I want to DIY a mobile power bank. The power management chip uses TP4222 as the charging and discharging chip. The circuit is built according to the typical circuit. After soldering the components, I ...
1. Confirmation of the board frame diagram (provided by the structural engineer). Design can only start after the board frame diagram is OK . After the PCB design is completed, the structure needs to ...
I use ea development kit lpc4088, with a S25FL032 SPIFI FLASH on board. I set up J-LINK download in KEIL, and there is a 407x/8x SPIFI. But the range is 0x28000000-0x28400000, but the manual and chip ...
1. Four quadrants, use two orthogonal axes to divide the plane into four parts, namely four quadrants; 2. The two axes are given different meanings, or represent parameters with different meanings. At...
With the rapid development of urban economy, elevators are increasingly used as a vertical transportation tool. However, elevator fault detection and maintenance, especially the role of elevator remot...[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]
LED is the abbreviation of light emitting diode, which is an electric light source made of semiconductor technology. The core part of LED is a chip composed of P-type semiconductor and N-type semi...[Details]
The automotive lighting and signal control system is responsible for controlling the vehicle's lighting, signal lights, electric horns, reversing and brake buzzers. Traditional automotive lighting...[Details]
The typical fault troubleshooting listed below is for reference of maintenance personnel.
When the computer is turned on, the indicator light is off and there is no screen display
Mainte...[Details]
Motors are important products that convert electrical energy into mechanical energy to achieve automation, and they are widely used in industrial control, medical electronics, white a...[Details]
It is well known to automotive suppliers that automakers are demanding more from their supply base. For connector suppliers, this means stricter requirements for product performance, stability and ...[Details]
The era of mobile access to the Internet has arrived, and it will rapidly change the business and infrastructure needs of mobile operators under a whole new trend of requirements. We need 4G LTE to...[Details]
Since AC mains power may experience power outages, voltage sags and surges, continuous undervoltage and overvoltage, and frequency fluctuations during supply, these factors will affect the continuous ...[Details]
There are many types and styles of digital voltmeters in design and development. Traditional digital voltmeters have their own characteristics. They are suitable for manual measurement on site. Tra...[Details]
Designing low power circuits while achieving acceptable performance is a difficult task. Doing so in
the RF
bands increases the challenge dramatically. Today, nearly everything has wireless...[Details]
The biggest advantage of Profibus is that it is guaranteed by the stable international standard EN50170 and has been proven to be universal in practical applications. It has been widely used in man...[Details]
The programmable controller directly controls the stepper motor, which can significantly reduce the cost of the control system of the modular machine tool automatic production line. The article int...[Details]
The 8051 microcontroller is the most common microcontroller we have. I have been using 8051 for a long time and have also taught microcontroller courses for a period of time. Here I would like to s...[Details]
1. Why do we need to do electromagnetic compatibility design for products?
Answer: To meet product functional requirements, reduce debugging time
,
make products meet the requirements o...[Details]
Microcontroller MCU
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