Why does the same 422 driver chip have different signals and different output high levels? When passing a pulse signal with a pulse width of 10ms and 1Hz, the output high level is 4.5V, but when passi...
NB-Iot stands out as a narrowband Internet of Things technology in various industries, and its applications cover multiple fields. In this article, the editor of Jixun will explain the main applicatio...
[i=s]This post was last edited by ddllxxrr on 2021-5-16 15:55[/i]This chapter really shocked me, because I didn't understand a lot of the knowledge. This is how I have been for many years.
It’s quite ...
Data validity
The data on the SDA line must remain stable during the high period of the clock. The high or low state of the data line can only change when the clock signal on the SCL line is low.Start...
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PrefaceI have been working on motor control for half a year. The most basic motor control is the six-step square wave drive of the brushless DC mo...
Friends who have worked on products have all experienced that a design seems easy, and hardware design and code writing can be done quickly, but more or less accidents occur during the debugging proce...[Details]
1 Introduction
I used a PGJ1-5 reactive power compensation panel in a 400V switch room. The panel contained 10 BCMJ parallel capacitors, each with a rated output of 16kVar, a rated voltage of...[Details]
In turbulent times, investors are more interested in assets that have proven to be winners. As the marginal impact of the epidemic gradually weakens, the value of technology stocks has reappeared, be...[Details]
Compared with hardware receivers, GPS software receivers (SR) have the same functions, such as positioning and speed measurement, but the implementation environment is different. SR is completed on...[Details]
Spring is the best season of the year. This spring, the term "new quality productivity" has become the most popular one. On March 28, the Shenzhen International Industrial Manufacturing Technology ...[Details]
According to phonearena, insider Evan Blass revealed that an official media rendering clearly shows the front panel design of Google Pixel 4. This leaked rendering reveals a "mysterious" date - ...[Details]
Clocks are widely used in computer, communication and consumer electronics products, including crystal oscillators and phase-locked loops, and are mainly used for synchronization and latching of d...[Details]
Scientists at the National Research Council of Science and Technology in South Korea have demonstrated a promising new battery structure that could significantly improve capacity and charging time, a...[Details]
A motor is an electromagnetic device that converts or transmits electrical energy according to the law of electromagnetic induction. Its main function is to generate driving torque as a power sou...[Details]
The tester uses low-voltage pulse method and high-voltage flashover method to detect various cable faults, especially flashover and high-resistance faults of cables, which can be directly tested wi...[Details]
Compared with traditional light sources, LEDs also have technical advantages such as long life, fast response, potential high light efficiency, small size and narrow spectrum. But in essence, among...[Details]
1. Circuit The attached figure is a schematic diagram of the circuit for controlling digital display by AT90S8515 (only the circuit for the interface with the digital tube is drawn in the figure,...[Details]
1. Sugar content
Juice, jam and honey contain many ingredients, but the main one is sugar. The concentration of sugar can be expressed as the Brix value. The Brix value indicates the amount of su...[Details]
Earlier this month, the U.S. Patent and Trademark Office published Apple's Beats Earphones patent application, which shows that Beats headphones will introduce new health sensors. Apple's u...[Details]
On October 23, Cao Xin, deputy secretary of the Party Committee and general manager of Hebei Construction Investment Group, met with Wang Shuhui, secretary of the Party Committee and chairman of Yu...[Details]