Course 2857
Course Introduction:Course introduction: 1. Cross-domain processing, token management, route interception; 2. Real interface debugging, API layer encapsulation; 3. Secondary encapsulation of Echarts and paging components; 4. Vue packaging optimization and answers to common problems.
Course 1795
Course Introduction:Apipost is an API R&D collaboration platform that integrates API design, API debugging, API documentation, and automated testing. It supports grpc, http, websocket, socketio, and socketjs type interface debugging, and supports privatized deployment. Before formally learning ApiPost, you must understand some related concepts, development models, and professional terminology. Apipost official website: https://www.apipost.cn
Course 5521
Course Introduction:(Consult WeChat: phpcn01) The comprehensive practical course aims to consolidate the learning results of the first two stages, achieve flexible application of front-end and PHP core knowledge points, complete your own projects through practical training, and provide guidance on online implementation. Comprehensive practical key practical courses include: social e-commerce system backend development, product management, payment/order management, customer management, distribution/coupon system design, the entire WeChat/Alipay payment process, Alibaba Cloud/Pagoda operation and maintenance, and project online operation. .....
Course 5172
Course Introduction:(Consult WeChat: phpcn01) Starting from scratch, you can solve conventional business logic, operate MySQL with PHP to add, delete, modify, and query, display dynamic website data, master the MVC framework, master the basics of the ThinkPHP6 framework, and learn and flexibly master all knowledge involved in PHP development. point.
Course 8713
Course Introduction:(Consult WeChat: phpcn01) The learning objectives of the front-end development part of the 22nd issue of PHP Chinese website: 1. HTML5/CSS3; 2. JavaScript/ES6; 3. Node basics; 4. Vue3 basics and advanced; 5. Mobile mall/ Website background homepage layout; 6. Automatic calculation of tabs/carousels/shopping carts...
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2023-11-10 15:02:39 0 1 218
Send email using Symfony Mailer
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Course Introduction:The principle of the electromagnetic relay is: 1. The electromagnetic relay is composed of a coil and an iron core; 2. When enough current is passed through the coil to reach the pull-in current threshold of the relay, the iron core is acted upon by sufficient magnetic force and is attracted to move in the direction of the coil. , causing the contacts of the relay to close; 3. When the current in the coil is not enough to maintain the pull-in state of the relay, the iron core loses its magnetic force and returns to the original position, and the contacts return to the open state.
2023-08-17 comment 0 996
Course Introduction:An electromagnetic relay is an electromagnetic switch. The magnetic field generated when the coil is energized pulls the armature and drives the contacts to change states, thereby realizing the on-off or switching of the circuit. The main functions include isolation, amplification, switching and protection, and are widely used in fields such as power systems, industrial control, automotive electronics and household appliances.
2024-03-30 comment 0 679
Course Introduction:A relay is an electromagnetic switch that uses low-power electrical signals to control high-power circuits. The main functions include: isolation, amplification, switching, protection and automatic control. Its working principle is based on electromagnetism. When the control circuit is energized, a magnetic field is generated to close the contacts; when the power is turned off, the magnetic field disappears and the contacts are opened. Relays are used in a wide range of electronic devices and systems, including industrial automation, power control, automotive systems, communications equipment, and home appliances.
2024-04-28 comment 0 320
Course Introduction:继电器通过电磁力控制电气触点的开关,其工作原理为:线圈通电产生电磁力,吸引衔铁。衔铁克服弹簧力移动,带动触点切换状态。衔铁闭合后靠自身磁力保持,断电后弹簧力拉回衔铁,逆向切换触点。
2024-06-03 comment 0 524
Course Introduction:继电器有以下几种类型:1. 机械继电器(交流继电器、直流继电器、双稳继电器);2. 固态继电器(光耦型 SSR、零交叉型 SSR);3. 时间继电器(定时继电器、延时继电器);4. 特殊目的继电器(可编程继电器、保护继电器、安全继电器)。
2024-06-03 comment 0 674