How to Test Resistors with a Pointer MultimeterPage Browsing:91

Resistors are one of the most basic components in electronic circuits. Testing resistors is the basic skill for mastering and learning electronic technology. The testing methods and experience of common resistors are introduced in the following. A Pointer MultimeterCatalogI Fixed resistorsII Fuse resistorsIII PotentiometersIV Positive Temperature Coefficient (PTC) Thermistors V Nega...

Sep 23,2019

What Are the Functions and Applications of the Varistor?Page Browsing:513

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...

Mar 7,2019

How to Test Ground Resistance?Page Browsing:380

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...

Apr 28,2019

What is the giant magnetoresistance (GMR)?Page Browsing:875

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...

Apr 19,2019

The Pull-up Resistor and Pull-down ResistorPage Browsing:671

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...

Apr 11,2019