The working principle of an efficient and multifunctional electric soldering iron
A high-efficiency multi-functional electric soldering iron, which uses a special integrated circuit as a control circuit, can make the power of the electric soldering iron continuously adjustable between 0 and 50W, and also has a variety of detection functions. This electric soldering iron integrates the functions of testing and welding, and has the characteristics of high efficiency, energy saving, and extended life.
The working principle of an efficient and multifunctional electric soldering iron
The control circuit of this soldering iron is an integrated circuit block specially developed for this type of soldering iron. It contains circuits such as power control and signal detection. The figure also gives the name of each terminal pin of the integrated block. One end of the AC 220V power supply is input to the power control circuit inside the integrated circuit through pin ④ of IC, and then sent to the soldering iron through pin ⑤ and the external potentiometer W. Changing the resistance of W can change the output power.
The ⑦ pin of the IC is the input terminal of the detection signal. When the switch K of the DC power supply 3V is turned on, the detection signal input by the ⑦ pin is amplified by the internal circuit and then output by the ② and ⑧ pins. Depending on whether the output signal can drive the light-emitting diode By emitting light, you can judge the quality of capacitors, resistors, diodes, and transistors in the circuit, as well as the continuity of circuit lines.
Advantages of efficient and multifunctional soldering iron
1. With adjustable power, one soldering iron can replace three commercially available soldering irons of 20W, 30W and 50W.
2. The power can be changed at any time according to the size of the welding piece and the ambient temperature to prevent the soldering iron tip from overheating and reduce the formation of the oxide layer, thereby increasing the tin-eating ability of the soldering iron tip, improving the quality of the welding piece and the welding speed, and at the same time It plays the role of saving electricity and extending life.
3. Actual welding operations often involve pre-detection of the continuity of wires, the quality of components, the presence of alternating current, etc. For this reason, there is currently no electric soldering iron with a detection function. This soldering iron has a variety of testing functions and is an electrician's tool that integrates detection and welding.
