In the last issue, we have eliminated A. In this issue, we need to display the letters AB at the same time, which requires two lvgl tags. How to do it? I thought of the structure:
struct Obj{char name...
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How do satellite communications work from space?The International Space Station (ISS) orbits the Earth about 217 miles (350 kilometers) above the Earth's surface. That's about 1,148,294 feet (yes, ove...
[i=s]This post was last edited by damiaa on 2020-9-8 10:46[/i]Domestic core TLSR8285 / TLSR8278 multi-protocol wireless chip
It's a Shanghai company, and it uses English language.
Telink’s new generat...
Stereo preamplifier 2.1, tone control + subwoofer, useful preamplifier circuit for active boxes, combined with a power amplifier. It has a bass filter for the subwoofer channel and a stereo channel...[Details]
LED display screen is composed of a row of light-emitting diodes, so the quality of LED directly affects the overall quality of the display screen. 1. Brightness and viewing angle The brig...[Details]
Although many descriptions of modulation portray it as a multiplicative process, the reality is more complicated. First, for clarity, if the signal Acos(ωt) and the unmodulated carrier cos(ωt) ar...[Details]
Preface
The multi-parameter weight monitor can provide important patient information for medical clinical diagnosis. It can detect important parameters such as the human body's ECG signal, hea...[Details]
News on the morning of December 16th, vivo recently began to warm up the new flagship X60 series. After announcing a few days ago that it will cooperate with Zeiss lenses, it announced today th...[Details]
At present, academic circles still use "listing" to score autonomous driving algorithms. The so-called "listing" is to use its training data set to test the merits of the algorithm on a certain data ...[Details]
Recently, JEKA Robotics completed the delivery of its Series D financing, becoming the company with the most financing rounds and the largest financing scale in the field of collaborative robots.
...[Details]
The European Commission announced the long-planned "Chip Act" on the 8th, hoping to increase chip supply to four times the current level by 2030 by increasing investment and strengthening research an...[Details]
For engineers, current source is an indispensable instrument. Many people also want to make a practical current source. The application of open source kits is just a complete set of PCB, components...[Details]
Foreign media reported recently that due to chip shortages, iPhone 13 production will be reduced by tens of millions this year, and the total production capacity will be lower than expected. However,...[Details]
PLC control system is an electronic device designed for digital operation in industrial production and is the core of industrial control. Today's PLC is no longer limited to logic control, but also...[Details]
1 Introduction The display and keyboard management device ZLG7290 with I2C bus interface is widely used in the interface design of intelligent instruments. In the specific application process, it ...[Details]
With the continuous evolution of LED materials and packaging technology, the brightness of LED products has continued to increase, and the application of LED has become more and more extensive. U...[Details]
The concept and working principle of servo drive
Servo drives are electronic devices used to control the movement of motors. They play an important role in many automation applications, such a...[Details]
As train speeds continue to increase, the requirements for train tracks are also getting higher and higher. The original insulated track circuit can no longer meet the needs of the development of r...[Details]
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