Optocoupler Articles

Application of Optocouplers in PLC Control Modules – Advanced Optical Semiconductors

2026-05-24 by boardor

Search on WeChatAdvanced Optical Semiconductors# Advanced Optical Semiconductors # Programmable Logic Controllers (PLCs) are a crucial component of modern industrial automation, widely used in manufacturing, processing, construction, and various other industries. The core function of a PLC is to process various input signals and control the operation of output devices based on preset logic. To … Read more

Understanding PLC Input and Output Port Working Principles

2026-05-04 by boardor

Today, I bring you the wiring methods for sensors and PLCs, with twenty wiring diagrams. Isn’t that super rich? Let’s take a look! 1 Overview The digital input interface of the PLC is not complicated. To enhance its anti-interference capability, PLCs use optocouplers to isolate the input signals from the internal processing circuits. Therefore, the … Read more

Microcontroller Control of 220V AC Power Circuit Diagram

2026-04-22 by boardor

Microcontroller control of 220V AC power circuit diagram 1. For resistive loads For example, a regular light bulb, generally around 30 to 40W, if using 220V AC to control the power on and off, a simple solution is to use a bidirectional thyristor for direct control. The BT137 can handle up to 7A and has … Read more

Secrets of IoT Devices: ‘Electric Shock Prevention + Anti-Interference’ – Function Breakdown, Scene Adaptation, and Practical Usage of Optocouplers

2026-02-09 by boardor

1. Function Definition An optocoupler (光电耦合器, Optocoupler) is a semiconductor device that achieves electrical signal isolation and transmission through optical signals. Its core functions are electrical isolation and signal transmission. It consists of two parts: •Input side (light-emitting side): Typically a light-emitting diode (LED), which converts electrical signals into optical signals; •Output side (light-receiving side): … Read more

Design and Implementation of a Ten-Channel Wireless Relay Based on STM32

2025-12-29 by boardor

Introduction Recently, I created a six-channel wireless metal detector transceiver, and it seems I’ve become interested in wireless control. In this issue, we will introduce the design and implementation of a ten-channel wireless relay controller. The project aims to achieve button control of ten relays. The relays selected are industrial relays with a rated coil … Read more

Applications of Optocouplers in DC Power Modules

2025-10-31 by boardor

With the rapid development of electronic technology, DC power modules play an increasingly important role in various electronic devices. Optocouplers, as an important electronic component, are widely used in DC power modules for signal isolation and transmission. This article will explore the working principle, characteristics, and specific applications of optocouplers in DC power modules. 01 … Read more

Detailed Explanation of Components on Inverter Circuit Boards

2025-09-28 by boardor

The inverter circuit board is a core component of the inverter, responsible for controlling and regulating its operation. This article will provide a detailed introduction to various components on the inverter circuit board, including resistors, capacitors, inductors, diodes, transistors, IGBTs, optocouplers, and crystal oscillators. 1. Resistors Resistors are commonly used components on circuit boards, used … Read more

Hidden Costs of Isolated RS-485 Optocoupler Design, TI Offers New Solutions!

2025-05-07 by boardor

Hidden Costs of Isolated RS-485 Optocoupler Design Optocouplers, also known as optical isolators or optoelectronic couplers, have been used for over 40 years to achieve current isolation in electronic circuits. Optocouplers use LEDs and phototransistors to communicate signals without transmitting current. As a low-cost solution, optocouplers have remained popular. But considering the advancements in digital … Read more