7 ideas to build a homemade windmill

For a long time, mankind has been using wind power for its own purposes. Windmills, sailing ships are familiar to many, they are written about in books and historical films. Nowadays, a wind generator has not lost its relevance, because with it, you can get free electricity in the country, which can come in handy if the lights are turned off. Let's talk about homemade windmills that can be assembled from improvised materials and available parts with a minimum of cost. For you, we have provided one detailed instruction with pictures, as well as video ideas for several more assembly options. So, let's look at how to make a wind generator with your own hands at home.

Assembly instruction

There are several types of wind turbines, namely horizontal, vertical and turbine. They have fundamental differences, their pros and cons. However, the principle of operation of all wind generators is the same - wind energy is converted into electrical energy and accumulated in batteries, and already with them goes to human needs. The most common view is horizontal.

Horizontal model

He is familiar and recognizable. The advantage of a horizontal wind generator is a higher efficiency compared to others, since the blades of a wind turbine are always under the influence of air flow. The disadvantages include the high wind requirement - it should be stronger than 5 meters per second. This type of windmill is the easiest to make, so it is often taken as a basis by home masters.

If you decide to try your hand at assembling a wind generator with your own hands, here are a few recommendations.

You need to start with the generator - this is the heart of the system, the design of the screw assembly will depend on its parameters. For this, car generators of domestic and foreign production are suitable, there is information about the use of stepper motors from printers or other office equipment. A bicycle motor wheel can also be used to make a windmill for electricity itself. In general, almost any motor or generator can do, but it must be checked for effectiveness.

Generator Examples

Having decided on the energy converter, you need to assemble the gear unit to increase the speed on the generator shaft. One revolution of the propeller should be equal to 4-5 revolutions on the shaft of the generator unit. However, these parameters are selected individually, based on the power and characteristics of your generator and blade unit. A part from a grinder or a system of belts and rollers can act as a reducer.

Important knot of a windmill

When the gear-generator assembly is assembled, they begin to find out its resistance to torque (grams per millimeter). To do this, make a shoulder with a counterweight on the shaft of the future installation, and with the help of the load, find out at what weight the shoulder will go down. An acceptable result is considered less than 200 grams per meter. The shoulder size in this case is taken as the length of the blade.

Many people think that the more blades, the better.This is not entirely true. We need large revolutions, and many screws create greater resistance to wind, since we manufacture them at home, as a result of which, at some point, the incoming flow slows down the screw and the efficiency of the installation falls. You can use a two-blade propeller. Such a propeller with a normal wind can spin more than 1000 revolutions per minute. You can make the blades of a homemade wind generator from improvised means - from plywood and galvanizing, to plastic from water pipes (as in the photo below). The main condition is that the material must be light and durable.

What to make blades

A lightweight screw will increase wind turbine efficiency and airflow sensitivity. Do not forget to balance the air wheel and remove irregularities, otherwise, during the operation of the generator, you will listen to howling and howling, and vibrations will lead to quick wear of parts.

Balanced blades

The next important element is the tail. He will keep the wheel in a stream of wind, and rotate the structure in case of a change in its direction.


Whether or not to make a current collector is up to you. This will complicate the design, but will save you from frequent twisting of the wire, which is fraught with cable breaks. Of course, in its absence, you will sometimes have to unwind the wire yourself. During the trial run of the wind generator, do not forget about safety measures, spinning blades pose a great danger.

A tuned and balanced windmill is installed on the mast, not less than 7 meters high from the ground, fixed with expansion cables. Further, an equally important node is the storage battery. The most commonly used car acid battery. You can’t connect the output of a homemade wind generator directly to the battery, you need to do this through a charging relay or a controller that you can assemble yourself or purchase one ready.

Windmill assembly diagram

The principle of operation of the relay is reduced to control charge and load. In the case of a full battery charge, it switches the generator and the battery to load ballast, the system tends to always be charged, avoiding overcharging, and does not leave the generator without load. A wind turbine without load can spin up quite a lot and damage the insulation potential in the windings by the developed potential. In addition, high revolutions can cause mechanical destruction of the elements of the wind generator. Next is a voltage converter from 12 to 220 volts 50 Hz for connecting household appliances.

Wiring diagram

Now the Internet is full of diagrams and drawings, where the masters show how to make a wind generator with powerful magnets yourself. Whether they are as effective as promised is a moot point. But it’s worth trying to assemble a wind power generating installation for the house, and then decide how to improve it. It is important to gain experience and then you can already swipe at a more serious device. The freedom and variety of makeshift windmills is so vast, and the elemental base is diverse that it makes no sense to describe them all, the basic meaning remains the same - the wind flow untwists the screw, the gearbox increases the shaft speed, the generator generates voltage, then the controller keeps the charge level on the battery, and with he is already taking energy for various needs. Here on this principle, you can make a wind generator with your own hands at home. We hope our detailed instructions with photo examples have explained to you how to make a suitable model of a windmill for your home or summer house. We also recommend that you familiarize yourself with master classes on assembling a home-made device in video format.

Visual tutorials

To easily make a wind generator for generating electricity at home, we recommend that you familiarize yourself with ready-made ideas in video examples:

So we have provided all the most simple and affordable ideas for assembling a makeshift windmill. As you can see, even a child can easily make some models of devices. There are many other options for homemade products: on powerful magnets, with complex blades, etc.These constructions should be repeated only if there is some experience in this matter, you should start with simple schemes. If you want to make a wind generator so that it works and is used for its intended purpose, proceed according to the instructions provided by us. If you have any questions, leave them in the comments.

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One comment

  • urmonjon

    I also wanted to make the same wind generator; I can’t; car generator suitable or cooling fan

    To answer

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