How to convert a 220 screwdriver

The basis is a power supply from a computer

If there is a desire to refine your design, that is, hide it in another case, drill holes for air flow to prevent overheating of the power supply unit.

Why remodel?

A new screwdriver battery sometimes costs the same as a new tool

On a note! The average battery life in a screwdriver is about 3 years. After that it needs to be changed.

• Unscrew the power supply case. Under the case, you will see a fan, a board, and a lot of wires that go from the board to the connectors.
• It is required to remove the protection against switching on. To do this, you need to find a 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.

Power supply manufacturing options

Powered by car charger

Next, we find on the nameplate (or in the instructions) the power supply of the screwdriver. The most common twelve volt. What is good for us. there are also a lot of 12 volt power supplies. But the supply voltage of your screwdriver may be higher, which can significantly complicate the search for a suitable power supply.

What are the advantages of rework

It should be borne in mind that the cord from the external power supply to the power tool must be, according to Ohm’s law, a larger section than directly from the 220v network.

As you know, professional screwdrivers are more expensive, but this is not accidental. They are made with a large margin of safety, for which higher quality and more expensive materials are used. In addition, they have more power, which makes it possible to screw in longer screws and / or work with tougher materials.

Conversion of the cordless screwdriver for mains operation

Let’s figure out how to power the cordless screwdriver from the mains

• assemble the power tool, be sure to check its performance after.

We use laptop charging

How to convert a 12 volt screwdriver to 220 volts

Let’s figure out how to power the cordless screwdriver from the mains

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 is 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.

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 it is expensive to buy a new battery, 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!

Why convert a cordless screwdriver to a network?

Battery-charged equipment periodically discharges if left unused. 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.

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

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

Screwdriver alteration process

reconstruction based on 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.

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 describe in detail how to implement our plans in all three ways.

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

(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 220 V cordless screwdriver

Over time, the battery of a cordless screwdriver wears out and needs to be charged more and longer. In order not to change it, you can transfer the instrument to mains power supply, thereby ensuring its uninterrupted operation. With a power supply, this can be done in literally half an hour.

Main materials:

• 12 V power supply. http://ali.pub/45tmu2;
• polypropylene pipe 20 mm;
• insulating tape;
• cable.

For everything to work correctly, it is important to choose a power supply that matches the parameters of a specific screwdriver model. In this case, the AIDA BSh 12 PRO unit for 12V is used. Any analog can also be used. When choosing a unit, it is necessary to look not only at its operating voltage, but also the maximum load current. Ideally, if it is at least 30A. If the current turns out to be less, then the screwdriver will not have enough torque or the block protection will start to operate under load.

Alteration of a 220 V screwdriver

To transfer the power of the screwdriver from the battery to the network, you need to get to its power contacts. To do this, you need to disassemble the battery case. The batteries present in it are removed.

Since the contacts of the batteries remain on the removed batteries, in order to return them to the case, it needs to be revised. To do this, I cut 2 short tubes from the 20th polypropylene pipe. They must be the same length as the removed battery pack. It is necessary that the pieces fit into the battery housing of the screwdriver.

Most likely, one of the edges of the tubes will have to be cut a little, since it will rest against the protrusions on the lid.

Next, you need to remove the contact plates from the batteries and rearrange them on the tubes. So that they fit tightly, each tube should be wrapped with electrical tape, thereby increasing the bore diameter. After that, a cable of a convenient length is soldered to the contacts, and they are finally fixed on the tubes.

Now you need to connect the cable from the screwdriver terminals to the power supply wire. The polarity is important here. The plus of the block must connect to the plus terminal, and the minus to the minus terminal. For reliability, it is better to solder the twist. Its insulation can be made with electrical tape or heat shrink.

Further, the contacts with the tubes fit into the battery case. To do this, a side hole is made in it right at the junction with the cover for entering the wire. To prevent the tubes with contacts from moving or falling out, everything is fixed with hot melt glue. For reliability, it can also be applied to the junction of the case with the lid so that it does not open.

Now, when the power supply is plugged into an outlet, the screwdriver can operate on the mains for as long as necessary without recharging.

The best option for powering a battery-powered screwdriver from the mains

What is available for reworking a screwdriver in our case? Laptop power supply 15 volts, 6 amperes. There is also a computer power supply unit, slightly altered, conclusions are drawn, but there are no changes in the scheme. Power supply from a halogen lamp. Lamp power 12 volts, 50 watts. There is a charger for car batteries with a current regulator. It will be used both as a power source and as a separate ammeter.

So let’s get started. Let’s start connecting directly from the power supply. The pins are already connected. 12 volts, idle. 3 amperes. Maximum ratchet. As you can see on the device, the current reaches 8 amperes.

Trying a laptop PSU for fifteen volts, six amps. No-load current 4 amperes. In ratchet mode, the maximum current is 9 amperes, the voltage is 14 volts. It turns out that the 6-amp power supply copes with this task.

The turn of the computer unit has come. It easily withstands the load.

A practical example of the work of a screwdriver from a computer power supply

At work there are two screwdrivers, they were purchased and with everyday use the batteries lost their capacity and it is already useless to charge them, they sit down very quickly. We tried to remove the battery to reanimate, it did not work out and had to make a power source and work on it in the workshop. So, we check how the screwdriver will show itself when working from a network with a computer power supply.

A block from an old computer was taken as a basis. It is 220 volts. They brought out a wire with a connector to insert into a screwdriver. Convenience is that the device has a switch and an indicator. The power reserve is sufficient. 2.5 meter wire.

We will test it at work. Drives screws very well, drills holes.

It took about 1.5 hours to rework the unit. The test showed that the power reserve is sufficient for screwing screws into pine, chipboard. Let’s try to drill a hole. As you can see, everything works. There are no overloads, smoke, etc.

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.

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.

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 indicating 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 chip, 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’s 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
And 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. The 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.

How to convert a screwdriver to a 220 volt network

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.

What is needed for rework

In the process of work, you will need:

• charger included with the cordless screwdriver;
• electric cable (multicore);
• worn out battery.

In addition to the above, it is necessary to prepare an insulating tape, a screwdriver, a soldering iron, solder and phosphoric acid for soldering.

The benefits of rework

The home craftsman rarely uses fitting and assembly tools. The cordless screwdriver lies idle for a long time. And during this period, an arbitrary discharge occurs in the power source, which leads to changes in the internal design.

Having remade a 220 Volt screwdriver, the home craftsman gets the following advantages:

• no time-consuming charging required;
• storage does not entail violations in the design of the tool;
• mains supply provides constant torque.

The minus of the converted screwdriver is one: binding to the mains.

Important! A battery that has been disassembled and removed from the housing must not be thrown into the trash can. It is disposed of in specialized services.

Step-by-step instruction

The procedure is as follows:

• Disassemble the battery: unscrew all the screws hidden under the stickers. The batteries inside are interconnected. Two wires fit to them: red and black (-).
• Cut off the wires from the batteries. It is necessary to cut off from the elements, and not from the battery contacts.
• Connect the wire to the open contacts of the charger by soldering, after pretreating the brass terminals with phosphoric acid. This will ensure a reliable connection between brass and copper cable.
• Insulate the joints.
• In the case where the batteries were located, insert a weight as a counterweight.
• Solder the battery leads inside the case to the free contacts of the cable, observing the polarity. If polarity is reversed, the tool will work but rotate in the opposite direction.
• Connect the plug to the network and check if it works.
• Additionally, make a hole for the wire in the screwdriver body on the left side. To ensure a snug fit, make a “lock” of duct tape.

How to remake a 220 volt screwdriver correctly

When the batteries fail, you have to think about how to remake a 220 volt screwdriver. Replacing an energy source is sometimes too costly and troublesome. Some types of batteries are almost impossible to find on sale.

• The benefits of rework
• What is needed for rework
• Step-by-step instruction
• Power supply recovery

Power supply recovery

If the power supply is inoperative, external sources are suitable for replacement:

• power supply unit from a PC or laptop;
• car charger;
• homemade power supply.

Alteration of power supplies from any other devices consists in connecting a low-frequency cable to the charging outputs. Reliable and durable operation will be provided by a power supply with a capacity of 300. 350 watts.

Laptop chargers with an output voltage of 12 to 19 volts are suitable for resuscitation of the instrument. In this case, remove the output plug, strip the wires and solder to the cable of the required length.

A reliable option for long-term work will be a power supply from a computer. Its advantages are the presence of a cooler in the design, which prevents overheating of the transformer.

It is quite simple to remake a 220 volt screwdriver. The procedure does not require material costs. The converted tool will last more than one year, provided that the master does everything correctly.

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Assembling a serviceable battery from two that have lost capacity

Two faulty devices can be assembled into one serviceable.

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

Using an external power supply

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

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

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

Screwdriver battery design

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

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

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

Finding faulty items

The storage battery is assembled from individual cells. They do not fail at the same time, but even one defective element degrades the performance of the entire battery.

To determine the parts that have lost their capacity, it is necessary:

• charge the battery;
• work until power loss;
• disassemble the battery;
• measure the voltage on each element separately.

Batteries with noticeably less voltage or no voltage at all must be replaced.

Built-in power supply in the battery case

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

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

Alteration of a screwdriver for power supply from a 220V network

If the battery fails and it is impossible to repair it, the only way out is to convert the cordless screwdriver into a network.

In this case, the power of the power supply unit must exceed the power of the motor, taking into account possible overloads at the time of the completion of tightening. It is not indicated in the passport of the device, but this parameter is written on the body of the electric motor, or it can be calculated by connecting the device to a constant voltage source through an ammeter. For a 70W motor, a 120W power supply is sufficient.

Important! The charger is not powerful enough to operate. When converting a cordless screwdriver into a 220 volt mains screwdriver, you must use a different power supply.

How to make a homemade power supply

In addition to the purchased one, the power supply can be made independently. This requires a 160W transformer, such as were installed in tube TVs.

First of all, you need to determine the required number of turns. The procedure is as follows:

• disassemble the transformer;
• unwind all secondary windings from the coil;
• wind 10 turns of wire;
• assemble the transformer;
• connect to a 220V network;
• measure the voltage on the secondary winding;
• divide the number of turns (in this case 10) by the measured voltage.

The resulting value is multiplied by the supply voltage of the screwdriver and the required number of turns is obtained.

Attention! The number of turns per volt can be obtained by measuring the voltage and counting the turns in the secondary winding.

The lowering winding is wound with a wire with a cross section of 1mm² to reduce the voltage drop in the transformer.

There is an alternating voltage at the output of the transformer, and the device needs a constant one, therefore, a diode bridge is installed in addition to the transformer. It is assembled from diodes on radiators, with a voltage of more than 20V and a current of 10A. It is mounted together with a transformer or in a battery case, from which the elements are removed.

Conversion of a screwdriver to mains power

A screwdriver is a tool designed for driving screws and drilling small holes. There are mains, powered from a 220V network and rechargeable, with two replaceable batteries.

If the battery in such devices fails, then there are three options:

• replacing the battery is expensive, in a budget class device the price of a set approaches the cost of a new device;
• repair is not always possible, and in some cases its cost is comparable to the cost of new batteries;
• conversion of a cordless screwdriver to a network.

This article describes how to power a screwdriver from a 220v network, or how to make a network out of a cordless screwdriver.