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Latest News

Fascia gun PCBA scheme2022/04/16
USB: type-C and micro 5V input charging and discharging, and the nixie tube monitors and displays the power in real time; Set three touch keys, power key (middle), increment key + (left), decrement key - (right); Add and subtract key, press once to add or subtract 1, and long press to quickly increase or decrease;
PCBA welding processing requirements2022/04/14
PCBA welding processing usually has many requirements for PCB board, which must meet the welding requirements. So why does the welding process require so many requirements for circuit boards? Facts have proved that there will be many special processes in the process of PCBA welding, and the application of special processes will bring requirements to PCB.
How much do you know about quality responsibilities2022/04/13
QA activities run through the whole process of project operation; QC activities are generally set at a specific stage of project operation, and may be completed by different roles at different control points. For competent QA, tracking and reporting findings during project operation is only the basic part of their job responsibilities. More valuable work includes providing process support to the project team, such as providing cases and reference data of previous similar projects for the project manager, introducing and explaining applicable process definition documents for project team members, etc. QC's activities are mainly to find and report product defects. Me: Equipment Engineer; Organization Engineer Ie: Process Engineer QE: Quality Engineer Te: Test Engineer RD Engineer: Rd refers to the research and development engineer, generally in electronics, software industry, other industries, such as plastic products unit and electrical factory
What do you know about the responsibilities of engineers2022/04/12
PE: Product Engineer generally means engineering manufacturing and production technology. Me: Equipment Engineer; Organization Engineer Ie: Process Engineer QE: Quality Engineer Te: Test Engineer RD Engineer: Rd refers to the research and development engineer, generally in electronics, software industry, other industries, such as plastic products unit and electrical factory
PCBA test sharing2022/04/09
CBA test is the most critical quality control link in the whole PCBA processing process. It is necessary to strictly follow the PCBA test standard and test the test points of the circuit board according to the customer's test plan. PCBA test also includes five main forms: ICT test, FCT test, aging test, fatigue test and test in harsh environment.
PCB wiring tamper control2022/04/09
Crosstalk refers to the mutual interference caused by long parallel wiring between different networks on PCB, which is mainly due to the distributed capacitance and distributed inductance between parallel lines. The main measures to overcome crosstalk are: Increase the spacing of parallel wiring and follow the 3W rule. Insert a grounded isolation line between parallel lines. Reduce the distance between the wiring layer and the ground plane.
Rules and requirements for PCB wiring2022/04/08
Avoid walking different signal lines in the same direction in adjacent layers, so as to reduce unnecessary inter layer interference; When it is difficult to avoid this situation due to the limitation of board structure (such as some backplanes), especially when the signal rate is high, it should be considered to use the ground plane to isolate each wiring layer and the ground signal line to isolate each signal line.
PCB wiring priority requirements2022/04/08
Priority of key signal lines: Key signals such as power supply, simulated small signal, high-speed signal, clock signal and synchronization signal are preferred.
Solar street lamp PCBA scheme2022/04/06
PCBA street lamp is composed of six components: solar panel, solar controller, solar battery, lamp pole, lamp source and accessories. Energy transfer smart solar street lamp solution can provide PCBA board of solar controller or a complete set of street lamp solution.
Function description of mobile power warm hand treasure PCBA2022/04/02
Power indication function; Overcurrent protection function; Overvoltage protection function; Short circuit protection function; Standby low power consumption; Automatic shutdown without load; Lithium battery protection function; 2A charge and 2A discharge; Constant temperature function.
PCB shape design2022/04/01
PCBA processing and production quality and efficiency are closely related to the design method of PCB circuit board itself. Good design can solve the problems of processing and production quality, efficiency and even cost. If the PCB design is not standardized or the problems are not considered comprehensively, it will seriously affect the production quality and efficiency, and directly or indirectly lead to the improvement of production cost.
Small fan PCBA scheme2022/03/30
The principle of small fan is that the energized coil rotates under force in the magnetic field, and the electric energy is transformed into mechanical energy. The small fan has two engines with only pneumatic linkage and concentric shaft rotor, which is called double rotor turbofan engine. Its working principle and structural characteristics are basically the same as those of double rotor turbojet engine. The design and development of Xiaofeng PCBA scheme is completed by brushless motor and main control chip:
Solution of ice making machine not making ice2022/03/29
What to do if the ice maker doesn't make ice? Based on many years of experience in the development and production of PCBA ice maker, we share the following with you. I hope we can help you
How to choose solar panels?2022/03/27
Solar street lamp is a comprehensive system. All components should be reasonably configured according to parameters to achieve the best use of solar street lamp. In addition, we should not only pay attention to the solar street lamp controller, solar battery and LED light source, but also pay attention to the selection of solar street lamp panel, because solar panel is a component that directly affects the power generation efficiency of solar road, and the power generation efficiency affects the amount of electricity stored in the battery, thus affecting the overall lighting effect of solar street lamp.
Capacity selection of solar battery2022/03/27
Solar street lamp is a comprehensive system. All components should be reasonably configured according to parameters to achieve the best use of solar street lamp. In addition, we should not only pay attention to the solar street lamp controller, solar battery and LED light source, but also pay attention to the selection of solar street lamp panel, because solar panel is a component that directly affects the power generation efficiency of solar road, and the power generation efficiency affects the amount of electricity stored in the battery, thus affecting the overall lighting effect of solar street lamp.
Solar cell PCBA circuit2022/03/21
China's most professional solar PCBA factory Solar cell PCBA is becoming more and more popular in places where it is not convenient to use power electricity. We fix the orientation of solar cell PCBA, roughly pointing to the south at an angle. Because the sun rises in the East and sets in the west every day, the direction of light is constantly changing, and the direction of the sun throughout the year is also changing. Although it is simple, it also loses the efficiency of solar panels. In order to improve the power generation efficiency of solar panels, it is necessary to make the PCBA of solar cells change with the change of sunlight. The circuit uses two simple comparators to adjust the direction of the solar panel according to the direction of the sun, so as to follow the direction of the sun and improve the power generation efficiency of the solar panel.
The key to the efficiency of solar power generation is determined by the charge discharge controller2022/03/20
The solar charging and discharging controller is an automatic control device used in the solar power generation system to control the multi-channel solar cell array to charge the battery and the battery to supply power to the load of the solar inverter. The solar cell array causes over discharge, overload, short circuit and reverse connection to the charging of the storage battery. The solar power generation system scheme must be equipped with a charge discharge controller. It is the core component of the whole solar power generation system. Although its system cost accounts for a small proportion, it plays an important role. Therefore, whether the solar power generation equipment can realize its maximum value is very important for the selection of controller.
Ice maker function sharing2022/03/19
1) Water leakage alarm: the main research and development of water leakage alarm equipment, and control the whole machine circuit to cut off the power supply. Different from computer PCBA control, it can eliminate the occurrence of water leakage. 2) No dry burning: use the water level ladder control principle to avoid dry burning 3) Ice production: the original use of spray, water and immersion ice making, which can be selected 4) Control and protection: multiple protection functions are used, and each component is multi-level control, so as to prevent problems in controlling one component, 5) PCBA moisture-proof, moisture-proof and dust-proof process https://www.pcbav.com/ice-maker-control-panel-pcba.html
China ice maker PCBA factory2022/03/15
PCBA automatic control of ice maker: it adopts advanced COMS integrated circuit, automatic completion of water supply, ice making, deicing and fault protection, which is safe and convenient to use. The ice is adjustable: the thickness of the ice can be adjusted. Suitable for ice in various occasions. PCBA ice maker is energy-saving and efficient: now the new ice maker has saved more than one third of the power than the traditional ice maker, and the fluorine-free polyurethane is foamed as a whole.
The most advanced 600W DC / AC inverter PCBA scheme2022/03/08
Inverter PCBA This design is an inverter scheme for isolating low-voltage DC input and 220VAC sine wave output. With SPWM control mode, the output waveform has small harmonic distortion, fast dynamic response, complete isolation of front and rear stages, and has various protection functions such as input overvoltage, undervoltage, overload, short circuit and over temperature. There are few peripheral devices, high efficiency and low no-load power consumption.
The most advanced 600W DC / AC inverter PCBA scheme2022/03/08
Inverter PCBA This design is an inverter scheme for isolating low-voltage DC input and 220VAC sine wave output. With SPWM control mode, the output waveform has small harmonic distortion, fast dynamic response, complete isolation of front and rear stages, and has various protection functions such as input overvoltage, undervoltage, overload, short circuit and over temperature. There are few peripheral devices, high efficiency and low no-load power consumption.
Effect of humidity on PCBA2022/03/06
In the process of any process, we attach great importance to the control of moisture and humidity, ranging from abnormal body surface appearance to unqualified finished products. Therefore, the normal workshop should ensure that the moisture and humidity on the substrate surface are properly controlled to ensure that the environmental indicators in the production process of finished products are within the specified range.
PCB making process!2022/03/02
PCB fabrication includes PCB layout, core board fabrication, inner PCB layout transfer, core board drilling and inspection, lamination, drilling, copper chemical precipitation of hole wall, outer PCB layout transfer, outer PCB etching and other steps.
PCBA scheme of beauty massage instrument2022/02/26
PCBA scheme of beauty massage instrument2022/02/26
Design of connectors between PCB boards2022/02/18
With the extensive deployment of 5g base stations and the application of small active antennas, small base stations and other equipment in recent years, the market requires wireless base station modules such as RRH to be smaller and more compact. Therefore, the application of inter board connectors with reliable performance, small volume, large tolerance and high cost performance has become the consensus of R & D engineers of communication equipment manufacturers. According to the specific design requirements of the equipment, the layout form of PCB board and the transmission requirements of RF signal, select the appropriate parallel board to board connector and bridge connector between common boards, which is very helpful to the research and development of wireless equipment. In the design of RRH, active antenna and small base station, the following methods can be selected:
Design of connectors between PCB boards2022/02/18
With the extensive deployment of 5g base stations and the application of small active antennas, small base stations and other equipment in recent years, the market requires wireless base station modules such as RRH to be smaller and more compact. Therefore, the application of inter board connectors with reliable performance, small volume, large tolerance and high cost performance has become the consensus of R & D engineers of communication equipment manufacturers. According to the specific design requirements of the equipment, the layout form of PCB board and the transmission requirements of RF signal, select the appropriate parallel board to board connector and bridge connector between common boards, which is very helpful to the research and development of wireless equipment. In the design of RRH, active antenna and small base station, the following methods can be selected:
Considerations for PCB design thickness:2022/01/07
Of course, the conventional thickness of the general finished PCB is 0.8mm to 1.6 Mm, and the more common plate thickness specification is 1.6 mm in metric unit by default (about 63mil in British unit). Many connector standards are also adapted according to 1.6mm specification.
USB type-C pin signal and PCB layout and wiring2022/01/04
Usb-type-c is a relatively new standard, providing high-speed data transmission of up to 10Gb / s and power of up to 100W. It can make usb-c a truly universal connection standard for modern devices. There are three main functions: ● it has a reversible connection interface. The interface is designed so that the plug can be turned relative to the socket. ● it supports USB 2.0, USB 3.0 and USB 3.1 Gen 2 standards. In addition, it can support third-party protocols such as DisplayPort and HDMI in an operation mode called alternate mode. ● it allows the equipment to negotiate and select the appropriate power flow through the interface.
USB type-C pin signal and PCB layout and wiring2022/01/04
Usb-type-c is a relatively new standard, providing high-speed data transmission of up to 10Gb / s and power of up to 100W. It can make usb-c a truly universal connection standard for modern devices. There are three main functions: ● it has a reversible connection interface. The interface is designed so that the plug can be turned relative to the socket. ● it supports USB 2.0, USB 3.0 and USB 3.1 Gen 2 standards. In addition, it can support third-party protocols such as DisplayPort and HDMI in an operation mode called alternate mode. ● it allows the equipment to negotiate and select the appropriate power flow through the interface.
Easy to understand USB PCB wiring2022/01/03
USB is a fast, bidirectional, synchronous transmission, cheap and convenient hot plug serial interface. Due to the advantages of fast data transmission, convenient interface and support for hot plug, USB devices are widely used. At present, the market is dominated by USB2 0 is the interface of most products, but many hardware novices encounter many problems in USB application. Often after PCB assembly, USB interface has various problems, communication is unstable or unable to communicate. There is no problem in checking schematic diagram and welding. Maybe it is necessary to suspect that PCB design is unreasonable at this time. Drawing meets USB2 0 data transmission requirements PCB plays a very important role in product performance and reliability. The above is the best wiring mode summarized by our company according to many years of experience, which is easy to understand.
Quickly understand the popular PCBA schemes of Bluetooth circuit,2021/12/31
Bluetooth PCBA Technology: an open global specification for wireless data and voice communication. Based on low-cost short-range wireless connection, it is a special short-range wireless technology connection for establishing communication environment for fixed and mobile devices.
Quickly understand the popular PCBA schemes of Bluetooth circuit,2021/12/31
Bluetooth PCBA Technology: an open global specification for wireless data and voice communication. Based on low-cost short-range wireless connection, it is a special short-range wireless technology connection for establishing communication environment for fixed and mobile devices.
PCB FAQs2021/12/30
PCB chemical copper cylinder solution contaminated Causes of liquid medicine pollution: 1. Insufficient water washing before PTH 2. PD water brought into the copper cylinder 3. A plate fell off the cylinder 4. No cylinder explosion for a long time 5. Insufficient filtration Cylinder washing: soak in 10% H2SO4 for 4 hours, neutralize with 10% NaOH, and finally clean with water.
PCB design points of USB interface2021/12/29
USB: universal serial bus is a serial bus standard connecting computer system and external equipment. It is also a technical specification of input and output interface. It is applied to information communication products such as personal computers and mobile devices, and extended to photographic equipment Digital TV (set-top box), game console and other related fields. The latest generation is USB 3.1, the transmission speed is 10Gbit / s, the three-stage voltage is 5V / 12V / 20V, and the maximum power supply is 100W. The new type C plug-in is no longer positive or negative. It shows several common USB interfaces. This type of USB interface is widely used in mid products.
Via design of PCB2021/12/28
Multi layer PCB needs to be used in PCB design, and via is an important factor in multi-layer PCB design. The via in PCB is mainly composed of hole, pad area around the hole and power layer isolation area.
PCB component layout2021/12/27
In the process of PCB component layout, after the system layout is completed, the PCB drawing needs to be reviewed to consider whether the system layout is reasonable and whether the optimal effect can be achieved. We can review it from several aspects:
The most intelligent and advanced sealing machine PCBA R & D scheme2021/12/24
The POB board gives the unique number and ID of the equipment. The equipment ID is entered into the system background after leaving the factory. The end user's mobile phone scans the code link to fill in the user information and matches with the unique number of the corresponding equipment. The background matches and completes the audit. After the machine is activated, the sealing operation can be completed.
Why are PCBs layered2021/12/23
Classification of PCB circuit layers: it is divided into single panel, double-sided board and multilayer board. The multilayer board we often see is generally 4-layer board or 6-layer board, and the complex multilayer board can reach dozens of layers. The principle of PCB layering is analyzed in detail below:
How to design connector pin arrangement for PCB?2021/12/22
Introduction to connector pin design There are several important points to consider in connector pin design: what is the connection length? Is it a short board to board connection or a long cable to drive the signal? What frequency (for analog signals) or what is the signal rise time (for digital signals)? Routing differential pairs or single ended signals? Whether a specific impedance target needs to be achieved, or whether the connection is short enough that the impedance does not matter
Wiring of eight layer PCB design case of computer motherboard2021/12/21
The wiring looks beautiful. The purpose of this routing is to extend the total length of the routing. It is applied in parallel data lines to make the routing length of the same group of parallel data lines consistent, so that the arrival time of data is consistent when transmitting data at high speed. The routing step of serpentine routing is to use ordinary routing to route the same group of parallel data lines. Then find out the line with the longest length of this group of data lines, and then take the length of the longest line as the reference, and extend the line smaller than the reference value through the serpentine routing to be equal to the reference value or reach a certain range of the reference value. The general circuit board design software has related routing and wiring functions. You only need to set relevant parameters.
Eight layer PCB design case of computer motherboard2021/12/21
The first signal layer, also known as the top layer, is a layer for electronic components. It can be seen from the above figure that there are many wiring on this floor. One of the reasons is that the electronic components are placed on the same layer, and there is no need to set a via conversion layer in the wiring process. This prevents vias from blocking the routing of other layers. Instead, pay attention to the setting of vias in multilayer board wiring.
Trend of PCB industry in China2021/12/20
Although China now ranks first in the world in terms of industrial scale, it still lags behind the world's advanced level in terms of the overall technical level of PCB industry. In terms of product structure, multilayer board accounts for most of the output value, but most of them are medium and low-end products below 8 floors. HDI and flexible board have a certain scale, but there is a gap in technical content with foreign advanced products such as Japan. Few enterprises can produce IC carrier board with the highest technical content in China
PCB board classification, do you understand?2021/12/20
PCB board is the load body of all electronic products, that is, electronic products must form a complete circuit through PCB board to realize various functional requirements.
PCI Express board PCB design2021/12/16
The routing length of the card from the edge of the golden finger to the PCIe chip pin shall be limited to 4 inches (about 100mm). After exceeding this length, the high-frequency differential transmission line needs to be used, and we can provide a technical scheme to extend it by more than 300mm.
PCI Express board PCB design2021/12/16
The routing length of the card from the edge of the golden finger to the PCIe chip pin shall be limited to 4 inches (about 100mm). After exceeding this length, the high-frequency differential transmission line needs to be used, and we can provide a technical scheme to extend it by more than 300mm.
Introduction to PCB material2021/12/16
PCB boards are generally classified by the insulating part of the substrate, such as electric board, fiberglass board and various plastic boards. PCB manufacturers generally use an insulating part composed of glass fiber, non-woven materials and resin, and then press epoxy resin and copper foil into a "preg".
Introduction to PCB material2021/12/16
PCB boards are generally classified by the insulating part of the substrate, such as electric board, fiberglass board and various plastic boards. PCB manufacturers generally use an insulating part composed of glass fiber, non-woven materials and resin, and then press epoxy resin and copper foil into a "preg".
Purpose of PCB2021/12/14
The global discussion on the development trend of PCB production and manufacturing technology in the future is basically the same, that is, to develop in the direction of high density, high precision, fine aperture, fine wire, fine spacing, high reliability, multi-layer, high-speed transmission, light weight and thin, and to improve productivity, reduce cost, reduce pollution and adapt to multi variety and small batch production. The technological development level of printed circuit is generally represented by the line width, aperture and plate thickness / aperture ratio on the printed board
PCB embryonic stage and environmental impact2021/12/11
PCB is an important electronic component, the support of electronic components and the carrier of electrical connection of electronic components. Because it is made by electronic printing, it is called "printed" circuit board.
PCB embryonic stage and environmental impact2021/12/11
PCB is an important electronic component, the support of electronic components and the carrier of electrical connection of electronic components. Because it is made by electronic printing, it is called "printed" circuit board.
Why is programming so difficult?2021/12/09
Many times, we need to work with others to write programs, which also brings challenges.
Why is programming so difficult?2021/12/09
The process of writing code can let you clearly grasp the working mode of the program. However, the program will never stop changing. You will find errors, add new features, or modify existing behavior. Even if the initial organization of the program is very effective, it does not mean that its structure is always correct. You need to spend time combining situations, considering future needs, and cleaning up the mess when there are accidents.
Why is programming so difficult?2021/12/09
Programming is very difficult. In fact, it has nothing to do with the programming language. First, you must master all the practical details; Secondly, you must understand what the program should do in each case; Moreover, you must convey all the information in a way that your friends can understand. This means that you must organize the information in an organized way to ensure that it is easy to understand.
How to reduce electromagnetic interference in PCB design and development?2021/12/03
EMI generated by high-frequency digital signals will not only cause mutual interference within the system, but also produce strong electromagnetic radiation, resulting in exceeding the limit standard of electromagnetic compatibility EMC. This phenomenon occurs at the edge of multi-layer RF circuit board ("PCB").
China's most professional brushless motor fan PCBA development factory2021/11/29
Chip csu32p10 chip is a high-performance single chip microcomputer with 8-bit RISC architecture and 12 bit ADC. The chip has 64 byte SRAM and simple peripheral configuration, which can meet the needs of multi-functional design on the premise of saving circuit cost. This single chip microcomputer has excellent ad measurement, including six reference voltages of internal 1.4V, 2.0V, 3.0V, 4.0V, Vdd and external input. It can realize hardware level correction of internal reference voltage and one channel of 32mhz 12 bit PWM output. It is suitable for product development in many fields.
China's most professional brushless motor fan PCBA development factory2021/11/29
Chip csu32p10 chip is a high-performance single chip microcomputer with 8-bit RISC architecture and 12 bit ADC. The chip has 64 byte SRAM and simple peripheral configuration, which can meet the needs of multi-functional design on the premise of saving circuit cost. This single chip microcomputer has excellent ad measurement, including six reference voltages of internal 1.4V, 2.0V, 3.0V, 4.0V, Vdd and external input. It can realize hardware level correction of internal reference voltage and one channel of 32mhz 12 bit PWM output. It is suitable for product development in many fields.
The most fashionable and convenient leafless hanging neck fan2021/11/18
Hanging neck fan is a very fashionable product in the past two years. What should the ideal hanging neck fan be like? The wind force should be strong enough, the angle should be adjustable, the storage should be convenient, and the shape should be fashionable enough. The hanging neck fan independently developed by Dongguan mayor Sen Electronic Technology Co., Ltd. has these functions.
The most fashionable and convenient leafless hanging neck fan2021/11/18
Hanging neck fan is a very fashionable product in the past two years. What should the ideal hanging neck fan be like? The wind force should be strong enough, the angle should be adjustable, the storage should be convenient, and the shape should be fashionable enough. The hanging neck fan independently developed by Dongguan mayor Sen Electronic Technology Co., Ltd. has these functions.
Moving little sun2021/11/13
The warm hand treasure independently developed by Dongguan Changsen Electronic Technology Co., Ltd. is not only small and portable, but also can charge the mobile phone! We call it the moving little sun
Moving little sun2021/11/13
The warm hand treasure independently developed by Dongguan Changsen Electronic Technology Co., Ltd. is not only small and portable, but also can charge the mobile phone! We call it the moving little sun
Moving little sun2021/11/13
The warm hand treasure independently developed by Dongguan Changsen Electronic Technology Co., Ltd. is not only small and portable, but also can charge the mobile phone! We call it the moving little sun
Functional analysis of the most professional warm hand treasure PCBA2021/11/11
Warm hand treasure features Power indication function Overcurrent protection function Overvoltage protection function Short circuit protection function Standby low power consumption No load automatic shutdown Lithium battery protection function 2A charge 2A discharge Temperature constancy function
Warm hand treasure, is the warm hand bag safe2021/11/03
What should we pay attention to when buying and using warm handbags correctly and having a intimate "treasure in the palm" in cold winter? Dongguan Changsen Electronic Technology Co., Ltd https://www.pcbav.com Many years of experience in the development and production of warm handbags and warm hand treasures remind you of matters needing attention.
How to correctly purchase charging warm hand treasure?2021/11/01
According to the requirements of the China market regulatory bureau, the rechargeable warm hand treasure is an electronic product similar to the sustainability of battery energy supply and external heat transfer. It is deeply loved by consumers because of its portability. However, at present, the quality of warm hand treasure products sold in the market is uneven. Consumers should choose carefully and pay attention to the safety of products. Special safety tips for everyone,
How long can PCBA finished products be stored?2021/10/27
Dongguan Changsen Electronic Technology Co., Ltd. has been engaged in PCBA development and manufacturing for many years, especially PCBA storage and sharing
How long can PCBA finished products be stored?2021/10/27
Dongguan Changsen Electronic Technology Co., Ltd. has been engaged in PCBA development and manufacturing for many years, especially PCBA storage and sharing
Small fan PCBA principle sharing2021/10/18
The working principle of the small fan is that the energized coil rotates under force in the magnetic field, and the electric energy is converted into mechanical energy to generate wind. Dongguan Changsen Electronic Technology Co., Ltd. designed and developed the PCBA scheme of small fan independently, which was completed by brushless motor and main control chip hu813. Its functions are described as follows:
Nail lamp PCBA successful scheme2021/10/15
Introduction of warm hand treasure PCBA scheme2021/10/07
Warm hand treasure PCBA module, including LED lights, shell molds and other sets of materials, warm hand + charger!
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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