For the operation of a screwdriver, a 18 V power supply is required. These devices operate on a 220 V network. The converter is considered the main element of the blocks. To date, there are many modifications that differ in parameters and structural elements. How to make a power supply for an 18V screwdriver with your own hands? To do this, it is recommended to consider specific assembly schemes.
Models with indication
The power supply for an 18V screwdriver for mains operation with indications can be made on the basis of a wired converter. The conductivity of the element must be 4.5 microns. Capacitors are used at 5 pF. Most specialists install resistors with single-pole rectifiers. Comparators are used to stabilize the conversion process.
Universal Blocks
Making a universal power supply for an 18V screwdriver with your own hands is quite simple. First of all, it is recommended to prepare an output capacitor of 5 pF. An additional resistor is required. Converters for blocks are applied in negative direction. They can be used in a DC circuit and are well suited for a 220 V network. Experts advise installing comparators with beam adapters. They are well resistant to impulse noise. It should also be noted that the filters for the capacitor are selected with an electrode trigger. At the end of the work, the block is checked for resistance. With proper assembly, the modification should produce no more than 40 ohms.
Bipolar resistor circuit
How to make a power supply for an 18V screwdriver for mains operation? Devices with a two-pole resistor can be assembled on the basis of a transfer controller. The transducer is used as standard with a filter. The resistance of the element must be no more than 40 ohms.
It should also be noted that when assembling the block, only channel filters are used, which are installed next to the converter. When closing the circuit, the lining is checked first. Triggers are used to increase the overload parameter of the device.
Three-pole resistor device
Modification with a two-pole resistor can be added on the basis of an operational converter. As a rule, modifications to 220 V are applied. At the beginning of the assembly, a trigger is selected. Filters for it are installed channel type. It should also be noted that the conductivity of the resistor in the block should not exceed 4.5 microns. The resistance at the output of the converter is on average 40 ohms. These modifications are good in that they are not afraid of impulse noise from a 220 V network. Additionally, it is importantremember that the devices are allowed to be used with screwdrivers of different brands. If we consider blocks on wired comparators, then rectifiers are used only for two plates. Additionally, the conductivity of the comparator itself is taken into account.
Pulse modifications
Do-it-yourself switching power supply for a 18V screwdriver is assembled with integrated converters. Comparators for devices are used on two or three plates. Most models are made with low-resistance rectifiers. The element overload indicator starts from 10 A.
Some mods stack with channel filters. Also among home-made modifications, models on drive converters are often found. They have a high conductivity. Only 4 pF capacitors are suitable for them. In this case, filters are used with beam adapters. Experts say that the models are capable of working with 18 V screwdrivers.
Scheme of block with amplifier
Modifications with amplifiers are common. You can assemble a power supply for an 18V screwdriver with your own hands using a wired converter. You will also need a contactor trigger. Installation should begin with soldering transistors. They are used in different capacities, and the conductivity of the elements starts from 4.5 microns. Most experts recommend channel type filters. They do well with impulse noise. It should also be noted that one adapter for the converter is required for assembly. Directly the rectifier is installed on two plates. At the end of the work, the resistance on the block is tested. The specified parameter averages 45 ohms.
Zener diode devices
On a zener diode, a do-it-yourself power supply for a 18V screwdriver is assembled with contact converters. Rectifiers may be used with electrode adapters. At the same time, their conductivity must be no more than 5.5 microns. Controllers are often found on three plates.
Filters for them are suitable for channel type. There are also assemblies with a simple inverter converter. They are allocated a stable frequency, but cannot be used in the AC mains. An insulator is installed at the output of the converter. A comparator for modification will be required with a duplex filter.
Single filter model
How to make a power supply for an 18V screwdriver yourself? Assembling a model with one filter is quite simple. It is worth starting work with the selection of a high-quality converter. Next, to make a do-it-yourself power supply for an 18V screwdriver, a three-pin trigger is installed. In this case, the filter is mounted behind the converter. The stabilizer is suitable only for the low-resistance type, and its reducibility must be no more than 4.5 microns. After installing the filter, the resistance on the block is immediately checked. The specified parameter averages 55 ohms. Triodes for the device are suitableunidirectional type.
Modifications without stabilizers
There are many homemade devices without stabilizers. The conductivity of blocks of this type is about 4.4 microns. The converters in this case are subject to impulse loads from the 220 V network. It must also be remembered that the devices are heavily overloaded from wave interference. If we consider modifications on dipole triggers, then they have only one adapter. Additionally, it is worth noting that the filter is installed behind the converter. The lining under it is soldered at the exit. Experts say that the thyristor can be used with low conductivity. However, the resistance in the circuit must not fall below 45 ohms.
If we consider devices on wire capacitors, then capacitors of 3.3 pF are selected for models. They are installed only with channel filters, and the conductivity of blocks of this type is approximately 50 ohms. In order to independently assemble the devices, contact diode rectifiers are used. Their conductivity coefficient averages 5.5 microns.
