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　　A voltmeter is an instrument for measuring voltage. The commonly used voltmeter symbol is V. There is a permanent magnet inside the sensitive ammeter. A coil made of a wire is connected in series b...[Details]

An instrument for measuring the velocity of water in rivers, lakes, channels and other water bodies. There are three types: mechanical, electrical and ultrasonic. Mechanical types are mainly rotor-ty...[Details]

X1226 has the functions of clock and calendar. The clock relies on hour, minute and second registers to track, and the calendar relies on date, week, month and year registers to track. The calendar c...[Details]

The popularity of BEV+Transformer+ occupying the network technology route has once again pushed lidar to the forefront. Should lidar be abandoned? For car companies, this is a difficult choice: s...[Details]

From the data sheet, we can know that the CD pin is actually the I/O that controls the switching of commands and data. In the program, we use RS instead of The following figure shows the 8080 paral...[Details]

After briefly analyzing Nissan's e-POWER hybrid system, as well as BYD and Great Wall's plug-in hybrid systems, many people have become interested in the 48V mild hybrid system used by European and d...[Details]

When repairing or rewinding the three-phase winding of a three-phase asynchronous motor, the six lead wires must be distinguished at the head and tail, otherwise they cannot be correctly wired in the...[Details]

1. Purpose (1) Understand the principle of keystrokes and the design of the interface circuit with S3C2410 (2) Understand the external interrupt processing mechanism of the S3C2410 chip (3) Master t...[Details]

Many netizens who are new to 51 microcontrollers will have this question: What is AT89S51? Books and online tutorials all mention 8051, 89C51, etc.! Never heard of 89S51? ! Here, beginners need to ...[Details]

       Similar to the P40 series, Huawei's Mate 40 series may launch three models this year, namely Mate 40, Mate 40 Pro and Mate 40 Pro+. 　　A digital celebrity revealed on Weibo that the curvature o...[Details]

Duke Energy battery installation. Photo: Duke Energy. Energy storage is not only being used to address the main challenge facing renewable energy sources such as wind and so...[Details]

    A week ago, Sony officially announced that the next-generation console is PlayStation 5 (hereinafter referred to as PS5), which will be launched at the end of 2020. The handle will be completely ...[Details]

      OnePlus has announced a successor to last year's budget-friendly Buds Z, and while the new Buds Z2 look exactly like the originals, they offer significant upgrades, most notably active noise ca...[Details]

1 Overview With the development of the Internet, in order to facilitate people to receive emails in real time, this article introduces an "e-mailman" system based on a single-chip microcomputer and L...[Details]

#include    #include   #include   #include "lcdbn.h"  uchar data1 ={0,2,5,0};  uchar data2 = {0,0,0,0};  uchar j,key=0;  uchar chr ="pre: *2%";  uchar *chr1 ={"openc V: ",                  "s...[Details]