What can be connected to the battery from a screwdriver. How to convert a cordless screwdriver into a corded one in different ways. Installation of a finished power supply in the housing of an old battery

The service life of the screwdriver is 5–7 years, and its battery life is best case scenario 2 years. This means that by replacing the power source, you will be able to extend the life of your favorite instrument by at least 2 years. Of course, it is best to find an original battery, but the problem is its availability and cost.

How to replace a battery for a screwdriver

It’s worth noting right away that homemade modifications will reduce the mobility of the screwdriver due to the additional wire from the new power source and its weight. On the other hand, the operating time on a single charge will increase to 12–20 hours, versus 2–3 with the original battery. This will be very useful at remote sites without power supply.

For convenience and safety, you should use a flexible wire in double insulation, such as PVS and ShVVP. Section 0.75 mm 2 and more.

You can connect it in two places:

to the screwdriver handle;

to the body of the old battery. The cast body is split by a sharp blow with a screwdriver or separated by a hacksaw blade at the soldering site. Then the old one is deleted lead battery

, and power from a new source is connected to the freed wires, observing polarity.

Battery selection

The main parameter that needs to be taken into account is the supply voltage indicated in the passport or on the case. The motors used in screwdrivers also operate at reduced voltage, losing somewhat in speed and torque. The most affordable batteries will be acid ones for cars, motorcycles, and also for uninterruptible power supplies.

Automotive The question often arises whether it is possible to connect a screwdriver to car battery . Indeed, you can use a battery that has exhausted its life, the capacity of which is no longer enough for a car, but enough for.hand tools

The standard voltage of car batteries is 12 volts.

Due to its weight of 14 kilograms, it is advisable to use such a source at a stationary workplace, scaffolding or moving platforms. The wire length is 2–3 meters. Charging will have to be done with a third-party device due to the high charging current.

Motorcycle

Gel (batteries for UPS)

Their advantage is sealed housing and paste electrolyte, which allow the instrument to be used in any spatial position. Can be used charger from a screwdriver. Here you don’t have to worry about acid burns or damaged clothes. You can attach the battery directly to the screwdriver or carry it in your bag or pockets.

Precautionary measures

Please note that connecting a new power source is an intervention in the factory design. This means that it is important to pay attention to personal and fire safety. Remember what you need:

observe polarity;
reliably insulate wire connections;
Use chargers designed for the capacity of this battery.

To replace the battery, minimal knowledge of electrical engineering is sufficient. Plumbing skills will also come in handy. It is necessary to ensure increased mechanical strength of the wire connection points.

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Inexpensive screwdrivers are good for those who do not use the tool very often. But, as practice shows, for the time being. Most of them have batteries that fail quite quickly, and sometimes they simply do not have enough power. A simple tool modification will help solve this issue. As a result, you will receive a screwdriver that will work directly from the car battery.

You can order a battery for a hoverboard. Then connect your screwdriver to it.

Materials

To modify a screwdriver with your own hands, prepare:

the screwdriver itself;
long Phillips screwdriver;
file;
battery clamps with wires;
wire cutters;
soldering iron;
solder;
electrical tape.

Step 1. Before starting work, you need to completely disassemble the tool. Use a thin, long screwdriver for this.

Step 2. First, remove one half of the case, and leave the second with its internal contents in original form. Remove the battery from the case. The inside of your screwdriver may look a little different. Here everything depends on the manufacturer. Be sure to locate the positive and negative electrodes. For further work they will be needed.

Remember the location of everyone internal parts tool and carefully remove them from the housing.

Step 3. Feel free to cut off the lower part of the plastic case, which serves as a stand, with a file. In a modified screwdriver this part will be redundant. Try to cut the parts symmetrically on both halves of the tool.

Step 4. Strip the ends of the wires on the battery terminals. To do this, use a sharp knife. If your wires are too long, cut off the excess parts with wire cutters and only then strip them.

Step 5. Connect the wires to the electrodes. IN in this case The design was a little unusual, so it was enough to thread the wires into the clamps and secure them with electrical tape. In most cases, you will need to use a soldering iron with solder to make the connection. Be prepared for this in advance.

Step 6. Reassemble the screwdriver. Insert the internal contents, bring the wires with clamps out. Assemble the housing and secure it with screws. In the lower part where the stand was, secure everything with electrical tape, covering the resulting hole with it.

A wonderful household assistant is a cordless screwdriver. This tool will be with you everywhere, but it works exactly until the battery runs out, but the number of charge cycles is limited, even from idleness the battery can deteriorate. The batteries last about three years, and after this time you will have to replace it. You can save a tool if you convert it from battery-powered to mains-powered, and there are various ways such an alteration.

Why remake a cordless screwdriver?

Why remake a screwdriver? When does such a need arise? If you are reading this article, you have probably already appreciated all the convenience of this tool. Without unnecessary wiring and at any time, you can use it even in the most inaccessible places, until the battery runs out. This is the first drawback of the screwdriver. The cheaper the tool, the faster its battery will exhaust its charging cycles. Here is the second drawback. And you must understand that the manufacturer saves just as much as you do, and there is nothing unusual about this. Buying a new battery in terms of costs is practically no different from buying a screwdriver, but there is a way out, and now we will look at options for converting a screwdriver from battery to mains power.

There are several ways to convert a screwdriver from a cordless one to a mains one:

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

How to convert a cordless screwdriver to work on a 220 volt network?

Methods for converting a cordless screwdriver to work on mains power vary in complexity. Connecting charging from a laptop requires almost no knowledge for installation computer unit power supply, you need to be familiar with a soldering iron, and to reconfigure a Chinese unit, the master must be able to handle measuring instruments.

Using a laptop charger

This method requires minimal technical knowledge from you. If there is a need to convert a screwdriver into a network one, an unnecessary laptop charger can help you, since it has similar characteristics and can easily be found in any home. First you need to look at the output voltage of the charger. 12-19V chargers are suitable.

It is important to check the voltage and current of the charger

Will need some work battery pack, to do this you need to disassemble it and remove the failed batteries from there.

Take a laptop charger.
Cut off the connector and strip the wires of insulation.
Take the bare wires and solder them. If this is not possible, tape them with electrical tape.
Make a hole in the body for the wire and assemble the structure.

Using an external power supply from the computer

So, you will need an AT format power supply. It is likely that you will find it at home, but you can easily purchase an old working power supply at any radio market. Its cost is unlikely to be high. It is very important to remember that a power supply with a power of 300–350 W and a current in a 12 V circuit of at least 16 A is suitable.

The AT type computer unit will power the screwdriver

In this regard, the same “AT” format power supply, which is located in the case of any desktop computer, is good because the power is always honestly indicated on it. Such power supplies always have a power button, as well as a fan for cooling, and an overload protection system.

The modification steps are as follows:

Unscrew the power supply housing. Under the case you will see a fan, a board and many wires that go from the board to the connectors.
It is necessary to remove the power-on protection. To do this, you need to find 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.

Connector contacts: yellow wire +12 V, red wire: +5 V, black - ground

Cut off unnecessary wires, leaving yellow and black.
Using a piece of wire as an extension cord so that the power supply can be in a convenient place during operation, solder it to the yellow and black wires
We attach the other end of the wire to the terminals of the empty battery compartment, as in the previous instructions.

Video: how to convert a screwdriver to work from the network

Using a car battery

The principle of such a modification is no different from the method using charging from a laptop. Thanks to current trends towards compact pulse charging, linear analog devices with manual control You can buy it at the car market at a very attractive price.

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

Taking a Chinese power supply board

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

To change the output voltage, you need to make modifications to the circuit feedback. The resistor under position R10 is responsible for the output voltage. Its nominal value is 2320 Ohm. Instead of this resistor, we will install a trimming resistor, thus it will be possible to change the output voltage of the power supply to suit our needs, the value of the trimming resistor is 10 kOhm.

If the battery is faulty: how to make an adapter for a screwdriver?

There are two ways to make an adapter: use old battery This is a convenient block, because it already has a connector that is suitable for a screwdriver, or you can connect the wires directly to the handle.

Connecting the old battery pack

Connecting the old unit is done as follows:

Connecting wires directly

Connecting wires directly to a screwdriver is done as follows:

Congratulations! Now that you have learned how to convert a screwdriver into a network one, you can put this knowledge into practice. And it doesn’t matter whether your screwdriver is charged or not. You don't have to worry about how long the battery will last. Good luck with your remodel!

If you have the same profession as me, you often travel to various installations in places where there is sometimes no electricity. Or it is not yet on your summer cottage. You've probably encountered a situation where your screwdriver "sits down" or is not charged when you need to drill or tighten something. It would be great to have a cordless screwdriver that doesn't need to be constantly recharged.

My screwdriver is 12 volt. Of course, the first thought that comes to mind is to connect the screwdriver to the car battery. I've read a lot of instructions on this, but they weren't user-friendly or pretty enough for me. My version seems to me much more elegant and convenient. As a result, I want to convert a few more of my tools to power from a car battery. So let's get started!

Stage 1: We sacrifice the screwdriver!

There are so many of them standing alone on shelves in thrift stores or sold on bulletin boards. Sometimes lifeless, without batteries - Skil, Ryobi, DeWalt, Bosch and others are looking for their new owner. They come in all shapes, sizes, colors. Various power (9.5 volts, 12 volts, 18 volts, 19.2 volts, 28 volts) and battery type (lithium-ion, cadmium, etc.). Many of them are outdated. It was easier for their previous owner to throw away his assistant and buy a new one. So these lost children sit on shelves collecting dust until the thrift store clerk finally throws them out. I'm talking to you about the Screwdriver! Or rather, about a used screwdriver.

So, what we need is a 12-volt screwdriver, which we don’t mind parting with. This is what I managed to buy for 300 rubles. (see photo above) This screwdriver did not have a battery.

Stage 2: Disassembly

As you can see in the photo, the bit did not fit into the hole all the way and could not reach the screw head. Using a drill, I had to slightly increase the diameter of the hole so that the bit could easily fit into it.

Start by removing the obvious screws that hold the screwdriver body together. My screws were Torx T10s, most likely yours will be exactly the same. For the most part, they all came out easily.

Stage 3: Getting to know the “internals”

Once all the screws were removed, I was able to remove half of the plastic case. Even for people far from engineering :) basic device A screwdriver will seem quite simple. In the handle we have two metal terminals that were connected to the battery. One of them was marked “B+” and the other “B-”. I assume that the letter "B" is from the English word "battery" (battery or battery), +/- indicate positive and negative polarity, respectively.

Stage 4: Trim the handle

I thought my screwdriver would look stupid and clunky with the bottom plastic flange where it was standard battery. So I decided to cut the handle. Problem solved.

Stage 5: Electrical wiring

To connect the screwdriver to the car battery, I used car cigarette wires. Inexpensive wires with a small cross-section are suitable for these purposes. I bought a 150A 2 m long for 300 rubles.

On each of the wires on one side it is necessary to cut off the so-called “crocodiles”. At the free end we strip the insulation by about 2-3 cm.

Stage 6: Connecting the wires

As you can see, the screwdriver connectors were of an unusual shape. In order to connect the wires to these terminals, I bent the stripped part in half as seen in the photo. Then I threaded them inside each terminal. It turned out to be a kind of hook. After that, for reliable fixation, I tightened each connection with plastic clamps. I think that professionals would definitely solder the wires, but I have little experience in soldering :-).

Attention, observe polarity! Most often, the “crocodiles” from the cigarette lighter wires have a polarity mark.

Stage 7: Assembly

Next, our task is to properly insulate everything. I used ¾ roll of duct tape for this. First, I wrapped each of the connections so that no metal parts protruded. Then I wrapped everything together so that the terminals did not touch each other.

When I assembled the screwdriver body, I wrapped the wires at the exit from the body with electrical tape for insulation and fixation.

Congratulations! Now it doesn’t matter whether you forgot to charge the screwdriver or not and how long its charge will last. With such a tool you can work for a long time, even where there is no electricity at all.

A cordless screwdriver is a great helper in the household. The tool works together with the master in the house and in the garden, works in the garage or in the field. Until the battery runs out. The number of charge-discharge cycles of a battery is limited; the battery also deteriorates from idleness: self-discharge destroys the cells. On average, a battery lasts 3 years, after which it has to be replaced. You can save the instrument by converting it into a network one. Rework in progress different ways.

Is it really worth redoing?

Without battery driven screwdriver turns into a piece of iron. When the batteries stop holding a charge, you have to look for new batteries. Firstly, it is expensive - the price of batteries is up to 80% of the cost of a screwdriver; it is more efficient to buy a new tool. Secondly, batteries are not always on sale, for example, if a model is discontinued. Thirdly, a thrifty owner strives to use every opportunity to save money.

Converting a cordless screwdriver to work from electrical network- a good way out. What does it give:

The instrument gets a new life.
No more batteries needing to be charged.
The torque of the tool does not depend on the battery charge.

The disadvantage of the redesigned design is the dependence on the outlet and the length of the network cable.

Attention! Work at a height exceeding two meters with a converted screwdriver is not allowed.

How to convert a cordless screwdriver to work on a 220 Volt network

Craftsmen have come up with several ways to convert a screwdriver to work from an electrical network. They all involve providing the motor with the required supply voltage using an intermediate source or converter.

Table: power supply options for a corded screwdriver

Power supply	Advantages	Flaws
Complete screwdriver charger.	An easy modification. Uses existing charger. There is no need to select the power supply voltage.	The charger takes up space on the desk.
A ready-made power supply placed in the housing of an old battery.	An easy modification. No intervention required electrical diagram screwdriver.	Search for a ready-made compact power supply for the required voltage. The power supply heats up in a closed case, you need to take breaks from work.
A homemade power supply placed in the housing of an old battery.	Beautiful engineering solution- only the power cord comes out of the screwdriver. There is no loss in low voltage cable. No intervention is required in the electrical circuit of the screwdriver.	You need to select a circuit and find radio components. The technician must have experience in soldering, assembling and debugging electrical circuits.
External power supply	An easy modification.	The power supply takes up space on the desk. You need to find a suitable power supply.
Computer power supply	An easy modification. The computer power supply is easy to find. Any power supply from 300 W will do.	You need to disassemble the screwdriver and connect to its circuit. The power supply takes up a lot of space on the desk.

Connecting the screwdriver to the charger

Attention! At low voltage, losses in the wire are high, so the cable between the charger and the tool should be no longer than 1 meter, with a cross-section of at least 2.5 square meters. mm.

Sequencing:

Solder or attach two wires with alligator clips to the terminals of the charger.

Disassemble the old battery and remove the dead elements from it.
Drill a hole in the battery case for the cable, thread the cable into the hole. It is advisable to seal the connection with electrical tape or heat-shrink tubing to prevent the wire from tearing out of the housing.
Elements removed from the battery will disrupt the weight distribution of the screwdriver - your hand will get tired. To restore balance, a weight should be placed in the body - it can be dense wood or a piece of rubber.
Solder the cable to the terminals former battery, connected to a screwdriver.
Assemble the battery housing.
All that remains is to test the updated tool in action.

Installation of a finished power supply in the housing of an old battery

Attention! In a closed case, the power supply is poorly cooled. It is recommended to make holes in the walls of the housing. Do not operate the tool continuously for more than 15 minutes.

Procedure:

Disassemble the old battery and remove the non-functioning elements from it.
Install the power supply into the battery case. Connect contacts high voltage and terminals low voltage.
Assemble and close the battery case.
Install the battery into the screwdriver.
Plug the power supply into the outlet and check the updated network tool in operation.

Homemade power supply

Attention! Follow electrical safety rules. Solder and connect with the device de-energized.

Step-by-step instruction:

Disassemble the old battery case and remove the dead batteries from it.
Install the elements of the electrical circuit of the power supply on circuit board, solder the contacts.
Install the assembled board into the case. Use a tester to check the presence of voltage at the output.
Power supply in case
Connect the low voltage wires to the terminals of the old battery. Assemble the body.
All that remains is to assemble the battery case

Connect the screwdriver to the electrical network and check its operation.

Video: homemade lithium battery for a screwdriver

Connecting to an external power supply

Attention! During the modification process, you will need to disassemble the screwdriver body and interfere with the electrical circuit. Remember the disassembly sequence to reassemble all the parts in reverse order.

What to do:

Connecting to a power supply from a computer

Instructions:

Find or buy a computer power supply with a power of at least 300 W.
Disassemble the screwdriver body. Find the motor power wires inside. Solder the connectors for the computer power supply to the wires.
Remove the connectors for connecting the computer power supply from the case.
Connect the screwdriver to the new power supply.
Connect the power supply to the network and check the operation of the device.

Video: power supply for a screwdriver from a computer power supply

How to power a screwdriver while maintaining its autonomy

If the master works in a building that does not have electricity, and the batteries have already deteriorated, there are ways to power the screwdriver:

replace old battery banks with new ones;
connect the screwdriver to the car battery;
connect the tool to another battery, for example, taken from an uninterruptible power supply.

Replacing old elements

Attention! When replacing batteries, pay attention to the correct polarity of connecting the elements.