What you need for a homemade soldering iron at 12 volts

Homemade soldering iron at 12 volts - a necessary tool for modern electronics in household use. With it, you can quickly solder the chip, the details of the micro earphone, a hand-held electronic clock, and repair the charge for the phone. Many radio amateurs prefer to make an electric soldering iron with their own hands. This work saves money and does not forget the school course of physics.

Diagram of the device homemade soldering iron from the stove

Diagram of a homemade soldering iron from the stove.

Required materials and tools

For the manufacture of a soldering iron a lot of material is not needed, and it can be easily found at home. This is a copper wire for the manufacture of directly soldering base, copper foil, tin tube (for the casing) and nichrome wire, a handle (preferably plastic), electrical cord in heat-resistant insulation, silicate glue, talc for insulating mass.

It is sometimes difficult to find copper foil. You can use foiled fiberglass. It is often used in the manufacture of printed circuits and circuit boards. If there are no such houses, you can contact the store and purchase the necessary material for 200 rubles. To get one sheet of copper foil, you need to heat the fiberglass laminate with an ordinary iron and, dividing it into thin plates, pull the corner, wind it on a round stick.

The main element is a 220/12 volt transformer, through which the soldering iron will receive energy from the mains. Often use TVK-11OL. It can be found in old tube TVs.

Refinement soldering tip

Refinement soldering tip.

The following tools are required:

  • tweezers;
  • pliers;
  • clippers;
  • plates or plates for coating with adhesive mass;
  • stove (electric or gas);
  • rags.
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Soldering iron assembly steps

The copper wire you have purchased will serve as a sting micro-soldering iron. It will take only 50 mm. It should be sharpened in the form of a dihedral angle on one side and be sure to tin edges. The finished sting will be inside the heating element.

The second step in the manufacture of a micro-soldering iron will be the preparation of a special electrical insulating mass. To do this, mix talc and liquid glass (silicate glue). Using a plate or tweezers, apply insulation to a cylindrical surface, periodically sprinkling talcum powder to prevent the mass from sticking to your hands.

Copper foil roll in a tube about 35 mm long. This will be the base of the heating element. On one side, a soldering iron tip can be seen from under the tube. This tube must be covered with an insulating mass, as in the first case. The wet mass that you inflicted must be dried over the slab until it solidifies. Now you can wind the nichrome wire on the finished base by making a spiral. Its length should not exceed 350 mm. Lay the coils need to be carefully and very close to each other, while the upper and lower ends of the wire (from 30 to 60 mm) are left as conclusions. This construction is once again covered with a mixture of electrical insulation and dried over the stove.

Soldering iron assembly scheme of a resistor

Soldering iron assembly scheme of a resistor.

Now turn the end of the wire to be bent back, firmly press it to the surface of the tube and repeat the application of the mass a third time. Only after that the heating element of the soldering iron can be considered completely ready for use.

The wire that protrudes from under the heating element should be covered with an insulating mass. At the same time, you need to be patient and, each time inflicting a mass, do not forget to check the quality of the actions performed.

When the base is completely covered with insulation, you can proceed to the assembly of a micro-soldering iron. Connect the ends of the nichrome heater with a handle. To do this, through the internal plastic cavity we stretch the electrical cord in heat-resistant insulation. Bare places need to be isolated weight and dried. After that, we put a protective tin casing on the heater and connect it to the handle. Micro soldering iron ready for use.

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Homemade soldering iron of a resistor

Radio amateurs often use the most unusual tools at hand for the manufacture of various tools. Simplicity, reliability, convenience in work - these are the technical characteristics of a self-made micro-iron.

As in the previous version, for the manufacture of a soldering iron will need copper and steel wire and double-sided PCB.

New elements will be a ballpoint pen (for the manufacture of the case) and the resistor MLT-0.5, having a resistance of 5-10 ohms.

We start work with the manufacture of the heating element. Using a scalpel or sandpaper, remove the ink from the resistor. To do this, connect it to a regulated power source. After thoroughly cleaning paint, remove one of the legs of the resistor, and use the other as a fastener and tokovod. In the part of the resistor where the leg was removed, you need to drill a hole with a diameter of 1 mm to install the soldering iron tip. After this, rezenkuyte hole with a larger diameter drill so that the tip of the soldering iron does not come into contact with the cup. With the help of the file, you need to make another circular cut for fastening the tokovod to a depth of 2/3 of the thickness.

The tokovod can be made of a well-filled spring, the rings of which should fit snugly on the cup.

The next stage of work is the manufacture of a board from a PCB. It has a wide part for soldering the tokovod and dissipating heat, the middle part for the body of the handle, a narrow part for fastening the wiring and cambric.

After these operations, you can proceed to the assembly. The spring tokovod needs to be put on the front cup. Tokovody soldered to the PCB board. They install a micro soldering iron tip from a copper wire, having previously dressed it in a piece of ceramics or mica, so that there is no current access. Now it remains to solder the wires to the board (preferably MGTF). As the battery use adjustable BP1A, 0-15V. Micro soldering iron ready for use.

The technology of soldering a homemade micro-soldering iron is no different from the one you purchased from the store. With it, you can even perform miniature soldering. It is very convenient and does not require large skills for assembly.

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