Homemade hand generator for charging a mobile phone. How to make a manual generator to charge a mobile phone. Homemade hand generator to charge your phone

Engineer Igor Beletskiy presents a video review of a Chinese manual charger for a cell phone. Not so long ago, his acquaintance purchased from a small Chinese online store Charger for mobile phone.

Judging by the number of videos on the Russian-language Internet, many have already acquired this “miracle device” and happily demonstrated its capabilities. Still - compact, lightweight, and most importantly not expensive charging and only for a couple of bucks, plus free shipping. And what are the parameters declared by the seller! With a voltage of five and a half volts, the current can reach six hundred amperes! Wow! Who wouldn't be tempted? The Chinese are great masters of hearing. Although if you connect a phone to this charging, twist the handle, then very soon it will light up and show the start of charging. But it seems that few people really tried to charge something with this miracle. Otherwise, there would not have been so many rave reviews. If you look at it, this charger gives out the voltage well. But the battery is charged not with voltage, but with current, which, alas, does not smell here. The maximum that was squeezed out is 50 mA. With this current, you can charge your phone forever. How many Chinese people need to be attracted to get 600 mA, the seller is silent.

Looking inside, the reason for this disgrace becomes clear. A conventional electric motor is used as a generator. It can of course be used as a cheap generator, which is quite Chinese, but with such a small size of the motor, its windings are made with such a thin wire that a current of greater strength simply cannot flow through them. Unless, of course, you spin it at cosmic speed. After which it will simply overheat and burn out.

For the normal operation of this device, it was only necessary to put the motor three or four times more. There are a lot of such electric motors on the radio markets. After dismantling office equipment, they are sold by weight. It would not be so compact, but without deception. Any owner of a Chinese charger, if desired, may well make such a replacement on his own. The design will suffer a little, but the result will be. Now it is quite possible to get a charge current within 0.5 A. It is doubtful that someone will be able to twist this charge for 2-3 hours to fully charge the phone, but for a short-term recharge for an urgent call, it will do quite well.

A normal conventional generator looks much more solid and costs 5-10 times more. They can be found in the Chinese online store. Can i .

Chinese sellers are cunning beasts. This is not to say that the product, the review for which is presented in the video, does not work at all. For example, even a large LED flashlight can be powered with such a charge, because it does not need a large current to operate. But they will have to forget about charging their mobile phones.

Homemade hand generator to charge your phone

Welcome dear friends to our portal Video Teacher. You urgently need to call, but your phone battery is dead, and you find yourself in a place where there is no electricity nearby, watch the video tutorials from the do it yourself heading. In this video tutorial, we would like to present you a video lesson on the topic "Homemade hand generator to charge your phone."

Homemade manual generator, how to make it?

How to make a camping generator for charging a mobile phone from the hand trainer, which is popular today. For the experiment, we took an inexpensive, plastic model. The simulator is arranged very simply, two halves of the body and a rotor. The rotor is the most important and interesting part in this device, it can spin up over 10,000 rpm. On the rotor, along its circumference, you need to install neodymium magnets. You can use the native rotor, but it is better if you make a metal and more massive one.

Now, in order for it to become a full-fledged generator of electricity, you need to add a small inductor to it, literally 150-200 turns of 0.2 wire will be enough and it should be placed strictly above the flying magnets. To do this, we will fix it in the place where the cover is located, the hole cover where the meter is attached. To do this, I made a special metal plug with a core, where I put a small coil, leading the wires out through the side hole. These wires will need to be connected to a separate wire that you run on the load. Continue watch the video ...

Watch the video instruction on creating a homemade hand-held generator on the video training portal, Video Teacher. Enjoy your viewing and success!

Watch a demo video "Homemade Hand Generator"

Watch a video lesson with a more detailed explanation "Homemade hand generator"

In matters of autonomous power supply in the absence of electricity or interruptions in the supply, you can use the so-called alternative sources of electricity. Such as wind farms, hydro, and gasoline-diesel generators. But all of these sources of electricity have their drawbacks. Since they require energy from outside to convert it into electricity.

A wind generator needs a wind that does not blow constantly, but solar panels the sun, which does not come for weeks, especially in winter and in cloudy weather. Generators on internal combustion engines require fuel, which only becomes more expensive, which makes them unprofitable, as well as maintenance, etc., makes them an expensive toy, or an emergency source for a short time.

I want to consider this option. For example, a hand-held generator that operates on human muscle strength. Besides the fact that you have to turn it yourself, it has a number of advantages. It does not depend on weather conditions (wind, sun), it is also mobile, easy to use, and can be used anywhere. The smallest representatives and the most famous are Chinese hand-held dynamo chargers for small electronics. But such small "dynamos" are suitable only for emergency recharging, and it is extremely inconvenient to use them for constant power generation.

Firstly, they give too little energy, and in order to charge a simple phone or a small flashlight they have to be turned for hours. And if electricity is needed every day, then such devices, in the first place, will not withstand and quickly fail from constant loads, since they are made of plastic and are not designed for a long resource. Yes, and it is simply not advisable for a person to twist this contraption for several hours a day for the sake of charging a mobile phone and other electronics, and even after 15 minutes of twisting, his hands get tired from monotonous movements.

The way out would be a larger hand generator to generate a much higher current to charge a large battery. And from this battery to power and charge portable electronics. That is, a large generator can be charged or recharged capacious battery, which for example will be equipped with a car cigarette lighter socket. And after a while, use this energy by connecting various electronics through the cigarette lighter socket.

And when the battery "runs out", charge it again. Such a solution will allow you to constantly use energy and at the same time turn the generator only when the charge in the buffer battery runs out, and a large battery can last for weeks or more. It depends on how to use electricity. I think it is understandable that such a source is only considered to meet the minimum human needs for electricity, such as charging portable electronics, and maximizing the use of a laptop.

For these purposes, for example, such a ready-made version may be suitable. Military hand-held generators, they are just designed to generate electricity in any conditions and in any place. The power of such generators is from 3 watts to 70 watts. There are many models with different characteristics, also more modern counterparts have many outputs adapted not only for charging large batteries, but also for charging portable equipment (USB outputs, 12V, 19V)
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They can also be equipped with any required additional inputs and outputs. The advantage of such large generators in comparison with Chinese "dynamos" is obvious. Such a generator is quite powerful and generates up to 100 watts of energy in a couple of hours, while small generators are only 2-3 watts. This means that they can charge a large battery, for example, as on computer IPBs, and then use energy.

But lead acid batteries do not like fast charging and quickly fail. The optimal charging mode is about 10% of the battery capacity. This I mean that you should not charge lead-acid batteries with an increased current, but how to shorten the charging time if the battery needs to be charged for 10 hours, because you can't twist that much.

There are two outputs here, this is to use lithium-ion batteries, which can be charged with high currents, but now they are capacious lithium ion batteries almost not on free sale. Or new generation NI-HM batteries, which can be charged with high currents up to half the capacity of the batteries themselves. The only thing is to monitor the temperature of the batteries, as they get very hot at high charging currents. And it is necessary to ensure that the temperature does not rise above 70 ° C. Or use large lead acid batteries with a 10% charge.

For example, if you take a military generator, which is in the figure above, and turn it as written in the instructions, that is, 60 rpm, then, depending on the model, it will give a nominal voltage, for example, 50 watts. It turns out that the generator will give about 4A of current, which means if you use a lead-acid battery for charging, then you need a capacity of about 40A. A car is suitable, but less is possible. If you use a small battery, then you need to make sure that the current does not go beyond the design parameters. For example, for a 10-amp battery, the charging current is 1A, but for a short time it is possible up to 2A.

If we consider something really powerful, as a home or camping power plant of high power. Then you can also use an almost ready-made version, such as a bicycle and a bicycle motor-wheel. Now, with the development of electric transport, a large selection of kits for converting bicycles to electric traction has appeared on sale.

A ready-made wheel motor is used as a motor. This wheel-motor is also an excellent low-speed, high-power generator. And it can produce, for example, a 350-watt wheel motor, in generator mode at the same speed it can supply up to 300 watts of energy. Below in the photo is an example of a finished power plant based on a bicycle with a motor-wheel.
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As a basis for such a power plant, you can use either a ready-made bicycle or just a frame with pedals, which can be installed permanently. Also, a motor-wheel is needed without any additional bicycle "attached". And the generator itself is much cheaper than a bike conversion kit. Prices for motor-wheels start at 3500 rubles, but you can find it cheaper, especially with hands. All adaptation to the generator consists in connecting the motor as a generator.

The motor-wheel is a three-phase low-speed permanent magnet motor that generates alternating voltage in generator mode. To rectify, convert current from AC to DC, you need to make the simplest diode rectifier. And also to control the battery charge, you need to connect an ammeter and a voltmeter. Below is an example diagram of connecting the battery for charging.

When using control devices when charging, it is good to navigate. For example, when charging a car battery, you need to keep the current no higher than 6 amperes, although for a short time it is possible up to 10. And the generator itself can produce up to 20A. The voltmeter shows the battery charge level. If the voltage on the brands during charging has risen above 14.5 volts, then the battery has recharged, so also do not lower the battery discharge below 11 volts, this also affects the resource.

In order not to charge a "dead" battery for 10 hours, you can do this. When the battery sits down a little, just recharge it, although it should be done more often, but in time it will be much less, 1-2 hours. When using such a power plant, in the absence of electricity, portable electronics can be charged through the cigarette lighter socket, LED lighting can be connected. And with economical use, it is enough to turn such a shaft generator once a week, since for 1 hour you can generate up to 100 watts of energy.