What kind of sensor can detect whether there is someone in the room? I used to watch "24" and it was very powerful. Is there any instrument that can achieve this in reality? Please tell me, experts?...
Fruit battery, no-load measurement 3V, about 100UA, then connect to MSP430 minimum system or connect a small SMD LED light, and measure the voltage and current at the two ends, just halved!, 1,.7 1.6 ...
/*Correspondence between keyboard functions and scan values (function in front, scan key number in the back) |--------|--------|--------|---------| |1 (0)|2 (1)|3 (2)|Select (3)| |--------|--------|--...
Our equipment has high-voltage discharge phenomenon, and the main unit equipment is discharged. The current confusing question is whether it is due to IGBT failure that causes overvoltage or overvolta...
Symptoms are as follows: The video is stored in the IDE device as an *.avi file. When the video ends abnormally (such as power failure), the generated .avi file can neither be opened nor deleted. I wo...
Hello everyone, I use 16-bit AD9268-125, sampling frequency is 62MHz, I use chipscope to store the digital signal after AD conversion, I want to import it into visualanalog for FFT analysis, but I don...
Sailing is gaining more and more attention. How to use modern technology to assist training and improve competition results is particularly important. Considering the real-time data collection in t...[Details]
1. Overview
Will passive devices
produce nonlinear intermodulation distortion? The answer is yes! Although there is no systematic theoretical analysis, it has been found in engineerin...[Details]
No matter which processor you are learning, the first thing you need to understand is the registers and working mode of the processor.
ARM has 37 registers, including 31 general registers and ...[Details]
1. What is temperature?
Heat is a type of molecular motion. The hotter an object is, the faster its molecules move. Absolute zero is defined as the temperature at which all molecular motion ...[Details]
Problems such as the depletion of natural resources, air pollution, traffic congestion, and rising fossil fuel prices have forced societies and individuals to seek alternative means of transportati...[Details]
With concerns about the growing energy crisis, motor efficiency has become an important and timely topic. This is because motors use 63% to 70% of the electricity produced in the United States and ...[Details]
Motors, especially those with brushes, generate a lot of noise. This noise must be dealt with if the appliance is to meet the requirements of EMC standards. The means to solve EMC are nothing more ...[Details]
Abstract: With the development and construction of BeiDou II system, China will shift from the situation dominated by GPS to the situation dominated by BeiDou II global navigation system independen...[Details]
At present, a large number of cooling tower fans, speed fans and special fans are in use in petroleum, chemical, pharmaceutical, metallurgical and other enterprises. Some fans have no monitoring in...[Details]
LED is the abbreviation of the English word. Its main meanings are: LED = Light Emitting Diode, a solid-state semiconductor device that can convert electrical energy into visible light. It can dire...[Details]
The power supply is the core component of a computer. Although it is not of high value, all computer components rely on the switching power adapter to provide energy, so the stability of a power su...[Details]
In industry, voltage 0…5 (10) V or current 0 (4)…20 mA is usually used as a method for analog signal transmission, which is also a method often used by programmable controllers. So what are the dif...[Details]
In the past 20 years, although the inverters that use power transistors (GTR) as inverter power devices, 8-bit microprocessors as control cores, and realize asynchronous motor speed regulation acco...[Details]
1. Overview
With the development of science and technology, PLC is increasingly used in industrial control. The reliability of PLC control systems directly affects the safe production and economic o...[Details]
1. Sensor
According to the national standard GB7665-87, a sensor is defined as a device that can sense the specified measured quantity and convert it into a usable output signal according to a...[Details]
Sensor
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