It is modified on the basis of electric soldering iron. It can be used for both alternating current and direct current. If alternating current is used as the power supply, a diode must be added to the line. If direct current is used as power supply, 300W electric furnace wire is wound on the inner core magnetic tube for 6 ~ 8 turns.
The skill used is to be steady and smooth, which is actually similar to our normal writing with a pen, but it is a process of practice making perfect. Very simple, as long as you practice often, you can achieve satisfactory results!
Have a happy day! ! !
Ha, ha, ha, the one you said is called an electric soldering iron!
It is very simple to use. First, put the thread to be welded directly on the solder wire (because the solder wire is hollow with solder paste in the middle. If solder paste is used directly without solder, you need to put the thread head in solder paste or rosin and heat it with an electric soldering iron to make the thread head have solder paste or rosin, otherwise it is not easy to stick solder), so that the thread head can be bonded with solder, and then weld the thread head with solder paste where you want to weld. If the solder joint is uneven, paste the soldering iron directly. Don't move your other hand when the soldering iron leaves the solder joint. Don't let go before the solder is completely solidified, otherwise the solder joint will be empty easily! Why don't you try? Very simple (note: don't solder too much, if the solder joints of electronic components are very close, it is easy to solder by mistake)