How to make a network screwdriver from a screwdriver

Method number 2 (reconstruction based on a network unit from a computer)

For this type of reconstruction, only an AT class network unit is suitable. Such devices have a ventilation compartment, as well as buttons on. and off. The network block is used on many models of computers, so it will not be difficult for anyone to find an unnecessary part. Then check the output current, it should be at least 16 volts, and the power 300.30 W.

• Disassemble the device and find the plate on which the wiring is fixed (board).
• Disable protection: locate the green electronic component on the board and attach to any other black wire.
• Find a design with two black, yellow and red wires (MOLEX pins). Attach or solder the extension cord to the yellow and black wires, and attach the other part to the screwdriver terminals. Now twist the mechanism.

Choosing a power supply for a screwdriver

The task can be accomplished in several details. For example, with a laptop charger, this rework is considered simple and unassuming. Therefore, if an unnecessary network block from a laptop is left at home, you can use it. Second detail. network block from a computer. This option implies a certain amount of knowledge and skills to work with a soldering iron. Another option is how to convert a screwdriver to a network one. engage the desired inverter welding. In the next section, we will tell you in detail how to implement your plan in all three ways..

Tip: Pay attention to the device parameters. For effective drilling, the rpm must be at least 1300. For example, the Bosch GSR 1440-LI and Makita DF347DWE machines have this characteristic.

How to convert a cordless screwdriver into a network: 3 basic methods

It is not surprising that almost every house or apartment has a screwdriver. Unfortunately, devices based on a wireless network source often run out of power and break down. Since buying a new battery is expensive, most owners convert their cordless screwdrivers to cordless ones. In this article, we will tell you how to remake the device using the parts at hand. We will also touch on the topic of why this type of equipment breaks down most often. Read carefully!

reconstruction based on laptop power supply

As already mentioned, this reconstruction method is considered simple and does not require much time. Check first what output voltage the device is designed for. The best option would be 12-19 watts. In the next step, remove the unusable batteries from the device with a screwdriver and disassemble the device.

• Disconnect the entry (sized for the laptop connector) and strip the wires.
• Take the contacts and simply solder them to the device.
• Select a location on the device for the wire and drill it. At the end of the action, fold the structure and check for operability.

Why convert a cordless screwdriver to a network?

Battery-charged equipment periodically discharges if it is not used for a long time. This fact is a problem, since the main components deteriorate when the charge in the battery drops frequently. As a result, during the first signs of a breakdown, the battery holds less and less charge. In such a situation, complete breakdown of the part cannot be prevented; it is better to either replace it or change it to a new one. By the way, the cost of the first and second options will be the same.

Tip: If the user is going to work with hard surfaces, choose devices with rotation parameters of at least 20 Nm. This is the Sparky BR2 10.8Li-C HD mechanism..

The second reason is to remake the device. quality of work. Owners of such devices will easily confirm that the torque process is sometimes interrupted. It is also annoying that the power is not the best level. again, the partial discharge is to blame. The situation is saved by connecting the device to the mains supply. Here are the benefits we get in the end:

• Charging time will be shortened and you can start working at any time.
• Functioning without restrictions, confidence that the device does not sit down halfway to the job done.
• Financial benefit: no need to periodically change the battery.

Tip: On high-quality equipment, there is protection against breakages, which is located near the nozzle. Such protection is available for devices Bosch PSR 1200, Bosch GSR 12V-15.

Screwdriver alteration process

(reconstruction based on inverter welding)

Reconstruction of a screwdriver when using inverter welding involves lengthy checks and calculations for the fact that the necessary parts are working. The process of reworking itself is not complicated, it adheres to the same technology as in the previous methods. You just need to remove the old battery, and in its place, attach the cord entry to the contacts. In the case of inverter welding, you will also need to install a secondary coil..

Based on the article read, we can say that this goal can be achieved in different ways. For this, a number of items are used, such as: laptop charger, computer power supply and inverter welding. However, the most successful and uncomplicated reconstruction will be based on a laptop power supply. So, not a huge detail will not weigh down the apparatus and will work for a long time. Be careful, all actions related to electrical devices oblige you to follow safety rules.

See Converting a cordless screwdriver to a mains

How to convert a battery device to a screwdriver from a 220 volt network

Today the screwdriver belongs to the devices that we very often use in everyday life. It is also irreplaceable in production. This device is suitable for a variety of electrical and construction work. With its help, furniture and other items are assembled, the design of which requires threaded connections..

The cordless screwdriver is compact and portable. But not everyone is happy with these advantages, because the device quickly runs out of battery, and you have to interrupt work halfway. Therefore, many owners of this tool are interested in the question of how you can remake a screwdriver with a battery on a network.

The reason for this decision is also the fact that when the device is not used for a long time, the battery is discharged independently, which leads to a breakdown of the screwdriver due to the destruction of some elements. It is impossible to repair a failed battery, and it is not always possible to purchase a new one. Often, component parts can only be purchased from the official representatives of the manufacturer. Accordingly, the cost of a new battery will be almost equal to the cost of a new screwdriver. Therefore, some craftsmen come to the decision to turn the screwdriver into a network.

Materials and tools required for this:

• Charger from this screwdriver;
• His native battery;
• Soft stranded electrical cable;
• Soldering iron and solder;
• Insulating tape;
• Acid.

First, you need to solder the loose ends of the cable to the terminals of the charger. You need to know that copper wires of a cable with brass contacts can be soldered only after they have been treated with acid. Experts recommend using special solder, but sometimes the simplest methods are used in the form of acid treatment..

How to convert a cordless screwdriver to a network: 5 options for solving the issue

Why do you need to remodel a mains-powered screwdriver

In order for you to be able to use a screwdriver even in the most inaccessible places without unnecessary wires, at any time, the mobile screwdriver is converted to a network.

To carry out such a procedure is not so difficult as it seems at first glance. With the appropriate skills and all the necessary components, this process will take a little time..

Methods for converting a cordless screwdriver into a network vary in complexity. One of them – powering the charging from a laptop practically does not require knowledge and skills. To mount a computer power supply, you need to know how to handle a soldering iron, and to repurpose a Chinese adapter, you need to know how to handle a measuring device. In addition, there are several other methods for converting a cordless screwdriver directly into a network.

Namely:

• Using a power supply device from a personal computer instead of a battery;
• Giving new life to the car battery;
• Using, as a source, a power supply from halogen lamps;
• By connecting the Chinese 24V power supply board.

For brainy craftsmen, such manipulations are not difficult. If you are not confident in your abilities, then it is better not to risk it and seek the help of a knowledgeable specialist..

Converting a screwdriver to a network using laptop charging

In the event of a battery failure, a household screwdriver can be switched to mains power by making some changes to its design. This does not require a lot of expenditure of finance, time and effort. The positive nuances of such a transformation are obvious: you do not need to constantly charge the battery, and at the same time, the forced downtime will go away. After all, the shortest duration for charging the device is more than 3 hours..

However, when deciding to perform such a transformation with your screwdriver, you should understand that from now on you will need an alternating current to work with it. You will no longer be able to use it away from communications.

If you need to connect the screwdriver to the network, you can use the charger from an old laptop. It has similar characteristics to a screwdriver, and it can be easily found in every home or workshop. But, nevertheless, check what output voltage is shown for your charging. In this case, chargers for 12-19V are suitable..

Scheme of your actions:

How Its Made 04 Screwdrivers

• We take out unusable batteries from a failed battery pack.
• We take charge from the laptop.
• Cut off the connector and strip the wires from insulation.
• We solder the bare wires or wrap them with electrical tape.
• We make an outlet for the wire in the case.
• Assembling the structure.

This manipulation will allow you to use the screwdriver at any moment, and without stopping for charging..

Convenient screwdriver from the network: features of use

The cordless cordless screwdriver is a great helper in your home. Almost everyone who he has never let down can agree with this. Those who stopped working halfway have a completely different opinion. This tool will help you always and everywhere, but exactly until the time the battery is discharged. Moreover, the quantity in it is limited. In moments of idleness, the battery can also deteriorate. Batteries usually last no more than three years. When this time expires, it has to be changed or sent to the museum of obsolete things. The situation is possible if you convert the screwdriver into a network one. There are enough ways to do this..

The power supply unit of the device provides the function of changing the alternating current with a voltage of 220V. Standard screwdrivers consume a constant current, with a nominal value in the range of 9-18V. In this regard, connection to the network is carried out subject to the use of an electronic transformer. For these purposes, products of the Toshibra and Feron brands are most suitable..

Mains transformers of these brands are of high quality and reliable in operation. In addition, they are quite compact, lightweight, and do not complicate the work with the tool. Their load characteristics are close to those required for a standard screwdriver. In their design there are 2 input and output wires, which makes it possible to supply power to halogen lamps and other types of electricity consumers with a voltage of 12V. However, to use the converted device, you need to adhere to some rules..

Here they are:

• Let the appliance rest for 5 minutes every 20;
• Fix the cable at the elbow with your hand so that it does not interfere with the work;
• Clean the power supply from dust;
• Do not use too many extension cords;
• Do not use the device without grounding;
• It is forbidden to use a converted device for work at height..

Before each start of work with the converted device, make sure that it is working properly..

How to make a screwdriver from the network

When the batteries stop working due to the fact that they have simply outlived their life, many begin to wonder how they can fix the situation and remake their old cordless screwdriver into the network with their own hands. After all, it is no longer possible to repair a battery with a destroyed element, and the cost of a new one is almost equal to the purchase of a new screwdriver. But zealous and skillful owners came up with a way out – to power the screwdriver from the mains. Some were even able to invent a device that works simultaneously from the mains and from the battery. But it’s better not to do it.

Why do you need to remodel a mains-powered screwdriver

In order for you to be able to use a screwdriver even in the most inaccessible places without unnecessary wires, at any time, the mobile screwdriver is converted to a network.

To carry out such a procedure is not so difficult as it seems at first glance. With the appropriate skills and all the necessary components, this process will take a little time..

It is difficult to remake a cordless screwdriver, so you can ask a professional for help

Methods for converting a cordless screwdriver into a network vary in complexity. One of them – powering the charging from a laptop practically does not require knowledge and skills. To mount a computer power supply, you need to know how to handle a soldering iron, and to repurpose a Chinese adapter, you need to know how to handle a measuring device. In addition, there are several other methods for converting a cordless screwdriver directly into a network.

Namely:

• Using a power supply device from a personal computer instead of a battery;
• Giving new life to the car battery;
• Using, as a source, a power supply from halogen lamps;
• By connecting the Chinese 24V power supply board.

For brainy craftsmen, such manipulations are not difficult. If you are not confident in your abilities, then it is better not to risk it and seek the help of a knowledgeable specialist..

Convenient screwdriver from the network: features of use

The cordless cordless screwdriver is a great companion in your home. Almost everyone who he has never let down can agree with this. Those who stopped working halfway have a completely different opinion. This tool will help you always and everywhere, but exactly until the time the battery is discharged. Moreover, the quantity in it is limited. In moments of idleness, the battery can also deteriorate. Batteries typically last no more than three years. When this time expires, it has to be changed or sent to the museum of obsolete things. The situation is possible if you convert the screwdriver into a network one. There are enough ways to do this..

The power supply unit of the device provides the function of changing the alternating current with a voltage of 220V. Standard screwdrivers consume a constant current, with a nominal value in the range of 9-18V. In this regard, connection to the network is carried out subject to the use of an electronic transformer. For these purposes, products of the Toshibra and Feron brands are most suitable..

In order for the screwdriver to be comfortable and practical, it must be carefully looked after.

Mains transformers of these brands are of high quality and reliable in operation. In addition, they are quite compact, lightweight, and do not complicate the work with the tool. Their load characteristics are close to those required for a standard screwdriver. In their design there are 2 input and output wires, which allows you to supply power to halogen lamps and other types of electricity consumers with a voltage of 12V. However, to use the converted device, you need to adhere to some rules..

Here they are:

• Let the appliance rest for 5 minutes every 20;
• Fix the cable at the elbow with your hand so that it does not interfere with the work;
• Clean the power supply from dust;
• Do not use too many extension cords;
• Do not use the device without grounding;
• It is forbidden to use a converted device for work at height..

Before each start of work with the converted device, make sure it is working properly..

• How to convert a battery device to a screwdriver from a 220 volt network
• Why do you need to remodel a mains-powered screwdriver
• Converting a screwdriver to a network using laptop charging
• Convenient screwdriver from the network: features of use
• How to make a screwdriver from the network

How to convert a battery device to a screwdriver from a 220 volt network

Today the screwdriver belongs to the devices that we very often use in everyday life. It is also irreplaceable in production. This device is suitable for a variety of electrical and construction work. With its help, furniture and other items are assembled, the design of which requires threaded connections..

The cordless screwdriver is compact and portable. But not everyone is happy with these advantages, because the device quickly runs out of battery, and you have to interrupt work halfway. Therefore, many owners of this tool are interested in the question of how you can remake a screwdriver with a battery on a network.

In order to convert the battery device to a cordless screwdriver, it is necessary to prepare materials and tools for work in advance.

The reason for this decision is also the fact that when the device is not used for a long time, the battery is discharged independently, which leads to a breakdown of the screwdriver due to the destruction of some elements. It is impossible to repair a failed battery, and it is not always possible to purchase a new one. Often, component parts can only be purchased from the official representatives of the manufacturer. Accordingly, the cost of a new battery will be almost equal to the cost of a new screwdriver. Therefore, some craftsmen come to the decision to turn the screwdriver into a network.

Materials and tools required for this:

• Charger from this screwdriver;
• His native battery;
• Soft stranded electrical cable;
• Soldering iron and solder;
• Insulating tape;
• Acid.

First, you need to solder the loose ends of the cable to the terminals of the charger. You need to know that copper wires of a cable with brass contacts can be soldered only after they have been treated with acid. Experts recommend using special solder, but sometimes the simplest methods are used in the form of acid treatment..

Converting a screwdriver to a network using laptop charging

In the event of a battery failure, a household screwdriver can be switched to mains power by making some changes to its design. This does not require a lot of expenditure of finance, time and effort. The positive nuances of such a transformation are obvious: you do not need to constantly charge the battery, and at the same time, the forced downtime will go away. After all, the shortest duration for charging the device is more than 3 hours..

However, when deciding to perform such a transformation with your screwdriver, you should understand that from now on you will need an alternating current to work with it. You will no longer be able to use it away from communications.

If you need to connect the screwdriver to the network, you can use the charger from an old laptop. It has similar characteristics to a screwdriver, and it can be easily found in every home or workshop. But, nevertheless, check what output voltage is shown for your charging. In this case, chargers for 12-19V are suitable..

Using a laptop charger, you can convert a screwdriver to a network

Scheme of your actions:

• We take out unusable batteries from a failed battery pack.
• We take charge from the laptop.
• Cut off the connector and strip the wires from insulation.
• We solder the bare wires or wrap them with electrical tape.
• We make an outlet for the wire in the case.
• Assembling the structure.

This manipulation will allow you to use the screwdriver at any moment, and without stopping for charging..

How to convert a cordless screwdriver to a network: powered from a 220 volt network, DIY alteration

You can extend the life of a cordless screwdriver if you convert it to a network one. Those who have used a cordless screwdriver at least once could not help but appreciate its convenience. Without getting tangled in the wires, at any time you can penetrate the device into hard-to-reach niches, bring it to the country house, or take it out into the street and patch up the playground. But all the advantages of such a device are good until the battery is discharged..

How to convert a cordless screwdriver to a network: powered from a 220 volt network, DIY alteration

Home »How to convert a cordless screwdriver to the mains: powered from a 220 volt network, DIY alteration

How to make a screwdriver from the network

When the batteries stop working due to the fact that they have simply outlived their life, many begin to wonder how they can fix the situation and remake their old cordless screwdriver into the network with their own hands. After all, it is no longer possible to repair a battery with a destroyed element, and the cost of a new one is almost equal to the purchase of a new screwdriver. But zealous and skillful owners came up with a way out – to power the screwdriver from the mains. Some were even able to invent a device that works simultaneously from the mains and from the battery. But it’s better not to do it.

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Welding inverter

To convert the old design into a power supply, some improvement needs to be done, namely the addition of a secondary coil.
The dignity of the inverter, when compared with the laptop’s battery, is immediately noticeable. The design makes it possible to obtain the required voltage and current at the output. The method is good for those who are versed in radio engineering.

How to make a power supply for a 12v and 18v screwdriver yourself

An experienced master in the field of construction always has his irreplaceable tool at hand – a screwdriver. This is explained by the fact that this device is multifunctional and greatly facilitates the work, which cannot be said about screwing in screws with a screwdriver. However, over time, any technique, including a cordless screwdriver, loses its effectiveness during work and no longer works as before. What to do and what to do if you are faced with such a problem? Of course, you can buy a new battery, but we are not looking for easy ways, and the price of a new battery “bites”, so we offer the following alternative. One of the ways out of this situation is to design a homemade power supply for the instrument..

Preliminary work

Before you start remodeling the device, you need to select the correct size AC adapter for the screwdriver so that it fits into the battery case.

In addition, you need to remove everything in the middle, and measure the internal space, the sizes of the internal and external contents differ from each other..

Next, you should examine the markings or design on the body of the working tool to determine the supply voltage. If the indicator is different from 12v, the search for a substitute device continues. Then it is necessary to calculate the current consumption of the screwdriver, such parameters are not indicated by the manufacturer. To do this, you need to know the power.

In order to exclude any calculations, you can also pick up the power supply by eye. During the purchase process, in addition to the “charging” current, ask about the battery capacity. Take, for example, a capacity of 1.2 Amperes, and charging is 2.5, then the resulting current should fluctuate approximately between these values. Before finding the missing power supply, it is recommended to display the following on paper:

• Dimensions (edit)
• Minimum current
• Required supply voltage

Screwdriver battery wiring diagram

The sequence of actions in the presence of the required block:

• After you find the optimal power supply and check it for similarities with the declared characteristics, the screwdriver is disassembled, and the old drive is removed. If the body is glued, you can tap a little around the seam with a hammer. Or take a thin knife, placing it on the seam with a tip, gently knock with a hammer. The problem will be solved.
• The cord, as well as the leads from the plug are separated by means of a soldering iron.
• The place previously occupied by the power supply of the cordless screwdriver contains the other contents of the case.
• The cord, connected to the mains, comes out through the opening in the case, then it is connected to the power supply with a soldering iron.
• Soldering again combines the output of the power supply together with the battery terminals. An important rule is the observance of the polarity.
• The power supply is connected to the device, after which testing takes place.
• If the dimensions of the new unit exceed the previous one, it is possible to embed it in the middle of the screwdriver handle.
• A diode of the required power is installed with a parallel supply output from the inside of the wire break “” between the battery socket, including its output, but with the “-” pole towards the engine. This is done so that voltage does not flow from the mains to the battery..

List of materials and working tools

Transforming a cordless screwdriver into a network one is quite easy and informative. If you have the necessary skills and all the components, it will take a little time. It will be useful for you:

• charger from a screwdriver;
• outdated (“factory”) battery;
• soft electrical cable (stranded);
• soldering iron, solder;
• acid;
• insulation tape.

Car battery

The battery can be an excellent option for connecting a screwdriver, especially when it comes to work away from the mains. To implement the plan, you need to disconnect the clamps from the working tool and power it to the “battery”. Warning! It is not recommended to use the source in continuous mode!

Using a power supply from an old laptop

A laptop battery is quite suitable for introducing a power supply for a screwdriver.

• The screwdriver body is completely disassembled. The old source is removed, the wiring is disassembled with a soldering iron.
• Connecting the wiring of the new unit to the wiring of the old one that held the previous one. Observe polarity!
• After activating the “start” button, check the performance of the screwdriver, as well as the correct connection.

• The screwdriver body is provided with a hole where the plug with a charging connector is placed. Now the tool not only works from 220V, but also recharges like a laptop (computer).
• The new power supply is installed in the middle with glue.
• Other body elements are put back into place. That’s all, you can get to work!

Modification methods

Benefits of the upgrade

The transformation of a cordless tool into a device that works continuously from the mains has the following advantages:

• There is no need to recharge the device completely, reducing downtime during long work.
• Provides constant amperage so that the torque remains constant.
• The screwdriver can not be used for a long time, its technical parameters do not deteriorate.

The only drawback of improving the device is the presence of an electrical outlet near the work being performed. This problem can be easily solved by connecting an extension cord..

Soldering and packaging

We begin to collect what we have prepared.

• We put the soldering iron to warm up, but for now we put a wire from the power supply into the hole in the battery case. In the photo, I additionally put one of the cans so that it supports the wire and does not let it sag, and for the company – improves the balance of the case;
• We install the jar approximately in the place where it will stand, and try on the wires. After trying on in a comfortable position (the wire can be pulled through the body further), we start soldering. Do not forget that the current is constant, and you should check the polarity before connecting the wires;
• We solder both wires and insulate the soldering points with electrical tape;
• We install the jar with the terminal in its place, place the wires inside so that you can assemble the body completely;
• We drive the cut off piece of the plug wafer into the hole in the battery case to fix the wire in it;
• Assembling the battery case.

By the way, before soldering, you can check the performance of the entire system. For example, I clamped the wires with ordinary clothespins (after all, it is household work, not DIY in a ready-made workshop) and connected the upper part of the battery case to a screwdriver.

This concludes our work, you can check the product and boast to everyone what a good cordless screwdriver turned out to be from a cordless.

Do-it-yourself conversion of a cordless screwdriver into a network

My own experience: with our own hands we are converting a cordless screwdriver into a network screwdriver. With a minimum of tools, knowledge and almost free. We use the power supply from an old laptop.

Preparing the power supply

The first step is to prepare the power supply from the laptop. All preparation is to remove the plug that fits the laptop and prepare the wires for soldering.

• We cut off the plug, but do not throw it away – it has a soft plastic wafer on it, which will still be useful to us.
• Use a knife to clean the outer insulation

5 centimeters of wire;

For the most part, these cables look like when one wire in the form of a “wafer” covers the inner one with hairs. This “external” wire is carefully separated and twisted, turning it into a normal one;

It is not a sin to isolate such a structure – electrical tape comes into play.

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After insulating the wires, the preparation of the power supply is completed, we proceed to the battery.

Battery preparation

A little more work with the battery.

• We remove from the screwdriver, untwist the case;
• We remove all mechanical parts. We see the battery banks held together (hello to the Chinese) with scotch tape. We take out the cans from the battery;
• We bite off two contacts and remove the top jar on which the battery terminal is held – then we will perform all operations with it, and leave the rest of the block of cans as ballast. One wire is already soldered to the terminal, add a second one and wrap it with electrical tape for reliability;
• Preparing the case: we drill a hole in it with a radius slightly smaller than the available wafer from the cut off plug on the power supply.

This completes the preparations. We have:

• Battery case with hole;
• Battery bank with a terminal and two outgoing wires from it;
• Power supply cable with stopper wafer and two insulated wires.

It’s time to collect.

Preparation, materials and tools

My version of the alteration is quite simple, because the tools and materials required a minimum.

• Cutter or knife;
• Pliers;
• Soldering iron.

I will make a reservation that the alteration is quite household / handicraft, and real masters will use a soldering station here, a crimp for stripping and other devices, but the manipulations performed in the kitchen are quite worthy of an elementary home tool..

• Electrical tape – where without it;
• Wire – for such a current, 0.5 mm 2 is enough;
• A drop of solder (if you solder at all, you can clamp it).

Before starting work, I insulated my place – I laid it with newspapers so as not to make the living room and used a wooden backing for safe soldering.

Alteration of the cordless screwdriver

Actually, to rework.

Since I had a completely finished power supply unit with a sufficient wire length (1.8 meters), I decided not to build it up and not try to transfer the unit to the battery case, as I originally planned. I didn’t want to worsen the good weight distribution of the PRORAB either, so I decided to leave the battery as it is, simply by putting a wired power supply into it. It turned out as well as possible:

• Power supply for the screwdriver;
• Excellent balancing – with a heavy bottom;
• The ability to disconnect the “mains” battery and connect a fresh.

Perhaps the creation of such a “network” battery is a promising idea in more industrial volumes, as a reserve for a set of cordless tools.

Next, I turn my story from a record of how I prepared myself into an instruction for people who are just planning to turn their cordless screwdriver into a network.

Background

A long time ago, moving to a new apartment, I will receive a so-called “household screwdriver” under the brand name PRORAB 1112 B1N. This is a simple Chinese device, hundreds of types of which are sold in our construction and not very supermarkets. He played his role in the move – he was also a mixer, and was used to assemble furniture and tighten screws on thresholds, after which he was undeservedly forgotten. In use, I got the commonly used Hitachi DS12DVF3, and PRORAB, along with its Chinese battery, was forgotten on the loggia.

Three years of storage on a freezing loggia did not spare the banks, and after finding a shura during spring cleaning, it was no longer possible to use it – there was enough strength for a couple of self-tapping screws. At the same time, there was work for the auxiliary screwdriver / drill – during the manufacture of household furniture it is very annoying to change the equipment.

So I came up with the idea of ​​turning an old cordless screwdriver into a network one. This had to be done, of course, with his own hands – a new foreman costs 1,500 rubles, a replaceable battery for him – 1,200 rubles. The choice of an economical owner, as they say, is obvious – we redo it with our own hands in a network.

Power supply and some theory

Forums and search on the Internet prompted me the standard fate of a person who decided to make a network screwdriver with his own hands from a cordless one – this is a long study of the theoretical part (in the absence of specialized or even technical education, as was the case with me), a quick search for the necessary switching power supplies , understanding that you have to spend a couple of thousand rubles, and the choice in favor of buying a new screwdriver for replacement.

Indeed, let’s look at the theory. My PRORAB was powered by a 12V battery, the markings on its engine said the same. The manufacturer, according to tradition, does not indicate the power of the device, since the figures are not very impressive against the background of wired counterparts. Therefore, it was necessary to estimate with what parameters the power supply for the screwdriver would be needed.

Measurement of the consumption of the motor at failure showed that it would take about 100 VA in order to show the maximum performance. Approximately the same parameters were advised by gurus on the forums for 12 N / m of torque – to take a pulse generator at 8-10A. The cost of such a block comes out to 1000 rubles. plus wires, a plug and other strapping, which is also a bit too much.

The solution was found quite simple – if you don’t have your own power supply, then it will definitely be at work. Moreover, in almost any company – after all, there is an IT department everywhere, which, most likely, maintains and repairs employees’ laptops. I went there. In the rubble of electronics “for release” there was a bunch of power supplies with a variety of parameters. There were no 12V outputs, and in the end I settled on a unit from a Toshiba laptop with an output parameter of 15V / 5A, or 75VA, which is quite suitable for me. An interesting option was Sony with 19V, but I didn’t want to strain the Chinese so seriously.

Screwdriver battery design

The battery device does not depend on the brand. In all devices, the design of the batteries is similar and differs in appearance, body and contacts..

The body contains several elements connected in series. Their number depends on the voltage of each cell and the battery as a whole. When using the most common nickel-cadmium cells with a voltage of 1.2V, 10 pcs are needed to power a 12V device. Battery capacity is indicated in ampere-hours.

Interesting. With a series connection, the output voltage rises, but the capacitance does not change and is equal to the capacitance of individual elements.

Battery cell types

These devices use elements of different types and voltages, each of which has its own advantages and disadvantages..

The most common – nickel-cadmium (Ni – Cd) voltage 1.2V.

Advantages:

• low price;
• stored in a discharged state.

Disadvantages:

• have a memory effect;
• high self-discharge;
• small capacity;
• low number of charge / discharge cycles.

More advanced 1.2V nickel metal hydride (Ni-MH).

Advantages:

• lower memory effect and self-discharge;
• large capacity and number of charge / discharge cycles.

Disadvantages:

• higher price;
• poorly tolerate low temperatures and storage in a discharged state.

The most advanced 3.6V lithium-ion (Li-Ion).

Advantages:

• lack of memory effect;
• very low self-discharge current;
• high specific capacity, allowing to reduce the weight and dimensions of the device;
• the number of charge / discharge cycles many times higher than other types of batteries.

Disadvantages:

• high price;
• loss of capacity three years after manufacture.

Computer power supply

The easiest and cheapest option is to use a power supply from an old computer with a power of at least 300W and a current of 15A.

In the old blocks there was a switch, in modern ones – to turn it on, you need to close the wires going to the device. The color of these wires depends on the model. This can be found on the Internet or by the selection method.

The 12V output is in a four-pin connector: black “-”, yellow “”.

Such devices have a built-in fan, therefore, when making a case for it, it is necessary to make holes or install it with a fan outside. It’s best to just hide the extra wires inside the case..

Important! A 14.4 or 18 volt screwdriver will operate at reduced power.

Using an external power supply

The external power supply device has larger dimensions than the built-in one, but in any case, if you power the screwdriver from the mains, the tool will be “tied” with a wire to the outlet.

The current coming from the power supply reaches 10-15A, so the cable cross-section must be at least 1mm².

Interesting. The screwdriver can be powered from an old car battery or from a car through the cigarette lighter socket.

Built-in power supply in the battery case

If there is a desire, time and “straight” hands, the unit can be placed in the battery case. For this, a ready-made device with the appropriate parameters is purchased, removed from its case and mounted in the battery case. The leads are soldered with a wire with a cross section of at least 1mm² to the battery terminals, and the power cord is changed to a longer one.

Important! If there were ventilation holes in the power supply case, then it is necessary to make the same in the new design.

Assembling a serviceable battery from two that have lost capacity

Two faulty devices can be assembled into one serviceable.

Important! By connecting the power supply unit to the case of the defective battery, the second repaired one will provide mobility when performing small amounts of work.

Screwdriver device

This mechanism consists of the following parts:

• DC electric motor. It has the shape of a cylinder; instead of the field winding, there are permanent magnets in the housing. This simplifies the design and provides sufficient torque at low revs. The drive (sun) gear of the planetary reducer is put on the electric motor shaft;
• Reversible speed controller. The adjustment circuit is assembled on a PWM controller and a field-effect transistor. The reverse is carried out by switching the polarity of the power supply to the motor brushes;
• Planetary reductor. Made in a separate building. It got its name from its similarity to the solar system. Consists of a ring gear, a central (sun) gear, satellites and a carrier. The ring gear transmits the force through the spring loaded load regulator balls. There are models with two-speed gearboxes. The increased speed is enabled when using the device as a drill;
• Rotary force limiting mechanism. Serves to limit the force when tightening screws. Transmits torque through balls pressed by an adjustable spring;
• Removable battery. Consists of separate elements in one body. The voltage in different models is from 9 to 18 volts.

DIY screwdriver alteration

Consider the option with a remote power supply.

We build in a ready-made power supply

To do this, you need to purchase a ready-made block with suitable characteristics and dimensions. There is enough such good on the radio markets.

Take the body with you and go to the fitting. When the desired power source is purchased, carefully separate it from the case.

We place the screwdriver in the battery box. All components must be securely fastened.

If necessary, extend the wires connecting the control board and the transformer. If the circuit touches the metal parts of the transformer during operation, a short circuit will occur.

Since the space in the case allows – separate the board and the transformer for better cooling. Whichever quality power supply you choose, the load will be high and overheating is possible.

It will not be superfluous to fix additional radiators on the power control microcircuits. Operate the screwdriver for a long time, disconnect it from the mains and touch the radio parts on the control board.

You yourself will understand which elements need heat dissipation. Holes can be made in the housing for air circulation.

Redesigning the power supply unit with your own hands will not take much time, and the cost of the purchased module is incomparable with restoring the battery’s performance.

Using a power supply from a personal computer

On the radio market for a small cost, you can purchase an old power supply from a personal computer. We need a version of the “AT” format, which had to be turned off with the key after exiting the operating system.

Experienced users remember such system blocks. The advantage of such a power supply is also that it indicates an honest power. If it says 300W, then you can safely remove 15-16 amperes from the 12-volt output (again referring to Ohm’s law). This is enough to power an average screwdriver..

Such blocks have a power button in the kit. Another advantage is the presence of a cooling fan and an advanced overload protection system.

If you will hide the power supply in a beautiful case, do not forget to leave a hole for ventilation..

The connection is very simple. Black wire (-), yellow wire (12V).

Limitations – a screwdriver with a supply voltage higher than 14 volts will not work.

Making a homemade power supply

If you are familiar with the principles of building electrical circuits, you can make your own power supply. Scheme giving general concepts – in the illustration.

The transformer can be picked up from an old tube TV, or other household appliances. Power for 220 volts 250-350W. The main thing is the power supply – the donor should not be pulsed.

The voltage on the secondary winding is 24-30 volts. The secondary winding is made from a wire of the corresponding section.

However, if the output winding current is at least 15 amperes (see transformer specification), there is nothing to worry about.

After losses on the diode bridge (1-1.5 V on the diode), you will get the required output value.

If you have an electrical engineering education, make the calculation yourself. Or in a practical way: by connecting a 220 volt 100W incandescent lamp as a load, measure the output voltage. E

If it exceeds the needs of the screwdriver, reduce the number of turns of the secondary winding of the transformer.

AC adapter for screwdriver in battery housing

If your tool is not too powerful, you can place the power supply in the handle or case from damaged batteries.

Battery case power supply

Mobility is preserved, you are limited only by the length of the network cable. The only problem is how to squeeze a sufficiently powerful transformer into a small case..

We recall Ohm’s law again, and we understand that a powerful 220 volt electric motor can be compact.

There is a way out – reworking the screwdriver in the network

Yes, it loses one of the benefits of a cordless tool – mobility. But for work in rooms with access to a 220 volt network, this is an excellent way out. Especially since you give new life to a broken instrument.

There are two concepts of how to make a network out of a cordless screwdriver:

Battery Disadvantages

• Needs regular recharging. Sooner or later, batteries will run out of charge cycles..
• The cheaper the tool, the faster the rework time will come..

There is nothing wrong with that, but you should be aware that the manufacturer saves as much as you do. Consequently, the most expensive unit (and this is the battery) will be the cheapest when bundled..

As a result, we get an excellent tool with a serviceable motor and not a worn gearbox, which does not work due to a poor-quality battery..

There is an option to purchase a new set of batteries, or replace faulty batteries in the unit. However, this is a budget event. The cost is comparable to buying a new screwdriver.

The second option is to use a spare or old battery from the car (if you have one). But the starter battery is heavy, and the use of such a tandem is not very comfortable..