extern:
extern can be placed before a variable or function to indicate that the definition of the variable or function is in another file, prompting the compiler to look for its definition in other mo...
My ADS1220 circuit is shown above. I used STM32F767 originally, and the circuit diagram uses 3.3V.
The STM32F407 I'm using now uses 5V.
The force value of the original program was a bit inaccurate. Th...
Why do smart water meters use disposable 17450 (or other models) lithium batteries? Why not use rechargeable lithium batteries? Is it because of price or some other factor?...
In the digital world, both personal and business environments cannot do without the Internet. Computers, smartphones, and printers all need to connect to the network for communication, and Wi-Fi wirel...
After the motor parameters are configured, we still need to learn several mathematical models.
(1) Mathematical model of voltage equation.The circuit model of the voltage equation is as follows:Accord...
During use, the instrument will cause certain malfunctions due to its own operation and environmental problems, which will have a certain impact on the normal use of the user, so the maintenance and ...[Details]
Data from Qichacha shows that on August 27, Jiangsu Xinde Semiconductor Technology Co., Ltd. had a change in investors, with the addition of ten institutional shareholders including Hubei Xiaomi Chan...[Details]
The immersion level transmitter is directly put into the measured medium, which is very convenient to install and use. Solid structure, no moving parts, high reliability, long service life, high-prec...[Details]
1. Basic Introduction 1-1: The "low power mode" of the microcontroller is like the standby mode of a mobile phone. It is different from the normal operating mode and is in a state of saving power and...[Details]
24C02: 256-byte EEPROM. Generally, EEPROM has a lifespan of 300,000 to 1 million times. Devices based on the I2C communication protocol. I2C is a communication protocol with strict communication timi...[Details]
In Part 1, we introduced different LED lighting technologies used in capacitive sensing UI applications through real-world use cases. Now we will look at different ways to implement pulse width modul...[Details]
The trend of adopting lithium-ion rechargeable batteries (hereinafter referred to as lithium batteries) in hybrid electric vehicles (HEVs) has begun to expand. Compared with conventional nickel-metal ...[Details]
According to the published European electric vehicle sales data, in March, the number of electric vehicle registrations in Europe reached a record high of 59,741, up 38% from the same period last yea...[Details]
According to foreign media techpowerup, South Korean company SK Hynix obtained the ISO 26262: 2018 FSM automotive semiconductor chip safety certification on November 11. This certification was issued...[Details]
SolidRun has announced a new line of system-on-modules (SOMs) designed with automotive telematics and the Industrial Internet of Things (IoT) in mind, built around NXP’s i.MX 8XLite sys...[Details]
Hybrid DVR can capture the video stream of encoder or IP camera through the network and store it on the hard disk space of DVR. Hybrid DVR is to adapt to the transition from DVR to NVR. Since both ...[Details]
The interaction between devices and the bus in the GPIB system is defined as interface functions. The GPIB standard defines 10 interface functions, including 5 basic interface functions and 5 auxil...[Details]
With the continuous development of China's economy, the demand for energy and raw materials is growing, making the entire petrochemical industry develop rapidly at an alarming speed. In petrochemical...[Details]
Pay attention to the applicable conditions of rebound test
The rebound method is a method of calculating the strength of concrete by testing the surface hardness of concrete with a rebound tester. Wh...[Details]
"From the new medical reform plan, the dominant idea of the current national medical system has changed from treatment-oriented to treatment and prevention-equally important. Therefore, in the fiel...[Details]
DSP and ARM Processors
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