Wireless power transfer uses radio to convert the power generated by the power plant into radio waves, and then collects and converts the radio waves into electric power through a specific receiving device for use people to use. Wireless Power TransferCatalogI IntroductionII DevelopmentIII FeaturesIV Development TrendsV Latest NewsVI Problems and Countermeas...

IntroductionVaristor, a resistive device with non-linear volt-ampere characteristics, which is mainly used to clamp a voltage and absorb excess current to protect the sensitive devices when the circuit is under overvoltage. Its English name is "Voltage Dependent Resistor" abbreviated as "VDR". Its resistor material is semiconductor, so it is a kind of semico...

IntroductionThe ground resistance is a resistance that the current flows into the ground from the grounding device and then flows through the earth to another grounding body or diffuses far away. The value of ground resistance reflects the good degree of contact between electrical device and the ground and reflects the scale of grounding grid.This article mainly introduces how to test the ground r...

IntroductionThe Giant Magnetoresistance (GMR) refers to the phenomenon in which the electrical resistivity of a magnetic material changes greatly when it has an external magnetic field as compared with the absence of an external magnetic field.It is a quantum mechanical effect that results from a layered magnetic thin film structure. This structure is formed by alternately laminating thin layers o...

IntroductionThe most basic function of pull-up or pull-down resistors (collectively referred to as "pull resistors") is to clamp a signal line with an uncertain state to a high level (pull-up) or a low level (pull-down) through a resistor. Regardless of its specific usage, this basic function is the same. But in different application, the resistance value will be different, whi...