How to connect an electric screwdriver to the battery charger

Can an electric screwdriver be powered by the battery charger

Electric screwdriver is convenient for its ubiquity. independence from the limiting wires makes it possible to get into hard to reach areas. A set of two power modules allows you to power one while working with the other. However, each battery pack has a finite number of charge/discharge periods, failing once they are used up. In low-cost tools, blocks break faster, and the user gets a gadget with a functioning motor, but no power. Then there is the dilemma of “can you connect an electric screwdriver directly to the charger”.

You can feed such an electric screwdriver by connecting it to the network through the power supply node, because its motor runs at 220 volts.

How to connect to the charging station

Before you decide the question “whether you can charge the battery of an electric screwdriver with a charger,” you must remember that the charger unit of an electric screwdriver supplies a low voltage, with a long wire voltage is lost, so it is rational to connect through a meter cord with a section of 2.5 mm2 and larger.

• To the contacts of the charging node of an electric screwdriver, wires are attached. Spoiled power elements are removed from the socket.
• A slot is cut into the housing and the cable is fed through. It is suggested to seal the entry point with elastic material so that there is no backlash and the wire is held firmly in place.
• After you have removed the defective cells and have lost weight from the socket, it is advisable to restore the balance by putting some weight onto the empty space. Otherwise the hand will get very tired while working, which can damage the joints and ligaments over time.
• The cable and the previously attached wires are connected together, the housing is assembled.

How to connect to the charging station

Before you decide the question “whether you can charge the battery of an electric screwdriver with a charger,” you must remember that the charger unit of an electric screwdriver supplies a low voltage, with a long wire voltage is lost, so it is rational to connect through a meter cord with a section of 2.5 mm2 or more.

• Wires are attached to the terminals of the electric screwdriver’s charging node. Spoiled power cells are removed from the socket.
• A groove is made in the case and the cable is led through it. It is suggested to seal the entry point with the elastic material so that there is no play and the wire is held firmly in place.
• After removing the unsuitable elements the socket must be unbalanced by placing some weight on the empty space, otherwise the hand will get very tired while working, which can eventually harm the joints and ligaments.
• Connect the cable and the wires attached earlier, assemble the case.

Other ways to supply power

Unit inside

The solution of the problem “whether it is possible to connect an electric screwdriver through a charger” can become an alternative option of powering an electric screwdriver. the installation of a power supply unit in the empty housing of the power tool.

Before you begin, it is necessary to prevent overheating of the block, so the housing must be made with holes, which will provide air movement, heat exhaustion. Continuous work time with an electric screwdriver with this improvement is advisable to reduce to 15 minutes.

You buy a ready-made unit, it is selected by the size of the body, the technical indicators. The pulse version of the module is the most suitable for use, it is small-sized, lightweight. The use of modules of domestic production of the last century is not recommended. they have a large volume at a low efficiency.

Unsuitable batteries are removed from the bed, and the power supply unit is placed in their place. The contacts are energized, and the housing is closed. The assembled hybrid gadget is ready to work from the network.

• Wires can be lengthened for convenience.
• It is necessary to monitor the quality of the assembly: the design should not be able to touch the metal elements, otherwise the short circuit will not avoid. It is best to leave some space between the transformer and the board, which will have a positive effect on cooling.
• If any parts of the structure are very warm, you can install heat-removing modules or make ventilation slots.

By their own efforts

For users with special knowledge, skills, will not be difficult problem “whether you can power the electric screwdriver from the charger without special tools”, t.к. Assembly of the power supply unit is possible with your own hands. The power module assembled according to the circuit is inserted into the housing instead of the damaged elements. The outgoing voltage is measured, the leads are powered and the housing is locked.

Tip: The scheme may require additional load, it can be provided by the inclusion of a 15W light bulb, which will also provide backlighting.

The computer module will also do

Another solution to the problem of powering an electric screwdriver is to mount it to a computer power supply. This option applies to such modules, which are equipped with a mechanical lever. The positive aspect is that the unit is cooled by a cooler and protected from exaggerated loads by a built-in special system.

To arrange such an assembly only using power modules for 300-350 W and current of 12 volts, not less than 16 A. For tools with a voltage greater than 14 volts this power supply option does not work.

The user may want to hide an unaesthetic unit in a beautiful case, and then it is recommended not to forget to arrange ventilation in it.

Car Charger

In looking for a solution to the question “whether you can connect an electric screwdriver to the charger,” you can stop at charging car AK-block. Modules with manually adjustable current, voltage. Connection is not complicated at all. it’s enough to connect input channels of the tool motor with contacts of the car charger.

General recommendations

All of the above methods have one thing in common. disassembly of the power module housing. If the frame is fixed on bolts, it is not a difficulty, fixing it on glue requires careful opening of the seam by tapping on the gap with a hammer, plunging a knife into it.

When installing, observe the direction of voltage. it must not apply to the battery. Therefore the module is mounted in parallel with the power contacts, in the plus line is built in a diode illuminator for a certain power.

Summary: The question “can an electric screwdriver work from the charger” has a positive answer, and several solutions, but requires caution, some scientific knowledge and dexterity.

electric screwdriver with an autonomous power supply, is clearly one of the best inventions of mankind, and it greatly facilitates the life of almost all mu.

Indispensable household helper. cordless screwdriver. the tool will be with you everywhere, but it works exactly until the battery runs out, but the number of charge cycles it has is limited, even from idleness, the battery can go bad. Batteries live about three years, and after that time you will have to replace it. You can save the tool, if you convert it from cordless to cordless, and there are different ways of such conversion.

Other ways of powering up

The unit inside

The solution of the problem “whether it is possible to connect an electric screwdriver through a battery charger” can become an alternative option of powering an electric screwdriver. installation of a power supply unit in the empty housing of the power supply unit of the tool.

Before you begin, it is necessary to prevent overheating of the block, for which you must arrange in advance the holes in the housing, which will provide air movement, heat removal. Continuous work time with an electric screwdriver with this improvement is advisable to reduce to 15 minutes.

A ready-made unit is purchased, it is selected according to the size of the body, technical indicators. The pulse version of the module is most suitable for use, it is small-sized, lightweight. It is not recommended the use of modules of domestic production of the last century. they have a large volume at low efficiency.

Unsuitable batteries are removed from the bed, and the power supply unit is put in their place. Contacts are energized, the housing is closed. The assembled hybrid gadget is ready to work from the mains.

• The wires can be extended for convenience.
• it is necessary to monitor the quality of assembly: the construction should not be able to touch the metal elements, otherwise there will be no short circuit. It is best to leave some space between the transformer and the board, which will have a positive effect on cooling.
• If any part of the circuit is very warm, you may install a heat sink module or a venting slot.

With your own hands

For users with special knowledge, skills, will not be difficult to solve the problem of “whether you can power an electric screwdriver from the charger without special tools”, t.к. Assembly of the power supply unit is possible with your own hands. The power module, assembled according to the diagram, is inserted into the housing instead of the damaged elements. The outgoing voltage is measured, the wires are plugged in, and the case is locked.

Tip: The circuit may require additional load, it can be provided by the inclusion of a light bulb at 15W, which also provides backlighting.

A computer module will also work

Another solution to the problem of powering an electric screwdriver. mounting it to a computer power supply unit. This option is applicable to such modules, which are equipped with a mechanical lever. The positive aspect is that the unit is cooled by a cooler, protected from exaggerated loads by a built-in special system.

To arrange such an assembly only with the use of power modules at 300-350 W and a current of 12 volts, not less than 16 A. For tools with more than 14 volts this way of powering does not work.

The user may want to hide the unaesthetic unit in a beautiful case, then it is recommended not to forget to arrange ventilation in it.

Car charger

In searching of the decision of a question “whether it is possible to connect the electric screwdriver to the charger”, you can stop on charging by the car AK-block. Modules with manually controlled current, voltage are applicable. Connection is absolutely easy. just connect the input channels of the tool’s motor with the contacts of the car charger.

General recommendations

All of the above methods have one common feature. disassembly of the supply module housing. If the frame is mounted on bolts, it is not a problem, fixing the adhesive requires careful opening of the seam by tapping on the gap with a hammer, buried in it a knife.

During installation the direction of voltage must be respected. it must not apply to the battery. Therefore, the module is mounted in parallel with the power contacts, in the plus line is built in a diode illuminator of a certain power.

Summary: to the question “can an electric screwdriver work from the charger” there is a positive answer, and several options for a solution, but requires caution, some scientific knowledge and dexterity.

Electric screwdriver with self-contained power supply, is clearly one of the best inventions of mankind, and it greatly facilitates the life of almost all mu.

Indispensable household helper. cordless screwdriver. the tool is with you everywhere, but it works exactly until the battery runs out, but the number of charge cycles it has is limited, even from idleness of the battery can ruin. Batteries live about three years, and after that time you will have to replace it. You can save the tool if you convert it from cordless to corded, and there are different ways to do it.

Why convert a cordless screwdriver?

Why convert a screwdriver and when you need it? If you are reading this article, you have probably already appreciated all the convenience of this tool. it has no extra wires and can be used at any time, even in the most inaccessible places, until the battery runs out. This is the first disadvantage of the screwdriver. The cheaper the tool, the faster its battery will exhaust the resources of charging cycles. Here’s the second disadvantage. And you should understand that the manufacturer is saving just as much money as you are, and there’s nothing unusual about that. Buying a new battery is not much different in terms of costs than buying a screwdriver, but there is a way out, and now we will look at options for converting a cordless screwdriver to mains power.

There are several ways to convert a cordless screwdriver to mains power:

• Using a laptop charger;
• Using a power supply from a PC;
• using a car battery;
• Using a power supply from halogen bulbs;
• using a Chinese 24V power supply board.

How to convert a cordless screwdriver to 220 volt power?

The methods for converting a cordless screwdriver to mains power vary in complexity. Connecting the charger from a laptop requires little knowledge, to install the computer power supply unit you need to be friends with a soldering iron, and to reconfigure the Chinese unit the master should be able to handle the measuring tools.

Using a laptop charger

This method requires a minimum of technical knowledge. If there is a need to convert the screwdriver in the mains, you can help an unnecessary charger from a laptop, as it has similar characteristics and easily found in any home. First you need to see what the output voltage of the battery charger. 12-19V chargers will work.

It will be necessary to modify the battery block, to do this you need to disassemble it and take out the failed batteries.

• Take a laptop charger.
• Cut the connector and strip the wires from the insulation.
• Take the bare wires and solder them. If you can’t do that, you can wrap it up with electrical tape.
• Make a hole in the case for the wire and assemble the construction.

Using an external power supply from a computer

So you’ll need an “AT” size power supply. You are likely to find it at home, but you can easily buy an old, working power supply at any radio market. Its cost is unlikely to be high. It is very important to remember that the power supply unit, the power of which is 300-350 W and the current in the 12 V circuit is not less than 16 A, is suitable.

• Unscrew the case of the power supply. Under the case you will see the fan, the board and a lot of wires going from the board to the connectors.
• Requires the removal of the power protection. To do this, locate the green wire on the large square connector.
• Connect the green wire to any black wire from the same connector. For convenience you can cut it shorter and leave it inside the case. Alternatively you can use a jumper made from a small piece of wire.

Using a car battery

This modification is the same as using a laptop charger. Thanks to the current trend toward compact pulse chargers, linear analog units with manual controls can be purchased at the car market at a very attractive price.

If the voltage on the battery changes smoothly, it will fit absolutely any screwdriver, and the remake of such a tool is as follows:

• To connect the screwdriver to the car battery, use inexpensive wires with a small cross section, car cigarette lighter wires will do.
• On all sides of each of the wires, cut off the so-called “crocodiles”, on the free end strip the wire from the insulation by 2-3 cm.
• Next, connect the wires. To connect the wires to the terminals, you need to bend some of them in half the part that is stripped, and then pass them inside the terminals to make a kind of hook.
• For better fixation tighten all connections with plastic ties or solder them. Don’t forget about polarity, usually alligator clips are labeled.
• The next step is to assemble, it is necessary to insulate everything. First, it is better to wrap each connection so that no metal parts stick out, and then wrap it all together, the terminals must not touch.

Using a Chinese power supply board

So we are talking about a power supply with an output voltage of 24V and a maximum current of 9A. Wrenches are usually designed for 12 V or 18 V voltage, so first we have to lower the voltage to an acceptable level.

In order to change the output voltage, it is necessary to make an improvement in the feedback circuit. The output voltage is controlled by the resistor under R10. Its nominal value is 2320 Ohm. Instead of this resistor we will install the trimmer, so it will be possible to change the output voltage of the power adapter to our needs, the trimmer has a rating of 10 kOhm.

• Disconnect the DC resistor.
• Before installing the trimmer, it is recommended that its resistance be set to about 2300 Ohm. This is done so that the output voltage of the power supply was about 24 volts, and the power supply does not go into protection from too high or low output voltage.
• solder the trimmer.
• Turn on the power supply and adjust the voltage by turning the trim screw. After changing the output voltage, check the characteristics of the power supply: the maximum output current and power. When the current exceeds 7.6 A, the power supply goes into overload and sharply lowers the output voltage.
• Check what will happen at 12 volts. Adjust the output voltage. Maximum output current of more than 9A, excellent!

How to connect an electric screwdriver to a car battery

Inexpensive screwdrivers for those who do not use the tool very often are good. But, as practice shows, for the time being. Most of them have batteries that fail fairly quickly, and sometimes they just don’t have enough power. A simple variant of modification of the tool will help to solve this problem. At the output you will get an electric screwdriver that will run directly from a car battery.

To modify an electric screwdriver with your own hands, prepare:

• The electric screwdriver itself;
• A long Phillips screwdriver;
• file;
• clamps for the battery with wires;
• wire cutter;
• blade;
• soldering iron;
• solder;
• Remove the tape from the tool.

Before you begin, you should completely disassemble the tool. Use a thin long screwdriver for this.

Remove one half of the casing first and leave the other half with its inner contents in its original form. Remove the battery from the tool. Your electric screwdriver might look a little different from the inside. Here already depends on the manufacturer. Be sure to find a positive and negative electrode. You will need these for further work.

Note the position of all the internal parts and take them out of the tool carefully.

Feel free to cut off the lower part of the plastic housing, which serves as a support, with a file. In a modified electric screwdriver, this part will be superfluous. Try to cut symmetrically on both tool halves.

Strip the wire ends on the battery clamps. To do this, use a sharp knife. If your wires are too long, cut off the extra pieces with wire cutters and only then strip them.

Connect the wires to the electrodes. In this case, the design was a bit unusual, so it was enough to put the wires in the clamps and secure them with duct tape. In most cases you will need to use a soldering iron and solder to connect. Be prepared for this in advance.

Reassemble the electric screwdriver. Insert the internal contents, wire with clips to the outside. Reassemble the housing and fasten it with screws. At the bottom, where the stand was, secure everything with duct tape, covering the hole that was formed with it.

The result of your efforts is a greatly improved electric screwdriver with a higher performance than before. You can use it when you are on the road or far from where you can charge the battery of the tool itself.

What you need for rewiring

In addition to the electric screwdriver and power supply, you’ll need a power supply for the job:

• soldering iron;
• solder and flux;
• multimeter;
• several wires with a cross section of 2.5 mm or more 2 ;
• insulation tape;
• a sharp knife, chisel, or scalpel.

You also need a minimum knowledge of radio electronics, the ability to use a tester and soldering iron.

A cable to connect the electric screwdriver to the mains

The wire can be thinner than 2.5 mm 2. if the tool is not to be subjected to prolonged stress. Otherwise, overheating of the cable, melting of contacts with the subsequent short circuit is possible. The length of the wire determines the voltage drop, so do not

The use of a cord longer than 3-4 meters is not recommended because of the voltage drop. Maneuverability and portability of the tool will be enhanced by the use of an extension cord. Do not twist a couple or more pieces of wire, especially those with different cross sections, made from different materials. This approach lowers the current parameters. in the places of twisting the resistance increases.

The power supply capacity of an electric screwdriver

Calculating the power consumption of an electric motor of an electric screwdriver has been known since school. Multiply the current absorbed by the voltage applied. For example, if the battery indicates: 3 Ah and 18 V, you need a power supply that delivers a current of at least the corresponding parameters. These values are valid for no-load operation.

For normal operation of the motor under load, a margin of about 30% is required. Otherwise there is not enough power to screw fasteners, with a huge reserve, the battery may fail.

The rating of the battery is printed on the housing

Just a side note! The current strength of household tools reaches 3-4A, professional. can exceed a dozen amps. The voltage is 12, 14 or 18 V. All parameters are indicated on the battery case, in the instruction manual, data sheet or on the official website of the manufacturer and vary for different models.

How to remake an electric wrench to work from a household network

Consider available options for modifying the tool, which can cope people who are somehow familiar with electronics. know how to hold a soldering iron in his hands and measure voltage with a multimeter.

Standard battery charger

Connecting an electric screwdriver to power through the battery charger will not work. The battery charger is designed to power the battery, and its current is lower than that of the battery. Therefore, the motor will rotate slowly, developing dozens of percent of the original power due to the lack of supply current. An attempt to stop the rotation of the chuck of a screwdriver or screwing fasteners will lead to a sharp increase of current: from 1,2-2 A to 6-20 A, work of the device within the capabilities.

Charging from a laptop to power an electric screwdriver

The easiest way to power an electric screwdriver from a 220 V mains supply. Laptop battery chargers provide 12 to 19 volts. It is necessary to estimate the power reserve. For example, a 19 volt battery with a current of 3.2 A will be too much for a 12 V motor with a load of 1.3 A.

The instructions are the simplest. Twisting wires without a soldering iron is a good idea, but not a good idea.

Important! The remaining battery banks should be left in the battery case, they perform the role of a balancer. Without cells, the screwdriver is uncomfortable to hold, even with two hands. it will lean toward the chuck.

Computer power supply instead of the battery of an electric screwdriver

Most unnecessary, but working ATX form factor power supplies are capable of providing the motor of an electric screwdriver with electrical power. At the beginning, rough calculations are made. The 12-volt battery has a starting current of 18 amps. For starting the motor it is necessary to have 216 W of power, you need a 220-240 W power supply. In an hour it is reworked with a soldering iron and measuring tools.

The solution with a computer power supply has a couple of disadvantages:

• The electronics will not fit into the battery case of an electric screwdriver, the stuffing will have to be left in the metal case of the power supply.
• The design is sensitive to dust, and when repairing the power supply will have to be protected separately from small debris, without interfering with cooling.
• The device will noticeably increase in weight.

Before modification it is worth checking the functionality and reliability of the solution.

• The power supply casing can be disassembled with a Phillips screwdriver.
• The green wire in the output bundle is shorted to any black wire in the same bundle.
• The device is connected to the mains.
• Use a tester to measure the potential difference between the yellow and black conductors of the bundle.

If it is equal to 12 V with minor fluctuations. everything is all right.

• The plug is cut off.
• Yellow and black wires are connected in parallel 3-4 pieces. twist.
• The green starter wire is shorted to the black wire.

The result is a 12-volt DC power supply with a decent current load.

Sometimes at low speeds. the start button is not pressed completely, the circuit is unstable: PSU turns off. the protection is triggered.

You can turn off and on PSU or connect LC-filter to the circuit. It will smooth out the noise that occurs between the PWM controllers of the motor starter button and the power supply.

In practice the picture is different. three capacitors, a resistor and an improvised coil.

To make the device more convenient to work with, you need to assemble it intelligently, so that nothing is hanging around, and the tool was convenient to use.

• The battery is disassembled, all components are removed from the case.
• Together they mount the LC-filter.

• From the power supply cut off unnecessary output wires, all except the green wire, if the PSU will be used only to power the electric screwdriver.
• It is soldered to the black on the same plug.
• Short pieces of copper cable are soldered to the common conductor and the 12 V wire.
• Connect to the cord that leads to the plug through the terminal block.

Remains to assemble the case and test the device.

Important! The length of the wire should not exceed 1.5 to 2 meters. If you get a longer cable, the percentage of energy dissipation is higher

The solution will quickly turn a corded electric screwdriver back into a cordless screwdriver after you purchase the battery.

Powering an electric screwdriver from a car battery charger

As an alternative, it is acceptable to use the battery charger for automotive and other rechargeable batteries as a secondary source of power for the electric motor of an electric screwdriver. Usually they are adjustable. with the function of switching the output voltage and current. Car chargers are chosen based on those listed on the electric screwdriver battery plus ~ 30%.

For connection, the charging terminals are connected to the battery terminals of the electric screwdriver, observing the polarity. It is advisable to solder pieces of wire to the contacts of the tool, and connect the other ends to the alligator clips of the battery charger.

How an electric screwdriver works with a car battery

Power the electric screwdriver from the car battery

The electric motor of the tool can be powered by the battery of the tractor, car and other appliances, where there is a voltage regulator.

• As in the case with the charger for car batteries to the terminals of the electric screwdriver are soldered two conductors, such as spare wires with cut alligators.
• The other ends of the wires are stripped by 3-5 cm, bent by hooks and fixed to the battery terminals, for example, clamped by nuts or clamps.

• After setting the desired current parameters it is possible to work. Remember to observe the polarity.

Chinese power supply board as a power source for an electric screwdriver

It is an adapter with 24 V and 9 A, which is enough for powerful screwdrivers that require 18 V. You can purchase the board in electronics stores or order it directly from China. Let’s take a popular model as an example.

First of all the constant resistor is replaced with a variable one. a regulating resistor.

Instructions for conversion

Consider in detail, step by step, how you can convert a cordless electric screwdriver to a cordless screwdriver.

Disassemble the battery

In order to convert the tool to a corded tool that draws voltage from the native charger or computer power supply unit, simple steps must be followed.

Firstly disassemble the old battery pack. Unscrew the fixing screws. An important prerequisite is to keep all terminals.

Remove the guts

Remove the battery and carefully loosen the terminals. Then a wire with a cross-section that can withstand the operating current is soldered to these terminals. The wire should be at least 2.5 mm² and the length you need for comfortable operation of the electric screwdriver. Now remember which color wire you are soldering the minus and plus sides to.

Reconnect the wires

Disassembling the computer power supply housing. Remove the board and unsolder the wires on the power supply stub. To the wires coming out of the power supply unit, instead of the yellow and black wire solder wires with terminals from the battery. The black wire is the minus terminal, and the yellow wire is the plus terminal.

It is possible to increase the wattage of your PSU if you connect the black wire to the black and the yellow wire to the yellow. This improves the performance of the electric screwdriver because it reduces the losses.

To start the computer power supply you must connect the green wire from the 20 pin connector to the black wire. This can be done directly on the PSU PCB. For convenience, you can connect a switch to the green and free black wire.

For ease of use, you can solder a special connector to the wires, allowing them to disconnect. It is necessary to observe the polarity, otherwise you can damage the electric screwdriver. To do this, the connector must be keyed (a special tab on the body, not allowing it to connect it incorrectly).

Assemble everything back and connect the electric screwdriver to the 220V mains

It is necessary to assemble “modified” battery. Insert terminals with wires into the capacitor and lead them out through the drilled hole. Inside the case of the former battery is recommended to put a capacitor 10000 uF capacity of 16 V or 25 V and connect it to the terminals in parallel. Choose a capacitor with a voltage of 1.5 or 2 times the nominal voltage of the tool.

Such capacitor will compensate high inrush current. If it is not put, the likelihood of power supply tripping by the built-in protection is greatly increased. It is also recommended that a weight be placed inside the tool to balance it. This will reduce the strain on your hand while working.

Important! Before assembly, all wires must be properly secured to prevent them from coming loose.

Put the computer power supply together and connect the electric screwdriver to the 220 V mains. If you find the tool lacks power when you check it, you can replace the low-voltage power cord.

Tips for Use

Experts change screwdrivers, which can easily cope with the established task, advise beginners to follow certain rules:

• The mains electric screwdriver is capable of working for several hours straight, so allow it to rest for five minutes to prevent overloading.
• The wire should be secured at the elbow to prevent interference.
• Power supply should be systematically cleaned of dust and dirt.
• The battery (new) is provided with earthing.
• It is not advisable to use a large number of extension cords.
• Do not use an electric screwdriver when working at height (starting from two meters and above).

Following these tips will help keep the tool in working order and prolong its service life.

Power Supply Options

Any electric screwdriver requires much less voltage than a regular socket. Therefore, in order to make a boost, a special converter is needed, the output of which will produce the necessary voltage. All power supplies are divided into two large groups: pulsed and transformer. Let’s look at each of them separately.

Impulse

The principle of impulse systems is that the voltage is first rectified and then converted to a special pulse signal. It is important to achieve a stable voltage. A transformer winding or resistors can help with this.

Switching power supplies are quite efficient and can be used in a variety of conditions. At the same time they have a high level of protection against short circuits and similar effects. But the pulsed systems are clearly inferior to the transformer ones in terms of power. In addition such blocks are very sensitive to the input voltage. If it is below a preset value, the element can simply not work.

Transformer

common power supplies that have proven their reliability and efficiency in many applications. This consists of a step-down transformer and a rectifier, through which the undervoltage is passed. Rectifiers can be different, depending on the number of diodes used.

Such elements are simple to make, cheap and reliable. That is why they are often preferred. They provide a stable, jam-free voltage with a high maximum output. But there are a few disadvantages. The main disadvantage is cumbersome, with much less efficiency than pulse sources. This fact requires that a power supply for an electric screwdriver should be chosen with more power than is necessary for the tool. Since part of the capacity will be spent on side processes.

Materials and tools needed

Materials and tools when remodeling an electric screwdriver depend entirely on the type of tool and the type of power supply, as well as its features. But to summarize, there are a few basic tools:

• screwdrivers;
• pliers;
• knife;
• insulating materials;
• The cable for the power supply;
• soldering iron and soldering materials
• some kind of housing for the future power supply.

Other ways to feed the power supply

Unit inside

The solution to the problem of “whether you can connect an electric screwdriver through the charger” can become an alternative version of powering an electric screwdriver. installing the power supply in the empty housing of the power tool.

Before you begin, it is necessary to prevent overheating of the unit, for which purpose, holes must be arranged in the housing in advance, which will provide air movement, heat dissipation. Continuous work time with an electric screwdriver with this improvement is reasonable to reduce to 15 minutes.

Purchased ready-made unit, it is selected according to the size of the housing, technical indicators. The pulse version of the module is the most suitable, it is small-sized, lightweight. Not recommended the use of modules of domestic production of the last century. they have a large volume at a low efficiency.

Unsuitable batteries are removed from the box and the power pack is put in their place. Contacts are energized, the case is closed. The assembled hybrid gadget is ready to work from the mains.

• Wires can be extended for convenience.
• It is necessary to monitor the quality of the assembly: the design should not be able to touch metal elements, otherwise a short circuit will not avoid. It is best to leave some space between the transformer and the board, which will have a positive effect on cooling.
• If any parts of the structure are very warm, you can install heat-removing modules or arrange ventilation slots.

By our own efforts

For users with special knowledge, skills, will not be difficult problem “whether you can power an electric screwdriver from the charger without special tools”, t.к. The assembling of the power supply unit is possible with your own hands. Power module, assembled according to the circuit, is inserted into the housing instead of the damaged elements. Outgoing voltage is measured, wires are powered, the housing is locked.

Tip: the circuit may require additional load, it can be provided by the inclusion of a 15W light bulb, which will also provide backlighting.

A computer module will also work

Another solution to the problem of powering an electric screwdriver is to mount it to a computer power supply. This option applies to such modules that are equipped with a mechanical on-off lever. The positive aspect is that the unit is cooled by a cooler, protected from exaggerated loads by a built-in special system.

This assembly can be assembled only with 300-350 W power supply modules and 12 volt current of at least 16 A. For tools with more than 14 volts this way of powering does not work.

The user may want to hide an unaesthetic unit in a beautiful case, then it is recommended not to forget to arrange ventilation in it.

Car charger

When looking for a solution to the question “can an electric screwdriver be plugged into a battery charger”, you might consider charging with an automotive AK unit. Modules with manually adjustable current, voltage are applicable. Connection is absolutely easy, just connect the input channels of the tool motor with the contacts of the car charger.

General recommendations

All these methods include one unifying stage. disassembly of the housing of the power module. If the frame is attached to the bolts, it is not a problem, fixing it on the glue requires careful opening of the seam by tapping on the gap with a hammer, burying a knife in it.

When installing, observe the direction of voltage. it must not be fed to the battery. Therefore, the module is mounted in parallel with the power contacts, in the plus line is built a diode illuminator of a certain power.

Summary: the question “can an electric screwdriver work from the charger” has a positive answer, and a few solutions, but requires caution, some scientific knowledge and dexterity.

Electric screwdriver with an autonomous power supply, is clearly one of the best inventions of mankind, and it greatly facilitates the life of almost all mu.

How to convert a cordless screwdriver to work from 220 volts?

Methods of converting a cordless screwdriver to work from the mains vary in complexity, most often it is necessary to connect the electric screwdriver directly to the charger. Connecting the battery charger from a laptop requires almost no knowledge for the installation of computer power supply unit need to be friendly with the soldering iron, and for reconfiguration of the Chinese unit the master must be able to handle measuring tools. Take into account, as a rule the native power adapter of an electric screwdriver is not designed for direct connection of the electric screwdriver, its power is designed only for charging the battery.

How to connect an electric screwdriver directly to the laptop charger

This method requires a minimum of technical knowledge. If the need arises to convert the screwdriver into a corded screwdriver, you can help you unnecessary charger from a laptop, as it has similar characteristics and easily found in any home. First you need to see what the output voltage of the battery charger. Suitable chargers for 12-19V.

It is important to check the voltage and current charger

It will be necessary to refine the battery unit, for this you need to disassemble it and take out the failed batteries.

• Take a laptop charger.
• Cut the connector and strip the wires of insulation.
• Take the bare wires and solder them. If there is no such a possibility, tape them down.
• Make a hole in the case for the wire and assemble the design.

Use an external power supply from a computer

So you need a “AT” size power supply. It’s likely you’ll find one at home, but you can easily buy an old working power supply at any radio market. Its cost is unlikely to be high. It is very important to remember that you need a power supply with a capacity of 300-350 W and with a current of at least 16 A in a 12 V circuit.