I would like to ask how to judge whether the GPRS module MC39I has been started? I made an ARM board that uses the GPRS module MC39I to access the Internet. The voltage of the MC39I vdd pin is 2.99V, ...
After graduating from school, I basically stay away from home, and I only spend about ten days at home every year. It has been more than ten years since I spent the Lantern Festival at home. How about...
[i=s]This post was last edited by lingxin_yuhe on 2022-8-24 10:29[/i]Preface: I have built the VScode+idf development environment. Later, I want to make a small demo of real-time time and weather disp...
0 Introduction
High-precision current source can provide high-precision current supply for precision instruments, and is suitable for automatic measurement tasks of various resistors in semico...[Details]
Direct digital frequency synthesis (DDS) has fast frequency switching and modulation capabilities and is widely used. However, when low power consumption and low cost are the main considerations, D...[Details]
As the electromagnetic environment in space becomes increasingly complex, the shielded cables used to transmit weak signals in the test system are easily affected by external electromagnetic distur...[Details]
During the operation of electronic equipment,
memory
failure or failure will not only lead to economic losses, but also may lead to catastrophic consequences. Therefore, memory testing has ...[Details]
In the process of designing electronic products, we usually control the cost of the designed products, always try to simplify the circuit, reduce the components, and simplify the installation process....[Details]
Abstract Aiming at the harm caused by mobile phone microwave radiation to human body and the incompatibility between mobile communication network and fixed-line network, a PSTN voice gateway using ...[Details]
Abstract Based on the overview of the hardware design of digital synthesis sweeper, this paper describes a USB2.0 interface design based on ISP1362, including the hardware structure design of USB i...[Details]
New processors in laptops place higher demands on power supplies: higher current, faster response to load steps, and faster adjustment of output voltage after the voltage identification (VID) code ...[Details]
0 Introduction
A wireless sensor network is a type of RGS system (remote ground sensor system). It is a detection system that uses a variety of sensors as comprehensive intelligence collection...[Details]
Introduction
While computer, Internet and communication technologies are developing rapidly, embedded system development technology has also achieved rapid development. This is not only reflect...[Details]
At present, the common motorcycle brake light source is still dominated by incandescent lamps, and the red light distribution lens is added to achieve the light distribution requirements. The disad...[Details]
In the construction of IDC computer rooms, the construction of power systems is undoubtedly the top priority. The development of various businesses and the stable operation of various servers are inse...[Details]
1. ARM Introduction (excerpt)
ARM (Advanced RISC Machines) is a well-known company in the microprocessor industry. It has designed a large number of high-performance, low-cost, low-power RISC proces...[Details]
Modifying a double potentiometer with a band switch
Use a KCV-11W2D ceramic band switch and 20 resistors, connect them according to the diagram, and you can assemble a practical do...[Details]
A variety of devices used to provide control or safety functions often require the use of current measurement devices. The most common method of measuring current through a circuit is to measure th...[Details]
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