Soldering iron from a syringe. Scheme, description

Free technical library

ENCYCLOPEDIA OF RADIO ELECTRONICS AND ELECTRICAL ENGINEERING
Free library / Schemes of radio-electronic and electrical devices

Soldering iron from a syringe. Encyclopedia of radio electronics and electrical engineering

Free technical library

Encyclopedia of radio electronics and electrical engineering / Ham Radio Technologies

Comments on the article

The proposed version of a home-made micro-soldering iron with a built-in desoldering device for desoldering is addressed primarily to radio amateurs and those who have to deal with the installation and removal of microcircuits, as well as low-power semiconductor devices.

The basis of the device is ... a medical syringe with a needle, which (after a slight modification) is the working body (Fig. 1). The power consumed by the heating element (again, self-made!), Does not exceed 12 watts. But it is quite enough to bring the temperature of the soldering iron tip to 300 ° C.

Rice. 1. Microsoldering iron with pneumatic desoldering when dismantling radio-electronic components (option) (click to enlarge): 1 - tubular tip, 2 - electric heating element, 3 - socket socket (tube 2x0,2, L16, made of copper foil, 2 pcs.) , 4 - socket base, 5 - steel lock washer, 6 - cap nut, 7 - housing, 8 - syringe bulb (working volume 1 ml), 9 - two-core electric cable with a plug at the end, 10 - rod with a piston, 11 - spring, 12 - contact pin (piece of copper wire with a diameter of 1,6,2 pcs.), 13 - fiberglass washer, 14 - insulator cover (tube 2x0,2, polyvinyl chloride, 2 pcs.), 15 - cable core ( 2 pcs.).

At the needle, the former (beveled) end was removed with wire cutters, the edges of the shortened part were slightly turned on an emery bar. At its other landing end, an annular groove is cut for a lock washer, designed to fix the body of the mini-socket (see Fig. 2a). The tip of the microsoldering iron thus obtained is inserted into the copper tube-base of the heating element. Its manufacturing technology is shown in Figure 2 and is not much different from that set out in 6 No. 3 of the magazine "Modeler-Constructor" for 1997. We note only the particulars.

Soldering iron from a syringe
Rice. Fig. 2. Manufacturing technology of the heating element at the initial (a), middle (b) and final (c) stages: 1 - tubular tip, 2 - tube-base of the heater (from a sheet of copper foil 3,8x32, s 0,2), 3 - spiral (nichrome wire with a diameter of 0,2, between two insulating layers), 4 - short electric heater outlet, 5 - long electric heater outlet, 6 - third insulating layer, 7 - heater body (tin, tube 7x0,3, L32), 8 - isolation of terminal conclusions.

The first insulating layer (from a pasty mixture of office silicate glue and talc in a ratio of 2:1) is applied to the base tube, followed by high-temperature (up to 150°C) drying. Then, a nichrome wire with a diameter of 12 mm is wound 0,2 mm from the edge so that a gap of 0,1-0,2 mm is maintained between the turns. The resulting spiral is rigidly fixed in the wound state, for which one end of it was temporarily passed inside the needle, and the other (short) was fixed outside (at the base) with ordinary threads. A second insulating layer was applied to the resulting workpiece, preventing the appearance of exposed coils, and dried at the same 150°C without swelling of the pasty mass. The long end of the nichrome wire, located in the needle, is brought out and, after 1,5 turns on the already caked coating, is fixed opposite the short end of the spiral, as shown in Figure 2a.

And again - the insulating layer, the third in a row. It is applied so that the nichrome leads recessed into the dough-like mass do not touch either the needle or the tube body with two side round cuts (Fig. 26).

At the final stage, the body-tube was slightly crimped at the base of the needle and carefully insulated where the future terminal pads for connecting the heating coil to the socket exit through the cutouts (see Fig. 2c).

The latter deserves special mention. Its base is made of heat-resistant plastic and has an annular protrusion. The latter is done so that during assembly the nut-cover rests against it with a shoulder, thereby holding the heating element on the body with the syringe in a clamped state

The nozzle that keeps the socket from sliding back is made of thin sheet steel. The configuration completely eliminates even accidental electrical contact with sockets rolled into the base of the socket and firmly connected (flattened) to the terminals of the nichrome spiral. So the working tool itself turns out to be removable, and several heating elements can be made - for different diameters of the needle-stings and for any voltage.

The manufacture of a housing for a syringe and a plastic nut-cap, as a rule, does not cause difficulties, as well as a mini-fork, which consists of several parts. We only note that the contact rods are two pieces of copper wire, fixed in a washer (made of heat-resistant plastic) with a square central hole. From the side of the syringe, each of the rods is welded (see Fig. 1, pos. 12 and 15) along a conductive core (electric cord tucked into a conventional plug).

The main advantage of the soldering iron is the suitability of the design for the dismantling of radio-electronic units and assemblies. All work boils down to the fact that the heated tubular sting moves onto the soldered terminal of the part to be removed (microcircuit or semiconductor device). As practice shows, the solder melts almost instantly and, when the stem of the built-in syringe is pressed, it is simply blown out, exposing both the dismantled lead itself and the micro-area around it. And so that the piston system of the soldering iron does not jam at the same time, it is recommended to lubricate the rubbing parts with glycerin in advance.

Authors: A.Naumov, V.Yashin

See other articles Section Ham Radio Technologies.

Read and write useful comments on this article.

<< Back

Latest news of science and technology, new electronics:

Artificial leather for touch emulation 15.04.2024

In a modern technology world where distance is becoming increasingly commonplace, maintaining connection and a sense of closeness is important. Recent developments in artificial skin by German scientists from Saarland University represent a new era in virtual interactions. German researchers from Saarland University have developed ultra-thin films that can transmit the sensation of touch over a distance. This cutting-edge technology provides new opportunities for virtual communication, especially for those who find themselves far from their loved ones. The ultra-thin films developed by the researchers, just 50 micrometers thick, can be integrated into textiles and worn like a second skin. These films act as sensors that recognize tactile signals from mom or dad, and as actuators that transmit these movements to the baby. Parents' touch to the fabric activates sensors that react to pressure and deform the ultra-thin film. This ... >>

Petgugu Global cat litter 15.04.2024

Taking care of pets can often be a challenge, especially when it comes to keeping your home clean. A new interesting solution from the Petgugu Global startup has been presented, which will make life easier for cat owners and help them keep their home perfectly clean and tidy. Startup Petgugu Global has unveiled a unique cat toilet that can automatically flush feces, keeping your home clean and fresh. This innovative device is equipped with various smart sensors that monitor your pet's toilet activity and activate to automatically clean after use. The device connects to the sewer system and ensures efficient waste removal without the need for intervention from the owner. Additionally, the toilet has a large flushable storage capacity, making it ideal for multi-cat households. The Petgugu cat litter bowl is designed for use with water-soluble litters and offers a range of additional ... >>

The attractiveness of caring men 14.04.2024

The stereotype that women prefer "bad boys" has long been widespread. However, recent research conducted by British scientists from Monash University offers a new perspective on this issue. They looked at how women responded to men's emotional responsibility and willingness to help others. The study's findings could change our understanding of what makes men attractive to women. A study conducted by scientists from Monash University leads to new findings about men's attractiveness to women. In the experiment, women were shown photographs of men with brief stories about their behavior in various situations, including their reaction to an encounter with a homeless person. Some of the men ignored the homeless man, while others helped him, such as buying him food. A study found that men who showed empathy and kindness were more attractive to women compared to men who showed empathy and kindness. ... >>

Random news from the Archive

Drank - come to the tester 25.07.2001

It is enough to breathe into the device, and in seconds it will report the degree of your intoxication. If the blood alcohol content is above the norm, an audible signal will sound, and a warning message will appear on the display screen of the digital tester.

The device runs on a single battery. Its size is 12x6x3,5 cm, weight - 150 g

Other interesting news:

▪ Mars is poisonous to bacteria

▪ Ceramic motor tested

▪ Konica Minolta bizhub C3, C458 and C558 A658 color MFPs

▪ Treatment of infections with electric current

▪ Bacteria produce fuel

News feed of science and technology, new electronics

Interesting materials of the Free Technical Library:

▪ section of the site Radio - for beginners. Article selection

▪ article And everything that he saw before him, he despised or hated. Popular expression

▪ article When did man start making beds? Detailed answer

▪ article Boat knot. Travel Tips

▪ article Electronic windshield wiper interrupter. Encyclopedia of radio electronics and electrical engineering

▪ article Electric octopus. physical experiment

Leave your comment on this article:

All languages of this page

Home page | Library | Articles | Website map | Site Reviews