Smart home technology has been growing rapidly. More and more homes are adopting smart speakers like Amazon Echo and Google Home. Companies that once made simple home devices are now facing a demand f...
1. Senior Software Development Engineer/Software QA. Job Requirements: 1. Bachelor degree or above in Computer Science or related majors; 2. Must be proficient in C/C++ programming; 3. Familiar with e...
I recently drew Max232 and consulted a lot of information online. I got many versions. My personal analysis shows that T1 IN should be connected to TXD, T1 OUT to DB9's second pin, R1 OUT to RXD, and ...
[i=s] This post was last edited by Xiang Jing on 2014-4-2 10:52 [/i] Sun Mar 30 20:01:05 2014: The stack pointer for stack 'PdataStack' (currently XData:0x0181) is outside the stack range (XData:0x000...
When using serial port communication on the stm32 development board, the following error is displayed after compiling the program. ..\USART.axf: Error: L6218E: Undefined symbol __vfscanf_char_file (re...
This is my first time using this chip and I want to light up an LED lamp. The board has been soldered, and I have RS232 and JTAG emulator. But I don't know what to do next. How to write the program he...
In order to prevent traffic accidents, when the intelligent detection device of the car detects danger ahead, it must send a warning message to the driver. The voice alarm clearly reminds the drive...[Details]
This article discusses how to use an ultra-low-power RF transceiver chip from Zarlink Semiconductor for pacemakers, neurostimulators, drug pumps, and other such implantable medical devices to achiev...[Details]
The U.S. Food and Drug Administration (FDA) points out that home health care is the fastest growing area in the medical device industry. Driven by the increase in average life expectancy, the increasi...[Details]
Ultrasound systems are among the most sophisticated and complex signal processing instruments in widespread use today. Like any complex instrument, there are many trade-offs to be made in implement...[Details]
As a single-host multi-slave bus system, the number of slave devices that can be connected to a 1-Wire bus is almost unlimited. In order to avoid logical conflicts, the 1-Wire bus interfaces of all...[Details]
As the whole equipment is becoming increasingly miniaturized and power-saving, low-dropout linear regulators (LDOs) with low power consumption are becoming the mainstream in the market for linear regu...[Details]
Lithium-ion batteries have a high energy-to-weight and energy-to-volume ratio, no memory effect, can be recharged many times, have a long service life, and are becoming increasingly cheaper. A good...[Details]
Wireless personal area networks (or WPANs) are particularly useful for sensing, monitoring, and control applications. Cost-effective WPANs have the unique potential to implement wireless connectivi...[Details]
Complex circuits and 3D EM simulation tools have reached a point where complex system-level behavior can be simulated before fabrication. Performing EM simulations simultaneously with circuit simul...[Details]
There are many ways to attenuate signals. The most commonly used method is to divide the voltage using resistors. The common circuits are as follows:
Oscilloscope pre-stage attenuation c...[Details]
With the continuous emergence of new technologies and the increasing complexity of DSP real-time systems, there are more and more different types of external devices. Writing drivers for these exte...[Details]
Battery system architecture
For many years, nickel-cadmium batteries and later nickel-metal hydride battery technology have dominated the market. Lithium batteries have only entered ...[Details]
Nowadays, video conferencing has become a situation where multiple manufacturers supply various high-definition products. The technology of high-definition products has greatly matured, the cost h...[Details]
Preface
In the application of PLL, DLL and CDR circuits, people generally require the output clock signal to have a 50% duty cycle so that data can be sampled at both the rising and fallin...[Details]
0 Introduction
GaAs photocathode is a negative electron affinity photocathode with the advantages of high quantum efficiency, concentrated energy and angle distribution of emitted electrons. T...[Details]