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Latest News

Adapter switching power supply2021/06/25
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.
Principle of IPL photorejuvenation hair removal instrument2021/06/22
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.
Principle of IPL photorejuvenation hair removal instrument2021/06/22
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.
Three anti-paint function on PCBA circuit board2021/06/16
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:
The most stable charger PCBA design2021/06/11
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.
New USB small fan PCBA solution2021/06/09
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.
Bulb mirror PCBA control board2021/06/04
Bulb mirror PCBA control board Changsen developed light bulb mirror function sharing 1. Power supply mode: DC12V power adapter 2. One touch button input, one PMOS output 3. It doesn't work when power on, touch once to turn on the LED, touch once to turn off the LED, and cycle in turn 4. Touch backlight indicator: two blue and red indicator lights: the main light does not work when the power is on, the red indicator light is on, touch it, the red indicator light is off after the main light is on, and the blue indicator light is on; the blue indicator light is in the same direction as the main light, the main light The light is on, the blue indicator is on, the main light is off, the blue indicator is off
The most stable TWS headset solution2021/06/01
The TWS headset can complete the following functions: ① Support automatic power-on (the headset goes out of the box to turn on, and the box is turned off) and manual power on (button control) ② Voice prompt tone, such as “POWER ON” when the opportunity is turned on ③ Support the pairing and interconnection of earphones and mobile phones, and the Bluetooth distance is 360 degrees without obstacles and any angle of 10 m ④ The left and right ears can be used alone or together, of which the right ear is the main ear ⑤ Audio and video control, answer/reject/make a call, wake up the voice assistant ⑥ Low power consumption function, 80% maximum volume call power consumption is less than 10 mA ⑦ Real-time monitoring of battery voltage, low battery warning, automatic shutdown of ultra-low voltage ⑧ When the product is charging, the red LED light of the headset is always on when charging, and the red LED light is off when the charging is completed
What are the functions of the lithium battery protection board PCBA?2021/05/28
t are the functions of the lithium battery protection board PCBA? The lithium battery protection board PCBA is a protection for the charging and discharging of series-connected lithium battery packs. When fully charged, it can ensure that the voltage difference between the individual cells is less than the set value (generally ±20mV), realize the equal charge of the individual cells of the battery pack, and effectively improve the charging effect in the series charging mode. At the same time, it detects the overvoltage, undervoltage, overcurrent, short circuit, and overtemperature status of each single battery in the battery pack to protect and extend the battery life. Under-voltage protection prevents each single cell battery from being damaged due to over-discharge during discharge. How much do you know about the PCBA function of lithium battery protection board? Changsen made a comprehensive analysis for everyone:
Bluetooth headset waterproof technology2021/05/21
①Three anti-paints Three-proof paint is also called circuit board protection oil, coating oil, waterproof glue, insulating paint, and moisture-proof paint, mainly through brushing, dipping, spraying and other methods on PCBA circuit boards. ②Nano coating Circuit board nano waterproof coating is a new nano material, also called nano coating, which is currently an ideal substitute for three-proof paint. Its thickness is only 2-4 microns, which is invisible to the naked eye. It forms an extremely thin film on the surface of the PCBA, which effectively reduces the surface energy of the PCBA, forms a lotus leaf effect, has good heat dissipation performance, and does not affect the normal conductivity of the connector. The nano nano coating can reach IPX7 water resistance, corrosion resistance, and acid, alkali and salt resistance.
A new artifact of wireless charging, which can also be charged in the hand.2021/05/19
Wireless charging, everyone is familiar with it, round, square, vertical and so on. However, although it is convenient to charge and use, whether it is horizontally, horizontally, or vertically, it can only be charged in a fixed place. Charging can no longer be happily playing with the phone, and there is no freedom at all.
Digital Type-C Headphone PCBA Electrical Performance Automated Test System2021/05/05
The digital Type-C audio automatic test system adopts the high-performance two-channel audio analyzer A2 independently developed by Changsen, and cooperates with the second-developed electrical performance automatic control test software ABTEC-9800S, and related test fixtures to realize the digital Type-C headset Automatic test of electrical performance of PCBA and Type-C to 3.5mm patch cords.
China professional small fan PCBA solution factory2021/04/30
China's very professional development and production one-stop factory-Changsen, shares the working principle of the small fan PCBA from a professional perspective: the energized coil rotates under the force of the magnetic field. Electricity is converted into mechanical energy. The small fan has two engines with only a pneumatic linkage system and concentric-shaft rotors called dual-rotor turbofan engines. Its working principle and structural characteristics are basically the same as those of a dual-rotor turbojet engine.
Wireless charger PCBA board solution that meets QI standard,2021/04/27
The era of wireless charging has really come,2021/04/21
Speaking of wireless charging, many people who haven't used it think it's amazing, but those who have used it have different understandings, and some think it is more troublesome, and it has to have the best effect. Studies have shown that if we do not align the mobile phone with the wireless charging board coil, it may take longer to charge and heat up for a longer time, which will affect the battery life of the mobile phone. In other words, it is better to align on the one hand, and it is also very troublesome on the other. At this time, a charging board is the best. Here, you have experienced a smart tracking wireless charger of Xiaomi, which has a motor and sliding mechanism inside, which can move the coil to the wireless charging position of the mobile phone, which is more convenient.
Wireless charging PCBA solution type introduction2021/04/21
Shangsen currently has three types of highly integrated wireless charging PCBAPCBA solutions. The first is the SoC solution, which is simply integrated MCU and driver devices; the second is the power full-bridge solution, which integrates the driver and MOS, and works with MCU master control. To use. And with the needs of market development, the wireless charging PCBA power bank market has gradually emerged, so a third brand-new highly integrated wireless charging PCBA power bank solution has been derived. The three highly integrated solutions all have the advantages of simple peripherals, low BOM cost, and ease of rapid development and marketing.
Changsen's new development and production of small fan PCBA, affirmed by users2021/04/19
Changsen's new development and production of small fan PCBA, affirmed by users2021/04/19
Mobile phone wireless charger PCBA solution2021/04/19
Lithium battery protection board PCBA repair method2021/04/19
Three-speed handheld fan PCBA IC chip2021/04/15
Changsen PCBA production cycle and quotation2021/04/15
changsen
How much do you know about Bluetooth headsets？2021/03/27
A Bluetooth headset is a bluetooth technology applied to a hands-free headset that allows the user to talk easily in any way without getting stuck in an annoying wire. Bluetooth headsets have been a great productivity tool for mobile business people since their inception.
Five tips for choosing Bluetooth headset.2020/10/16
First, check compatibility.When choosing a Bluetooth headset, the most important question is whether the phone is compatible with the headset.

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