All
    Xinzhizao
    Maintenance Basis
    Welding Technique
    Electronic Circuit Basis
    iPhone Maintenance
    Exterior Screen Maintenance
    Andriod Phone Maintenance
    MacBook
    Laptop Maintenance
    Desktop Computer Mainboard Maintenance
    Graphics Card Maintenance
    Series of courses
    Microphone fault repairing
    Domestic mainboard repair
    All
    Basic Circuit Concepts
    Electronic components
    All
    Current
    Voltage
    Circuit
    Power supply
    Grounding
    Load
    Short circuit
    Open circuit
    Series-parallel circuit
    Power
    High and low levels
    Rising and falling edges
    Waveform (frequency)
    Filtering：
    General
    Popularity
    Price
    Video
    04.The hazard of abnormal current
    Current
    free
    67person
    Video
    03.The measurement of current
    Current
    free
    36person
    Video
    02.The unit of current
    Current
    free
    45person
    Video
    01.What is current
    Current
    free
    56person
    Links：