemade fan:
- To fasten the parts to each other, you must use high-quality "superglue".
It is the 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. Be responsible and glue everything you see, except for the blades and internal parts engine.
- Do not hurry.
You run the risk of missing an important detail, and this greatly 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 that the motherboards are in order, all the necessary connections are 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.
In contact with
The fan is not a complex device. It consists of a motor, blades, various adjustment buttons and a stand-case. There are additional elements, such as backlight, clock, but these are already options that are not so important.
It is not at all necessary to buy a fan, because it is quite possible to make it yourself. Moreover, this does not require special skills of the master.
With the proper skill, a home-made model will turn out not to be a way to get rid of old things, but an opportunity to show imagination and, possibly, hidden talents. Some craftsmen quite simply get both functional and extremely attractive options. They harmoniously complement the interior and become the center of attention no worse than any art object.
How to make a fan from a conventional electric motor
Probably the easiest and fast way to get a self-assembled home-made fan is to find an ordinary motor, which is most often found in toys.
Standard electric motor from a toy
Ordering such a thing is not difficult. Moreover, today, without stopping for a minute, caravans of various knick-knacks from the Celestial Empire ply. And if not, then it’s enough to buy an inexpensive toy car and remove the motor from it.
But expect the impossible from such a device is definitely not worth it. Rather, it can only slightly drive air. But for a desktop model it will do. He will be able to blow the face of the person sitting at the computer.
For such a fan, you can use absolutely anything. The main parts will be:
- blades;
- motor;
- on/off button;
- stand;
- supply system.
Otherwise, the limit of the idea will be only within the boundaries of fantasy.
After the motor is ready for use, it makes sense to take care of the power. These can be batteries, as in the toy for which the motor was intended. But, of course, such energy will not last long. However, there is a plus - the device will remain compact and mobile.
The second option is mains power. But in this case, don't overdo it. Direct connection through the plug is a sure way to burn out the motor. So do not experiment, trying to spin the engine up to high speed. On toys, electric motors are usually designed for 3-4.5 Volts, and the desire to give more rotation due to powerful energy sources, firstly, will quickly land the source (if it is a battery), and secondly, it will seriously reduce the life of the fan up to breakage. The motor will start to heat up, the brushes may melt.
But modern chargers convert the voltage in the network, reducing it to the specified parameters. You can find a power supply, including on sale, which is ideal for the motor.
To create the blades, you can already take any material. The main thing is that it should be light. Due to the weakness of the motor, the less the blades weigh, the faster the rotations will be, and, therefore, the efficiency of the work.
- The easiest option is to take a cork from an ordinary plastic bottle, which will serve as a fastener for the blades. Make a hole in the bottle according to the size of the rotating axis of the electric motor.
- Blades can be made from a regular CD. A hole is burned in the center according to the size of the cork from the bottle. The circumference of the disk is divided into 8 sectors. They are cut for some distance, but not to the center. After that, the disk must be heated with fire in order to easily bend the blades. For this, a lighter is suitable.
Creating Blades on CD
- You can attach the disc to the cork with glue. The second option - when a hole is burned in the middle for the cork - immediately connect the structure. The melted plastic will harden and hold firmly.
- After all this, the structure is interconnected. Wire is suitable for the stand. This is perhaps the easiest option. And for such a light device, you can’t imagine better. You can bend the skeleton in such a way as to discreetly hide the batteries there. Or carefully run the power supply wire going to the motor.
- The circuit should not always be closed if batteries are used, so a button must be fixed on the case. She is inexpensive. You can use it from the toy from which the motor was removed.
Another version of the propeller device is the use of paper, only thick. The method is even simpler, but less practical.
Advice! When experimenting, remember that the larger the fan blade area, the more noisy it will be. On the other hand, small blades do not move air as efficiently.
How to make a paper fan
Paper is not the best material for a home fan for the simple reason that it is very impractical. Any ingress of water, even banal humidity - and the device will rapidly begin to lose its rigidity.
But even despite all the disadvantages, craftsmen even make quite nice samples from paper. Of course, we are talking about thick paper or cardboard. Strong material from boxes is good. A regular motor or cooler, an on / off button and wires are also useful.
The simplest table fan using cardboard
An approximate design plan is that the device can be simplified as much as possible. The impeller is easy to cut and can have many or few blades. All at the request of the master. The motor can be mounted on a wooden or cardboard bar. The stand will also go from paper or an old computer disk.
It is only important not to forget that such a fan turns out to be very light, which makes it shaky in operation. Therefore, it is necessary to further strengthen the body. Old batteries, bolts or nuts are good.
How to make a plastic bottle fan
Crazy Hands' favorite raw material - plastic bottles - are almost perfect for creating your own fan. For a propeller, the top of a standard round bottle works well. It is necessary to cut off the part with the cork just above the glued label.
- The part of the bottle with the cork will be the blades. To do this, the plastic before the cork needs to be cut so that several different petals are obtained. After one, the petals are cut off at the base. The rest are the future propeller blades.
Plastic bottle fan blades
- To shape the blades and twist them a little, you can use a candle or a lighter. The main thing is not to overdo it, because the plastic is soft and can catch fire. The task is to warm it up a little, and not set it on fire.
- The cork will be the base of the propeller. A hole is made in it according to the dimensions of the axis of the motor. To keep the connection firmly, you can put it on glue.
- Now is the time to think about the foundation. The rest of the plastic bottle is also suitable for it. A hole is cut in it to firmly place the cork with the blades at a right angle. It is necessary not to forget to weight the base - with nuts, bolts or any other metal objects.
- A hole is made on the base for the button and the chain is assembled. There is also enough space for the power supply.
Field for imagination when working with plastic bottle extensively. You can use several bottles at once. One will become a propeller (more precisely, part of it), and the second will become a good base. But then you will need Additional materials. For example, regular drinking straws.
Simple and lightweight bottle fan
How to make a usb fan
But the most convenient and simplest fan is exactly the old cooler, which can also be used. For example, put it on the table, and it will cool, only not the processor or video card, but the person.
The advantages of this design are obvious: the cooler is very reliable, because it is his job to constantly turn the impeller and cool something. Yes, and getting coolers is easy. It is enough to either find an old computer, or order a new fan or buy it in a store.
The cooler device is simple. This is a ready-made fan in a plastic case. Two wires (usually red and black) depart from it.
Regular computer cooler
Making a USB fan is a matter of minutes:
- The wires on the cooler are stripped by 1-2 centimeters.
- A regular USB cable is taken, at the end of which you also need to get rid of the insulation. The standard USB cord has four wires inside. Of these, you should choose black and red. Cut off the rest so as not to interfere, and clean up the necessary ones.
- Connect the red wire of the cord to the red one on the cooler. Black - with black. Carefully insulate areas without winding. Ready.
- It remains only to think about the holding device. Here the already familiar wire, which takes any shape, can come in handy. Even a cardboard box will do for the fan case, and if you spend a little more time and effort, you can even build a real design object.
Design approach to the design of the fan
It is very convenient when the fan turns on when you start the computer. In addition, modern blocks have several USB outputs at once. It turns out that such a device will not interfere.
Another point - sometimes you want to turn on the fan regardless of the computer's operation (especially since a device with a cooler turns out to be quite powerful, good and useful). Then you can use adapters. For example, phones today make chargers that easily turn into a USB cord when the plug is disconnected. Similar equipment can also be used for a fan, making it universal: powered from the network and from the USB port of any computer. Another plus of this design is the simplest electrical circuit. A cooler-based fan can even do without extra buttons: just a wire and a plug.
DIY bladeless fan
But a slightly uncommon use of a free cooler (but you can get by with an electric motor) is a bladeless fan. Modern, interesting, with due skill - no less effective - a solution that definitely attracts the eye. The thing turns out to be completely non-standard, spectacular.
For example, here's the perfect appearance bladeless or duct fan model:
This is how you can make a bladeless fan with your own hands
The most important thing about bladeless models is, of course, their appearance. Therefore, if you make such a device yourself, then you need to try to think through the frame in great detail. Rough edges, roughness - all this will spoil the impression.
Frame bladeless fan is almost entirely a workspace. Do not think that some space technologies are implemented here.
Air circulation is carried out quite prosaically - with the help of rotating blades. They hide in a tuba base. If you take a cooler from a computer, then you can make a stand according to its shape. Here, as they say, at the discretion of the author.
The differences from the classics are in the location of the cooler - it is placed horizontally in a bladeless fan.
Location of the cooler in a bladeless fan
The upper ring is made hollow inside, two-layer. There, the main redirection of air in the right direction is carried out.
A hollow cavity is visible in the upper ring of the fan, from where air blows
You can make the frame of a bladeless fan out of plastic, wood, thick cardboard. It is better to use a flexible material so that it can be easily shaped into a ring. Alternatively, use a combined structure. For example, rings are made of cardboard or plastic, and the frame is rigid - made of wood.
You need to cut out:
- four faces for the stand;
- Two circles of the same radius;
- Twist two rings of different diameters.
Then everything is connected together, if necessary - painted.
Meals can be organized in different ways. A universal option - a combined cable for a USB connector and a plug-in plug for an outlet.
The device can also be slightly complicated. For example, make a light strip from a diode tape along the edge of the rim. The backlight consumes little energy, but it will add beauty to the fan. And the power supply and wiring, if necessary, can be easily hidden in the stand.
How to make a powerful fan with your own hands
When it comes to powerful fans, you need to understand that they require completely different motors. Starting from motors of old fans, ending with others household appliances. Well suited:
- unnecessary ceiling chandeliers with fan;
- old lawn mowers;
- drills;
- hoods.
The only thing you need to get into the voltage corridor, which is required to power the motor. For example, drills most often need 18 volts. But for ventilation purposes, it will be sufficient to supply less than half of this voltage. Even at 12 volts, the fans are very loud and extremely unstable due to the strong inertia of the rotating blades.
Power for powerful electric motors must be done from the network. Therefore, you need to think about installing a power supply or connecting a charger. The wiring diagram can be complicated by adding light bulbs, an electronic clock, a radio, a toggle switch or a board for switching operating modes. But it's easier, of course, to limit yourself to only a fan with a button, if that's enough.
In any case, such homemade variations of homemade fans are sometimes much better even purchased options. With proper skill, a very good thing can turn out, the real pride of the owner.
Hot. If I may say so, even too much. That is why you can think about how to make a fan. You will say that it can be purchased at the store. But, firstly, their cost increases significantly. Secondly, they are quickly dismantled and it is not always possible to find the necessary ones on store shelves. Therefore, several practical advice about how to assemble the fan. After all, it is quite possible to arrange even at home from available materials. Here are a couple of options.
How to make a fan based on an old cooler. If you have an old one, you can take it from there. Borrow a switch there as well. Also, in order to make a homemade fan, you will need some kind of battery holder. There are many of them, you can take it from some broken toy or something else in the same vein. Of course, you will need the batteries themselves in the amount of several pieces. It remains to connect all these components together, and a simple fan will be ready. If you don’t want to bother with the holder, you can use a regular USB port to supply power. You can make a stand out of anything. It all depends specifically on your own imagination and what you have at hand.
You can, for example, make a stand out of an ordinary hard wire attached to something. It is not so important what materials will be used, but how stable the whole structure will be.
Another option, how to make a fan, may be useful for enthusiasts. An excellent tool for manufacturing will be computer disks. What else will be required? A motor from a simple toy, a cork left over from champagne, some kind of handy switch and a few batteries. We take the disk, and then we make as many cuts as we need the blades. It is necessary to leave about a centimeter to the inner edge. Then turn each of the blades slightly at an angle. It bends much better if the disk is heated, for example, over gas. Then you will need to insert a champagne cork into its center. If you make a small puncture in its center, for example, with an awl, you can easily attach the entire structure to some kind of pin. You will need to make a leg - absolutely any object in the form of a cylinder, which is able to accommodate batteries and wires, can act in its role.
You will also need to arrange the base for the entire unit - it can also be any, the main thing is that it is stable and can hold the structure on itself. It remains only to add a few additional tips - when cutting the blades, you need to ensure that each of them is approximately 45 degrees - eventually you will come out with about 8 pieces. The cork inserted into the center of the disk will need to be fixed with glue. In any case, the process should not cause you any difficulties.
If you have been thinking about how to make a fan, now you probably understand that it is very simple. Each of the proposed models is extremely easy to manufacture, and you will not need much time to create it. You don't need anything special, the above is enough. These fans are very handy and compact. You can put it on your desktop. Or, if there is such a desire, take it with you to the garage or to the dacha, where these devices will be cooling means. It is difficult to argue with the fact that they have a tangible advantage - after all, these, by and large, very useful things are collected from various rubbish.
As you can see, it is quite possible to make a fan on your own, from improvised materials, without bothering with going to the store and looking for a unit that suits you at an affordable price. Everything is much easier.
If there is no air conditioning or even a domestic fan at home, and summer heat does not allow you to live normally, you can turn on your ingenuity and use old computer parts. Any craftsman can assemble a fan from a cooler, fortunately, building materials are always at hand, and in every home or office you can fish out something useful from computer trash.
Materials for useful crafts
To make this simple DIY device, you will need the following materials and tools:
- soldering iron and related accessories (solder, rosin);
- a piece of USB cable of any length;
- knife, wire cutters, electrical tape;
- the computer cooler itself (one or more).
The fan will be connected via USB to the computer. This makes it possible to dispense with the use of a fan without third-party power supplies.
There are coolers different sizes. Their design includes wires with which you can adjust the number of revolutions depending on the temperature of the CPU. In our case, these wires are not needed - we will only work with 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 pass it between the soldered wires. Wind one wire so that the tin-plated contact is securely insulated and no pieces of bare conductor are visible through the layers of electrical tape. Next, you need to cut off another piece of electrical tape and do the same with the second wire.
Stand
It's time to think about the fan stand you just made. You will need a piece of copper or aluminum wire. Take a piece of wire and bend it in the shape of the letter "P". Thread the ends through the bottom two bolt holes on the cooler. Bend the wire and thread the ends through the top holes. Now you can adjust the fan tilt level.
If there are many fans
You can make a whole battery of fans with your own hands. To assemble a fan from four or more coolers, you need to know how to properly connect them to a power source (computer USB connector), as well as how to connect these fans to each other.
Connecting cables
From the school physics course, we know that there are two types of connections - serial and parallel. With the first type of connection, you need to take the red (positive) wire from the USB cable and connect it to the red wire of the first cooler, and connect the black wire of the first cooler to the red wire of the second cooler, and so on. The last one, black, is connected to a residential USB cable of the same color.
Parallel connection is much simpler: all the red wires are assembled in one twist, just like the black ones. The red wires connect to the red wire of the USB cable, and the black wires, respectively, to the black one. For greater reliability of contact, it is necessary to make tinning and wrap the contact points with electrical tape, as described above.
Registration
Now you need to think about the design of the fan unit that you made with your own hands. In order to collect all the coolers together, you need to decide what shape the design will be in the form of. You may find it easier to fold them in a square or just line them up.
In any case, for these purposes you will need 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 electrical tape, then you can fasten the coolers through the bolt holes with wire, and wrap the edges with black electrical tape.
So, you managed to make sure that making a simple blowing of the room with your own hands is simple and accessible even to a person who is far from technical creativity. Such simple solutions are able to help out in a situation where you need to provide coolness in the room in calm weather, and conventional fan either broke, or it is simply not in the house. In these cases, simple ingenuity comes to the rescue.
