To solder the terminals of any electrical component on the tracks of a printed circuit board (PCB), a welder with a power of 15 - 25 watts is sufficient.
Solder Wire is an alloy composed of pure tin and lead, the percentage of which is indicated on the packaging always with two numbers, for example 60/40 - 50/50 - 33/67.The first number indicates the tin content. The second number indicates the lead content, in the electronic field, the 60/40 type is the most commonly used, this tin melts at a temperature of around 190 - 195 degrees.
The solder wire to be used in electronics is available in wire with two different diameters: the most common type has a diameter of 2 millimeters, the most professional one has a diameter of 1 millimeter.
Rather than applying solder to the soldering iron you should heat the part and then touch the solder to the heated part, letting it flow over the connection on which you’re working. After the connection is well coated you’ll remove the solder before removing the soldering iron. Let the connection cool completely.
You should always solder in well-ventilated workspaces. You never want to inhale solder smoke, especially if it’s lead solder as a result of its toxicity. It’s best to use protective equipment as well because molten solder can splatter; use goggles or safety glasses.
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