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Sep 17 2020

What is A Bandpass Filter?

IntroductionA band pass filter is an electronic device or circuit that allows signals between two specific frequencies to pass. That is, allowing signals in a specific frequency band to pass while shielding other frequency bands. In other words, a band-pass filter attenuates frequency components in

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Sep 11 2020

LED Drivers Tutorial: Failure Analysis and Maintenance

Introduction LED lights cannot directly use the conventional mains grid voltage, because of the characteristics of LED lighting. In order to meet the special voltage and current requirements of LEDs, a specially designed voltage conversion device must be used to make LEDs work normally. This device

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Sep 10 2020

How to Discharge a Capacitor?

Introduction Many people who are often engaged in maintenance work have experienced electrical shocks after being turned off. Obviously, the "culprit" causing this phenomenon is the capacitor. From power capacitors to filter capacitors to the graphite coating of old-fashioned televisions' picture

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Sep 3 2020

Types of Hard Disk Drive Interface

IntroductionThe hard disk interface is the connecting part between the hard disk and the host computer system, and its function is to transmit data between the hard disk cache and the host memory. Different hard disk interfaces determine the data transmission speed between the hard disk and the comp

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Aug 31 2020

Resistor Basics: Resistors in Series and Parallel

Introduction Resistors are usually connected in a circuit in various ways, and the two most basic ways are series and parallel. This article will mainly introduce these two connection methods, including their definitions, formulas, circuit diagrams, examples and identification methods. In addition,

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Aug 18 2020

Using Op Amps as Comparators Characteristics Overview

Introduction In electronics, operational amplifiers are generally dual/quadruple configurations. So users can consider using the extra amplifier as a comparator. Electrical symbols of the comparator and the operational amplifier are very similar. They are devices with one input inverting terminal a

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Aug 12 2020

Electrical Relay: Relay Contact Overview

Introduction The relay is an electrical device regarded as a switch in the circuit. That is, the current in the control circuit depends on the "open" and "close" of relay contacts. Therefore, the reliability and service life of the relay depend on the quality and performance of the contacts&nb

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Aug 7 2020

What are Capacitors in Series and Parallel?

Introduction Capacitors are components that store electricity and electrical energy (potential energy), and play an important role in circuits such as tuning, bypassing, coupling, and filtering. Capacitors are connected in parallel to increase capacity, and capacitors are connected in series to dec

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Aug 5 2020

How Relays Work? Relay Functions and Applications

Introduction A relay is an electromagnetic switch operated by a relatively small electric current that can turn on or off a much larger electric current. It consists of a set of input terminals for a single or multiple control signals, and a set of operating contact terminals. Because of unique cha

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Jul 31 2020

Oscillator Basics: Oscillator Circuit Types Explanation

Introduction Simply put, an oscillator is a device that can convert DC power into AC power without external signal excitation. The so-called "oscillation" implies alternating current. This article will mainly explain the circuits of different sine wave oscillators, including their working principle

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