How to make a screwdriver directly from the network

Table of Contents:

How can you make a homemade screwdriver with your own hands

Very often, as a result of improper storage or during the depletion of its resource, the screwdriver batteries become unusable. Buying a battery for a specific instrument model is a very expensive purchase, but there is a way to give your screwdriver a second life. You can adapt it to power from a regular household 220 volt network.

How to make a homemade screwdriver

In order to power a screwdriver with your own hands from a household power supply, you will need:

  • a failed battery;
  • charger from him;
  • stranded wire;
  • insulating tape;
  • solder;
  • soldering iron;
  • acid.

First of all, you need to solder an electrical wire with a plug to the contacts of the charger. Since brass stamps are used in the block, and copper conductors in the wire, in order to solder them, acid should be used as a connector. The functioning of the entire device directly depends on the quality of this connection.

make, screwdriver, directly, network

At the second stage, work is carried out with a failed tool battery. Disassemble the battery and remove the internal parts from it. During this operation, personal protective equipment must be used, and the internal filling is recommended not to be thrown into household waste, but disposed of in a place safe for people.

At the final stage, it is necessary to solder the charger wires to the battery terminals, which are located in the inside of the case.

Advantages of converting a screwdriver for mains power:

  • Eliminates the need to constantly recharge a weak battery, which requires long interruptions in work, and they slow down the work process.
  • You can store such a tool for a long time without thinking about the required temperature and battery level.
  • The power supply from the mains is always the same. This allows you to maintain a constant torque throughout the entire operation.

In the event that, together with the battery of the screwdriver, its charger has become unusable, the following devices can be used as a power supply:

  • computer power supply;
  • car battery;
  • old inverter welding.

Re-equipping the instrument for power supply from a 220 volt network is quite a difficult task. Only those people who have the skills and knowledge in the repair and device of electrical engineering will be able to cope with it. If you do not have this skill, in order to avoid serious injury, the best option would be to buy a new battery or purchase a new screwdriver.

Screwdriver alteration process

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.

How to Magnetize a Screwdriver. The Easy Way

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.

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.

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.

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 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
  • 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

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.

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. over, 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.

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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.

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 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.

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

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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 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.

AC adapter for screwdriver in battery housing

We build in a ready-made power supply; for this, you need to purchase a ready-made block with suitable characteristics and dimensions. There is enough of this kind of stuff 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.

Self-made power circuit. If you are with a soldering iron on “you”. this material will come in handy as an instruction. The circuit is implemented on a donor, in the form of a ballast to a 150W halogen floodlight. The added components are indicated on the diagram with colored inserts.

An output transformer from an old computer power supply has been added, and Schottky diodes are taken from there. The midpoint of the secondary winding is between a pair of 12 turns each. Since this circuit does not start without load, a 15W incandescent lamp is constantly turned on at the output. At the same time, the illumination circuit is implemented.

The power supply fits easily into the battery case.

The design turned out to be so successful and inexpensive. that there was an idea to put the production on stream. With an abundance of cheap Chinese screwdrivers, demand will be ensured.

see the alterations of the screwdriver on the network with a selection of the power supply unit for it.

Benefits of cordless screwdrivers

Cordless screwdrivers are very convenient on the construction site. it is very easy to work with them on the roof, in difficult conditions, where dragging wires will only get in the way and create unnecessary danger. But this is where the battery breaks down most often. the screwdriver fell, the battery broke, and you have to look for a new one.

Let’s figure out how to make a screwdriver from the network.

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:

  • External power supply. The idea is not as absurd as it might seem. Even a large and heavy buck rectifier can just stand near the outlet. You are equally tied to the power supply, and to the stuck mains plug. And the low-voltage cord can be made of any length;

IMPORTANT! Ohm’s law says. at the same power, decreasing the voltage. we increase the current!

Accordingly, the 12-19 volt power cord should have a larger cross section than 220 volts.

DIY screwdriver alteration

Consider the option with a remote power supply

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, it means 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.

IMPORTANT! Use only power supplies with a capacity of 300-350W and an output current of 12 volts at least 16 amperes. Specification is indicated on the factory sticker.

Using a car battery charger The principle is the same as using a computer power supply. It is necessary to purchase an old charger for the starter batteries. The modern fashion for compact impulse chargers has left analog linear devices with manual control of voltage and charge current behind board. Therefore, such a device can be purchased on the automotive market for a symbolic cost.

It’s good if the voltage can be adjusted smoothly. in this case, your makeshift power supply will fit any screwdriver. Converting it to a power tool is reduced to connecting the input of the electric motor to the power terminals of the charger.

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

IMPORTANT! A homemade power supply must be made in the case. When manufacturing, be aware of the danger of electric shock and the possibility of short circuits. All input and output circuits are fused.

How a 12 volt screwdriver was converted to the mains

To make such a device, almost any computer source with a generator on the tl494 microcircuit will do. She has an analogue. This is a k 7500 microcircuit.

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A suitable block was found, his generator is made on a tl494 microcircuit. But before proceeding with the alteration, you need to make sure that the unit is working. This requires a 12 volt light bulb and a jumper wire. Each block has such connectors. The red wire is 5 volts, the two black wires are negative wires, and the yellow wire is plus 12 volts.

We connect a car light to a 12 volt mowing line. This will be a kind of load and an indicator that says that the device is working.

There is one more connector. We need a green wire and a black one. We need to close them in order to turn on the block and make sure that it is working. We will do this using a wire jumper. We connect 220 volts and close the green and black wires. As you can see, the fan spun, the light came on. This suggests that the unit is working and can be redone.

Let’s disassemble the circuit and redo the connection of the tl494 microcircuit, as shown in the diagram in the magazine article Radio, 2009, p. 38. “Computer power supply. charger.” This magazine can be easily downloaded on the Internet. We do not need the whole circuit, but we need a node responsible for connecting the microcircuit. The alteration in our case should be done in the same way as in this part of the circuit. We do to remove all protections from the unit and allow the generator to work so that the unit works immediately and does not turn off under load.

After the alteration of the circuit communications is done, we connect the power cord and connect it. And the power supply should work immediately, and the 12-volt light bulb should light up. All protections are disabled, the generator is allowed to run. After that, all the wires that go to the block are soldered onto a 12 volt mowing line. This is not enough for us to work with a screwdriver, we need to raise the voltage to 16 Volts for a power reserve. At the output of the circuit there is a 16 volt electrolytic filter capacitor. You need to unsolder it and put a capacitor at 25 volts, since we will raise the voltage to 16 volts and the previously installed capacitor will not withstand.

In the power supply circuit, there may be a resistor for other parameters, but you should put a 3 kilo-ohm resistor. It is also necessary to replace the section of the circuits in the block that goes to the 12 volt mowing line. Next, we connect a multimeter to the mowing line while the unit is running and using a variable resistor we increase the voltage to 16 volts. After that, the alteration can be considered almost complete. You need to solder a wire to a 12 volt mowing line, you can bring out indicators, switches.

Valery Odinets A year ago I have a dead professional Hitchi. I tried to power it directly from my own charging. it is SMART, GAD, does not want to! The native charger does not see the proper load, and is cut off. I had to put dead batteries in the buffer at the exit. Result. I endlessly work from the network, then 5 minutes on dead cumulators. Not very mobile, but free. And Hitachi-Pro is a beast, even with swotting.

220 V circuit

It’s not that hard to do. First of all, you need to find out the voltage and current of the instrument supply and select the desired mode. We are looking in the search for the characteristics of your brand of screwdriver and we get the necessary information. Now we buy a step-down transformer or take it from old electronics and assemble a simple circuit.

Shown is a circuit for switching from 220 volt mains voltage to 12 volt constant.

This way you will be able to power any device that previously served from akb. Such alteration will not negatively affect the service life of the screwdriver, but make sure that the tool does not overheat during prolonged work.

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

The third option is to convert the cordless screwdriver for mains operation. You will need knowledge of electronics and circuitry, so this is not for everyone. In addition, you will need to know the operating parameters of your battery.

If the battery is broken, then you can ask people on the DIY forums to measure the parameters of the current and voltage of the battery. This will help you make the mains power supply. Basically, if you have a good knowledge of electronics, you can simply disassemble the battery. In its design, there will be chemical batteries connected in a certain way. Knowing their type, from the name of the battery, as well as the connection diagram, you can quickly estimate the parameters of the battery. And then assemble the rectifier with the required operating parameters. Or even replace the cells in a failed battery. And then you don’t have to assemble the rectifier.

Power check

A screwdriver connected to a 90 watt transformer easily handles screwing in large self-tapping screws and drilling any material. After watching this video, it becomes clear that finding a power source for a screwdriver whose battery has become unusable is not problematic. Finding a computer unit is not difficult. An even more convenient option is a laptop block for 6 or more amperes. It is advisable to find a device with a current of more than 10 volts, since 6-volt from time to time will go to protection.

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.

️37.69 WAKYME 40NM Electric Screwdriver 18V Cordless Drill/Driver Screw Lithium Rechargeable Powe

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 of this kind of stuff 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.

Homemade power scheme.
If you are familiar with a soldering iron. this material will come in handy as an instruction.
The circuit is implemented on a donor, in the form of a ballast for a 150W halogen floodlight. The added components are indicated on the diagram with colored inserts.

An output transformer from an old computer power supply has been added, and Schottky diodes are taken from there. The midpoint of the secondary winding is between a pair of 12 turns each. Since this circuit does not start without load, a 15W incandescent lamp is constantly turned on at the output. At the same time, the illumination circuit is implemented.

The power supply fits easily into the battery case.

The design turned out to be so successful and inexpensive. that there was an idea to put the production on stream. With an abundance of cheap Chinese screwdrivers, demand will be ensured.

watch the video of reworking the screwdriver on the network with a selection of the power supply.

The screwdriver is convenient for its ubiquity. independence from limiting wires makes it possible to wade into hard-to-reach areas. A set of two power modules allows you to power one of them while working with the other. However, each battery pack has a finite number of charge / discharge periods, failing once they are used up. In inexpensive tools, blocks break faster, and the user receives a gadget with a working motor, but no power. Then the dilemma arises “is it possible to connect the screwdriver directly to the charging”.

You can feed such a screwdriver by connecting it to the network through a power supply unit, because its motor operates at 220 volts.

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:

    External power supply. The idea is not as absurd as it might seem. Even a large and heavy buck rectifier can just stand near the outlet. You are equally tied to the power supply, and to the stuck mains plug. And the low-voltage cord can be made of any length;

Accordingly, the 12-19 volt power cord should have a larger cross section than 220 volts.

Other ways to supply power

On our own

For users with special knowledge and skills, there will be no difficult problem “is it possible to power a screwdriver from a charger without special means”, because assembly of the feeding block is possible with your own hands. Instead of damaged elements, a power module assembled according to the scheme is inserted into the case. The outgoing voltage is monitored, the wires are powered, the case is locked.

Tip: the circuit may require additional load, it can be ensured by including a 15W light bulb in the system, which will also provide backlight.

DIY screwdriver alteration

Consider the option with a remote power supply

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, it means 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.

Using a car battery charger.
The principle is the same as using a computer power supply. It is necessary to purchase an old charger for the starter batteries. The modern fashion for compact impulse chargers has left analog linear devices with manual control of voltage and charge current behind board. Therefore, such a device can be purchased on the automotive market for a symbolic cost.

It’s good if the voltage can be adjusted smoothly. in this case, your makeshift power supply will fit any screwdriver. Converting it to a power tool is reduced to connecting the input of the electric motor to the power terminals of the charger.

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 of 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.

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

How to make a screwdriver powered from the mains. We use an old battery

The other end of the wire, as you already understood, connects to the screwdriver itself. For convenience, we will use an old battery. Here you cannot do without a soldering iron, since the “crocodiles” will constantly fly inside the case.

Pre-disassemble the battery and remove the insides. Materials are toxic, so be sure to use skin and respiratory protection.

Next, clean the inside of the case. To do this, rinse it with a weak mixture of alkali and water, then rinse it with clean water. Let the plastic dry and you can solder the ends of the wire. Remember to consider the polarity of the device.

Before soldering, pass the cable through the pre-drilled hole in the bottom of the battery case, that is, in the handle. It is desirable to fix the wire inside. Use duct tape. It will perfectly secure the cord inside the screwdriver.

Preparation and the first stage of changing the power supply of the screwdriver

The first step is to solder the metal conductors of the wire to the charging terminals. The soft cable has copper conductors. Terminals are usually brass.

To solder such materials together, pre-treat them with acid. The craftsman uses special solder for this process, but practice shows that ordinary rosin will also work.

The process is quite simple, although many owners still manage to make it easier for themselves. They use crocodiles to connect the contacts. We still recommend using a soldering iron for greater reliability of the device.

What you need to rework a screwdriver

The whole process is quite simple, if you have at hand a good instruction, a set of necessary materials and tools.

Namely, you will need:

  • Native device battery.
  • Serviceable charger.
  • Stranded wire. Desirable soft.
  • Soldering iron and rosin.

You need good drills to get the most out of your tool. You can buy them inexpensively online. For example, on the Aliexpress website.

How to make a screwdriver from the network

All modern screwdrivers are divided into professional and home (household). It is not strange that most buyers prefer the second type, because they cost an order of magnitude cheaper.

The problem is that when used in regular standard mode, the battery of the device often fails. Replacing a fixture isn’t all that cheap.

Not every owner will be able to repair, especially if the device has broken down not for the first time, it is almost impossible to do this.

There remains one, but one hundred percent option. convert the power supply of the instrument from the battery to a 220V outlet. You just need to figure out how to make a screwdriver from the network.

How to restore the center of gravity of a converted screwdriver

The parts of the tool were calculated in such a way that the device was as convenient as possible in work. You have changed the weight of the fixture, so the center of gravity has shifted. This will bring some discomfort when using a screwdriver.

To prevent this from happening, add weight to an empty battery by inserting a weighting material into its body that is appropriate for the weight of the internals of the device. The fixture can now be connected and tested.

Self-made power supply. in fact, a simple process, but requiring special attention.

Alteration of purchased blocks

It can also be powered from any other commercial power supplies. The alteration process in this case will be almost the same, however, in addition to the resistor, you may need to solder additional diodes. The most important thing is to achieve the required output parameters. And this can be easily done using a combination of components.

Transformer

common power supplies that have proven their reliability and efficiency in many areas. The device consists of a step-down transformer and a rectifier through which the undervoltage passes. Rectifiers vary depending on the number of diodes used.

Such elements are easy to manufacture, cheap and reliable. Therefore, they are often preferred. They provide stable voltage without interference with high maximum power. But there are also several disadvantages. The main disadvantage is bulkiness, with much lower efficiency than pulsed sources. This fact requires the selection of a power supply for the screwdriver with a power greater than that required by the tool. Since part of the capacity will go to side processes.

Power supply options

Any screwdriver requires much less voltage than a regular socket gives out. Therefore, for recharge, you will definitely need a special converter, at the output of which the required voltage will be obtained. All power supplies are divided into two large groups: pulse and transformer. Let’s consider each of them separately.

Alteration of the power supply unit made in China

Excellent for creating a power supply for a 12 volt screwdriver with your own hands, ordinary Chinese power supplies with an output voltage of 24 V and a current of 9 A. But since the tools use a lower voltage, you need to lower it first.

To achieve the goal, you need to replace the original resistor R10 with an adjustable resistor, with which you can achieve the desired voltage. This is done in several stages:

  • a constant resistor is removed;
  • in its place, a previously prepared adjustable resistor is inserted, on which a resistance of 2300 ohms will be set;
  • so far, the voltage is still 24 V;
  • using the resistor settings, you need to achieve the required voltage on the contacts.

After all the manipulations, you need to check that the output voltage is the required value (12 V, 14 V, etc.), and also that the current exceeds 9 A.

How to remove the backlash of the drive shaft in the screwdriver \ Repair the network screwdriver

Converting a screwdriver to mains power: 5 ways

The value of a screwdriver as a home or construction tool, most often, lies in its portability. However, due to certain circumstances, portability sometimes has to be abandoned in favor of functionality. It is about converting a cordless screwdriver into a mains-powered tool. This process has a number of subtleties that it is advisable to observe.

How to do it yourself

Before remaking a screwdriver, it is necessary to clearly determine what power and what voltage the tool needs to work. From this it will be necessary to proceed.

Then the tool body is opened. The two halves of the case can be fastened with screws or with glue. When disassembling, a knife can be very useful.

After opening the case, a power supply or a wire is inserted inside, the contacts of which must be soldered to the charger. Soldering should be as effective as possible, using special solutions.

The other end of the wire must be designed for power supply. So there should be a fork. It is recommended to make a hole in the housing in advance through which the cable will pass.

A homemade power supply can be obtained in several ways. In any case, you will get a full-fledged tool that can be used to perform work after connecting to the network. It is advisable to pre-prepare a diagram that will help you avoid mistakes when creating a block.

We use laptop charging

An excellent option is to use laptop charging. Such devices usually operate with a voltage of 12 to 19 V. This is quite enough to ensure high-quality operation of the screwdriver. But do not neglect the output current indicators. The closer it is to the required, the better.

In this case, reworking a screwdriver for mains power is reduced to an elementary soldering of wires from the charger to the board in the tool. It is advisable to isolate everything with electrical tape or other similar materials. After that, the wire is brought out and the tool can be used.

Pulse

The principle of operation of pulse systems is that the voltage is first rectified and then converted into a special pulse signal. In this case, it is important to achieve a stable voltage. This can be helped by a transformer winding or resistors.

Switching power supplies are quite effective 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. However, in terms of power, impulse systems are clearly inferior to transformer ones. In addition, such units are very capricious to the input voltage. If it is lower than the set, then the element may simply not work.

Conversion of a screwdriver from a battery to a mains supply

  • Battery Disadvantages
  • There is a way out. reworking the screwdriver in the network
  • External power supply
  • Battery case power supply
  • DIY screwdriver alteration
  • Using a power supply from a personal computer
  • Using a car battery charger
  • Making a homemade power supply
  • AC adapter for screwdriver in battery housing
  • We build in a ready-made power supply
  • Homemade power scheme

Those who have used a cordless screwdriver have appreciated its convenience. At any time, without getting tangled in the wires, you can crawl into hard-to-reach niches. Until the battery runs out.

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.

DIY screwdriver alteration

Consider the option with a remote power supply.

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 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.

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.