How do I get the dynamic major device number from /PROC/DEVICES? How do I write a script? In which file should I write it? How do I run this script when Linux starts? Thank you!...
When importing OrCAD schematics and PCB files into AD14.0, it prompts "[color=rgb(51, 51, 51)][backcolor=rgb(252, 252, 252)][font=微软雅黑, "][size=24px]F[/size][/font][/backcolor][/color][color=rgb(51, 5...
Now I retested it, with the same board and the same program.Everything was fine with 149,but when I changed it to 2418, the current was 1.3ma, and it would often restart automatically...It's so frustr...
The sound signal produced by the AC sampling AD contains a DC component (which can be considered as zero drift), that is, a mixed level of AC and DC. It feels as if the DC component will change. We ca...
Common communication control circuits are included. For general 430 development projects, you can just copy the circuit schematic diagram. It includes 485 communication, current, voltage, frequency da...
The Nichicon Technology Subsite is now online, including EV/car solutions (capacitors), small lithium-ion rechargeable batteries, and a series of short films on "Capacitor Doctor". The content is rich...
With the promotion of the construction of intelligent communities in the country, anti-theft systems have become essential equipment for intelligent communities. Especially in recent years, the urg...[Details]
China's new energy vehicles are in a transition period from research and development to real industrial development. In 2012, with the intensive launch of new energy vehicle policy planning, the de...[Details]
In this article, the high-performance DSP developed by TI can be used as an effective confidentiality method if it is applied to PC encryption cards.
As an effective network security solution,...[Details]
Contact resistance
is the resistance to current flow through a closed pair of contacts. This type of measurement is performed on devices such as connectors,
relays
, and switches. The...[Details]
A standard cell
is an electrochemical
cell
used as a voltage reference standard in many electrical standards laboratories
. If properly maintained, standard cells are very stable. The ...[Details]
1 Introduction
PROFIBUS is an international, open, and manufacturer-independent fieldbus standard. It is widely used in manufacturing automation, process industry automation, and automatio...[Details]
1 Introduction to HART Protocol
HART (Highway Addressable Remote Transducer), an open communication protocol for addressable remote sensor high-speed channels, was launched by Rosemen in the U...[Details]
On the afternoon of July 10, Beijing time, Taiwan's largest chip designer MediaTek expects its smartphone chip shipments to grow by double digits in the third quarter of this year, and the company is ...[Details]
1 Introduction
In recent years, there have been many major advances in the production technology and processes of automotive headlights, which have greatly improved the performance of automoti...[Details]
12v Lead Acid batteries used in trucks, cars, RVs and uninterruptible power supplies are usually rated at 12V. This circuit monitors the battery, the charge and discharge curves, gives the cu...[Details]
Different initialization between C8051F and 80C51 series microcontrollers
In the past 30 years, major electronic component manufacturers in the world have launched their own unique single-chip...[Details]
We know that the inverter consists of two parts: the main circuit and the control circuit. Due to the nonlinearity of the main circuit (switching action), the inverter itself is a source of harmoni...[Details]
LED lighting: Basic circuit design can be completed in as little as one day
Semiconductor manufacturers are also getting involved in the LED lighting business. The power circuit of LED req...[Details]
0 Introduction
Under normal circumstances, the three-phase power in the power system is symmetrical, and they meet certain amplitude and phase conditions; but when the load changes, the syst...[Details]
Currently, each country is developing its own USB interface
charging specifications
, which leads to a major problem that a USB interface
charging
device manufactured in one country...[Details]