Learn to DIY a Quadcopter in One Minute

Learn to DIY a Quadcopter in One Minute

First, let’s summarize the main components involved in DIYing a drone. Can you guess what it is? Of course, it’s a………. a chicken frame, haha!!! Just a little joke to start with some humor, Let’s take a look at what a DIY quadcopter actually is. It generally looks like this: Now, let’s get to the … Read more

In-Depth Analysis of the SMT (FPC) PCBA Production Process (2021 Edition)

In-Depth Analysis of the SMT (FPC) PCBA Production Process (2021 Edition)

SMT Top Networking Circle A professional circle for sharing networking resources and achieving career advancement. New Platform 2020 1. FPC Preprocessing FPC boards are relatively soft and are generally not vacuum packaged when leaving the factory. They are prone to absorb moisture from the air during transportation and storage, so they need to undergo a … Read more

TV Black Screen? Troubleshoot in 3 Categories (with Circuit Board Testing Diagrams)

TV Black Screen? Troubleshoot in 3 Categories (with Circuit Board Testing Diagrams)

1. Classification of Black Screen Issues and Corresponding Solutions Black Screen Type Accompanying Symptoms Possible Causes Repair Cost Complete Black Screen Power light off Power board failure 50-100 RMB Backlight On, No Image Indicator light stays on Main board / Logic board issue 100-300 RMB Screen Lights Up Then Turns Off Indicator light blinks Backlight … Read more

When RS485 Meets WiFi: Lessons Learned from Industrial IoT Gateway Transformation

When RS485 Meets WiFi: Lessons Learned from Industrial IoT Gateway Transformation

unsetunsetIntroductionunsetunset Last week, I encountered a real project failure where Old Zhang’s robotic arm suddenly started dancing, and the PLC data could not be transmitted to the cloud. Today, let’s discuss how to use a $20 ESP32 module to handle both PLC’s RS485 communication and cloud data integration. No need for high-end gateways; follow me … Read more

How to Use a Multimeter to Measure and Distinguish Between Voltage, Neutral, and Live Wires

How to Use a Multimeter to Measure and Distinguish Between Voltage, Neutral, and Live Wires

Source: Electrician Home Electrical Technicians Technical Club:200037175 Electrical Personnel Procurement Alliance Group:436576602 Application Format:City Name – Company Name (Electrical Engineer Job Title) Before starting the second part of voltage testing, let’s insert a small section A: How to choose the multimeter probe socket under different ranges First, let’s take a look at the sockets available … Read more

Practical Oscilloscope Manual Collection: Your Guide to Testing and Measurement

Practical Oscilloscope Manual Collection: Your Guide to Testing and Measurement

The oscilloscope is an essential tool for all electronic engineers. This document shares the basic structure, working principles, and measurement operations of oscilloscopes, and introduces methods and techniques for using oscilloscopes in scenarios such as signal measurement and power integrity testing. Table of Contents: Illustrated Guide to Oscilloscope Usage and Application Techniques, “In-Depth Understanding of … Read more

What to Do When Your Camera SD Card Cannot Be Read

What to Do When Your Camera SD Card Cannot Be Read

What should you do when your camera’s memory card cannot be read? When encountering a situation where the camera’s memory card is unreadable, do not randomly download anything or attempt repairs. Instead, seek the assistance of a professional camera repair technician to determine the cause. Generally, the reasons for an SD card being unreadable include … Read more

One-Click Recovery of SD Card Data: Say Goodbye to Damage, Accidental Deletion, and Formatting Issues!

One-Click Recovery of SD Card Data: Say Goodbye to Damage, Accidental Deletion, and Formatting Issues!

The SD card, as a common flash storage medium, is renowned for its compactness, portability, high-speed transfer, and large storage capacity, making it highly popular and trusted in modern digital life. However, during the use of SD cards, files may sometimes be lost due to accidental deletion, formatting, partitioning, or other reasons, especially important photo … Read more

DIY Upgrade of In-Car Entertainment System: Advanced Skills for Beginners

DIY Upgrade of In-Car Entertainment System: Advanced Skills for Beginners

The original in-car entertainment systems often have limited functionality, are outdated, and lack modern connectivity. Replacing with an aftermarket head unit can solve these issues, and ordinary car owners can complete the installation themselves. Problem Analysis Before replacing the head unit, car owners usually worry about: Whether it will affect other vehicle functions If they … Read more

Key Points in Designing PLC Control Systems: A Must-Read!

Key Points in Designing PLC Control Systems: A Must-Read!

Focus onMechanicalIndustry, Professional, Vocational Information Sharing Serving millions of engineers in the manufacturing industry Recommended Reading [Professional Accumulation] A Comprehensive Guide to O-Ring Design, It Might Be Useful for You… [Made in China] A Bulletproof Plate That Completely Impresses Foreigners with “Made in China” [Professional Accumulation] 33 Classic Mold Dynamic Diagrams, Easy to Understand! [Broad … Read more