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  • 5 points of switching power supply design
    5 points of switching power supply design
    Nowadays, our life is inseparable from the power supply. All aspects require the supply of power. If there is no power supply, nothing can be achieved. Therefore, special care must be taken when designing the switching power supply. Do not let the circuit have problems. So, what should you pay attention to when designing the switching power supply? The manufacturer of the Unicom power adapter believes that the following five aspects need to be noted.
    2006-01-19
  • Can the notebook power adapter be burned?
    Can the notebook power adapter be burned?
    The notebook's power adapter is broken and can be repaired. However, since the notebook's power adapter is usually ultrasonically bonded and does not have a nut to fix the case, once the case is removed, the case cannot be restored, which will affect the normal use when used... ...
    2019-05-15
  • Static problem solving method
    Static problem solving method
    To solve the ESD problem, the equipment should be classified to achieve different processing methods for different types of equipment: One type of equipment: metal structure equipment, metal casing connected to the earth. Including two cases: one is connected to the earth through the system grounding wire, and the other is through the power supply
    2019-05-15
  • Accurately measure power ripple
    Accurately measure power ripple
    Accurately measuring power ripple is an art in itself. In the example shown in Figure 1, a junior engineer completely misused an oscilloscope. His first mistake was to use an oscilloscope probe with a long ground lead; his second error
    2019-05-15
  • Introduction to electromagnetic compatibility testing technology
    Introduction to electromagnetic compatibility testing technology
    General The EMC test tests the equipment according to the methods specified in the EMC standard and evaluates whether it meets the standard requirements. EMC performance must meet standard requirements before finalizing and entering the market. EMC test project EMC measurement main points
    2019-05-15
  • Seven principles of electronic product safety protection design
    Seven principles of electronic product safety protection design
    The purpose of product safety is to avoid harm to humans, animals or the environment caused by the use of products, especially to avoid harm or even death to the human body, and to reduce the potential danger of the product to an acceptable level.
    2019-05-15
  • Starting school
    Starting school "class teacher" fraud, have you recruited?
    In order to better understand the children's situation, parents have added class class teacher WeChat. However, some parents found that just after the overtime class had received the school information sent by the class teacher, they would download the app and download it to find out...
    2019-05-15
  • The 23-year-old flight attendant was electrocuted and the suspect was actually it.
    The 23-year-old flight attendant was electrocuted and the suspect was actually it.
    When the phone is charging, don't call, excessively indulge in the mobile phone. Will you have your life and your letter? The tragedy sometimes happens. When it happens to you, everything is already late...
    2019-05-15
  • Why does China lead the evolution of smart home industry?
    Why does China lead the evolution of smart home industry?
    The overlord of the home appliance industry has always been Japan, but now, China has emerged as a vane in the global home appliance industry. At the same time, domestic appliance makers also want to share a piece of cake, and began to carefully layout the field of smart home.
    2019-05-15
  • The power adapter failure rate is as high as 17%. Is this really true?
    The power adapter failure rate is as high as 17%. Is this really true?
    It was learned from the General Administration of Quality Supervision, Inspection and Quarantine that the second batch of AQSIQ in 2018 randomly selected 70 batches of power adapter products produced by 65 enterprises in six provinces and municipalities including Beijing, Jiangsu, Zhejiang, Fujian, Guangdong and Chongqing.
    2019-05-14
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