Homemade method of electric soldering iron:
Remove the inductance and capacitance of the red circle in the circuit
The red color is the modified part. The production process is described below.
1. Use a paper clip to make the welding head.
2. Find a suitable high-frequency transformer, which can bypass the primary 100åŒ, with a wire diameter of about 0.2mm; the secondary one, with a diameter of about 1mm, multiple parallel copper wires are for temporary testing, and there will be actual Production process.
3. After testing, it is in line with the expected results.
4. Find a micro switch, make a handle, and find some copper wire with a diameter of about 1mm.
5. Install the switch and circuit in the handle. Wind the secondary of the high frequency transformer.
6. Connect the high frequency transformer secondary to the tip.
7. Finished.
Editor in charge: Zhao Hongli
Unsaturated polyester resin is a polymer obtained by the polycondensation reaction between polyacids and polyalcohols. The development of water is the by-product of this polycondensation process. Specifically, the Unsaturated polyester resin, also known by the English acronym UPR, is an easily printable liquid polymer which, once cured (cross-linked with styrene, by the use of particular substances, organic peroxides, named hardeners), keeps the solid shape taken in the mold. The items so realized have exceptional strength and durability characteristics. Unsaturated polyester resins are mostly used in combination with reinforcing materials such as glass fibres, that give life to the FRP (an acronym deriving from the English), a polyester reinforced with glass fibres, better known with the name of fiberglass.
Unsaturated polyester resin
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