I burned the system image and used the busybox file system. But when I tried to mount the USB drive, an error occurred.There is nothing behind sda.
How to fix this? Thank you!...
I want to use a transistor switch circuit to control the on and off of the sensor to reduce power consumption, but the current cannot be amplified. Please recommend a circuit...
This content is originally created by dcexpert , a user of EEWORLD forum. If you want to reprint or use it for commercial purposes, you must obtain the author's consent and indicate the sourceThis is ...
Due to the successive increases in market prices of chips, panels and raw materials, many home appliance companies have been unable to bear the cost pressure, and the price increases in the terminal m...
In mid-July, a piece of news that "Intel plans to spend $30 billion to acquire GlobalFoundries, the world's fourth largest chip manufacturer" was widely circulated. However, on July 20, GlobalFoundri...[Details]
For high-performance field-oriented control systems, speed closed loop is essential. Speed closed loop requires real-time motor speed. Currently, speed feedback is mostly detected by photoelectri...[Details]
Huawei launched the Honor 8S 2020 in the UK on June 5, which supports Google Play services and is priced at 99.99 pounds, or about 896 yuan. IT Home learned that compared with Honor 8S (...[Details]
0 Preface
Design requirements: 1) Able to detect alcohol concentration; 2) Able to pre-set threshold; 3) Threshold can be adjusted; 4) Sound and light alarm can be triggered when threshold is exce...[Details]
On May 8, the first long-term energy storage project in the province, the 500 kW/5 MWh all-vanadium liquid flow energy storage power station of Hangzhou Yifengge Clothing Co., Ltd., built by Linping B...[Details]
Realizing the vision of Industry 4.0 and self-adjusting assembly lines depends on the efficiency of power supplies. This article will explain how aspects such as power distribution, power quality and...[Details]
This year's iPhone XS and iPhone XS Max have added IP68 waterproof and dustproof functions, which means that the phone can stay in 1 meter of water for up to 30 minutes. However, some domestic users ...[Details]
I. Introduction In terms of performance, OLED screens have a relatively higher resolution, fewer pins, and occupy much fewer I/O ports. In terms of power consumption, first of all, OLED displays do n...[Details]
APFC (active power factor correction) technology is to replace the passive devices in the rectifier circuit with active switching devices or add a power converter between the rectifier and the lo...[Details]
Abstract: As an important part of the power system, the service life and safety and reliability of batteries are the focus of users. Therefore, this paper introduces the software and hardware desig...[Details]
A man stands in front of a wind turbine equipped with LED lights in Hanover, northern Germany, on September 5. The LED lighting installation was designed by French artist Patrick Renaud and was unv...[Details]
This article mainly explains the differences in the various "capacities" of mobile power banks. It also tells consumers who want to buy mobile power banks in the near future how large a mobile powe...[Details]
A standard way to configure the backlight is to use two discrete devices: a 100V MOSFET in a DPAK package, and a 100V Schottky diode, also in a DPAK package. The high leakage current of the Schottky ...[Details]
This project will teach you how to use the KY-037 Sound Detector Sensor with Arduino and measure the changes in sound intensity in the environment.
What can you learn?
KY-037 Sound ...[Details]