Working principle of efficient and multifunctional electric soldering iron
Working principle of high-efficiency multifunctional soldering iron
The control circuit of the soldering iron is shown in the above figure. The IC (CS929) in the picture is an integrated circuit block specifically developed for this type of soldering iron, which contains circuits such as power control and signal detection. The names of the pins at each end of the integrated block are also given in the figure. One end of the 220V AC power supply is input to the power control circuit inside the integrated circuit through pin ④ of lC, and then sent to the soldering iron through pin ⑤ and an external potentiometer W. Changing the resistance value of W can change the output power.
The ⑦ pin of the IC is the input terminal for the detection signal. When the switch K with a DC power supply of 3V is turned on, the detection signal input from the ⑦ pin is amplified by the internal circuit, and then output from the ② and ⑧ pins. Based on whether the output signal can drive the light-emitting diode to emit light, the quality of the capacitors, resistors, diodes, transistors in the circuit, as well as the on/off status of the circuit can be judged.
The advantages of efficient and multifunctional soldering iron
1. It has adjustable power and 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 solder joint and the ambient temperature, to prevent overheating of the soldering iron tip, reduce the generation of oxide layer, thereby increasing the soldering ability of the soldering iron tip, improving the quality and welding speed of the solder joint, and also playing a role in saving electricity and extending the service life.
3. In actual welding operations, it often involves pre checking the continuity of wires, the quality of components, the presence or absence of alternating current, and so on. At present, there is no electric soldering iron with detection function. This soldering iron has multiple testing functions and is an electrical tool that integrates detection and welding.
