• A:Adapter power supply for laptop HA65NS2-00, input voltage range: 100~240VAC; output voltage is 19.5VDC, maximum working current is 3.34A; rated output power is 65W. We can decompose the circuit diagram into several parts: Electromagnetic interference suppression circuit and input rectifier filter circuit: The electromagnetic interference suppression circuit is composed of L1, R1A, R1B, CX1, L2 and a differential mode and common mode low-pass filter to suppress the electromagnetic interference generated by the switching power supply; BD1 and C1 form a bridge The rectifier filter circuit provides smooth DC power for the power conversion circuit.

  • A:The strong light of IPL photon hair removal is a therapeutic light with a wavelength from 755nm to 1200nm, which has multiple effects at the same time. Hair removal lasts longer than traditional hair removal methods. While hair removal, the skin can only be relatively better. ipl is the contraction of strong pulsed light. The photon hair removal surface skin can be absorbed by the hair follicles in the particles to generate heat energy and destroy the hair. The photon hair removal results in permanent hair removal. At the same time, it can also make the fibers and elastic fibers of the fiber layer produce molecular structure chemical changes to promote skin regeneration and growth.

  • A:The strong light of IPL photon hair removal is a therapeutic light with a wavelength from 755nm to 1200nm, which has multiple effects at the same time. Hair removal lasts longer than traditional hair removal methods. While hair removal, the skin can only be relatively better. ipl is the contraction of strong pulsed light. The photon hair removal surface skin can be absorbed by the hair follicles in the particles to generate heat energy and destroy the hair. The photon hair removal results in permanent hair removal. At the same time, it can also make the fibers and elastic fibers of the fiber layer produce molecular structure chemical changes to promote skin regeneration and growth.

  • Under real conditions, such as chemical, vibration, high dust, salt spray, humidity and high temperature, PCBA circuit boards may have corrosion, softening, deformation, mildew and other problems, resulting in PCBA circuit board circuit failure. PCBA circuit boards produced by Changsen are basically made of three-proof paint, what function does the three-proof paint have? Here is a brief introduction:

    2021-06-16

  • With the rapid development of electronic technology, PCBs (printed circuit boards) for designing electronic products can no longer meet the needs of electronic technology development. With the development of electronic technology, electronic circuits are becoming more and more complex, requiring designers to continuously improve their design level. Produce more PCBA products.

    2021-06-11

  • The small USB fan PCBA independently developed by Changsen will be updated and upgraded. The detailed analysis is as follows: 1. All three positions of the USB fan can work when there is no battery. Compared with the first-generation product, the wind power is too small, and the switching is greatly improved. The new USB small fan PCBA solution is battery-free, and it can be connected to a computer or mobile power supply via USB, and all three gears can work. 2. The battery is reversed. The current 18650, the positive and negative poles are extremely difficult to identify. The first-generation product, the battery is installed reversely, may burn the board. The new USB fan PCBA solution will have a protection circuit even if the battery is installed reversely.protection circuit is good, and no burn-in occurs.

    2021-06-09

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