The fast charging protocol is the "language" required for the charger and the device to communicate and shake hands. Only after the correct "dialogue" can the "handshake" be successful and fast chargi...
Hello everyone, I am very happy to be selected for this power bank disassembly. I chose the Black Cat Bit Fast Charger, which costs 69 yuan, but when I received it, I received the Xiaomi 22.5 Fast Cha...
Do I need to draw my own circuit board for the electronic competition? Or do I use a ready-made development board?
Do you need to do the welding yourself?
Newbie, please help! I'm about to cry!...
How to configure random generation of parameters (Get request with parameters) when using jmeter tool for interface stress testing? This is my first time using this tool. I have searched a lot of info...
A few days ago, I saw a video on the Internet. There was an owner who was not at home most of the time. He went home for one day in a certain month. As a result, he received a reminder for electricity...
In many circuits, one power supply may correspond to multiple loads. Sometimes the power supply of the load needs to be switched, and sometimes the load needs to be current limited. The usual method i...
Abstract: AD7892 is an LC2MOS single-supply 12-bit analog-to-digital converter produced by AD Company in the United States. It can output in parallel or serially. This article introduces its func...[Details]
In order to solve the problem of potential safety hazards in open password input devices, a password input method and a password input device are provided. This device fundamentally prevents t...[Details]
With the development of science and technology, the application prospects of liquid crystal display modules are broader. At present, they have been widely used in electronic watches, calculators, L...[Details]
Question 10:
When testing the power supply ripple and noise, the 20MHZ bandwidth is selected to test whether the power supply itself meets the requirements. For low-frequency signals such as power su...[Details]
Since the early days of the computer industry, chip designers have had an insatiable appetite for transistors. Intel’s 2,300-transistor 4004 microprocessor in 1971 sparked the microprocessor revoluti...[Details]
1. Working principle
★ When U2 is in the positive half cycle and its value is greater than the voltage Uc across the capacitor, diodes D1 and D3 are turned on, while D2 and D4 are turned off...[Details]
1. Introduction
In recent years, with the development of wireless communication technology and microelectronics technology, contactless IC card (RF card) technology has flourished and has ...[Details]
Solenoid valves are divided into three categories in principle: direct-acting, step-by-step direct-acting, and pilot-operated.
1. Direct-acting solenoid valve
Principle: When th...[Details]
1. The inverter external switch controls the forward and reverse circuits
2. Power on the inverter (press button SB2 to form a self-locking circuit)
3. Forward control (switch...[Details]
The rectifier bridge is a bridge structure that connects four rectifiers and is encapsulated in plastic. It has the same structure and function as a bridge rectifier composed of four rectifier diodes...[Details]
On December 10, the Xiamen Municipal Bureau of Industry and Information Technology issued the "Notice on the Proposed Establishment of a New Energy Vehicle Power Battery Recycling and Utilization I...[Details]
As we all know, test engineers always encounter various problems when working on site. So how to solve the problems or reduce some avoidable errors to improve the measurement quality? This article ...[Details]
Perovskite solar cells have the advantages of low cost and high photoelectric conversion efficiency. After more than ten years of rapid development, the efficiency of perovskite single-junction cel...[Details]
The first China International Smart Terminal Industry Development Conference was held in Yibin, Sichuan. This was the first time that five major associations, including the China Communications Assoc...[Details]
Power technology
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