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The sound wave frequency exceeds the human hearing and the sound wave with a frequency higher than 20 kHz is called ultrasonic wave. The frequency of ultrasonic wave used for flaw detection is 0.4-25 ...[Details]
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Faced with the huge MCU race in the market, it is not surprising that MCU manufacturers cooperate with ARM. As the demand for Cortex continues to increase in the market, more customers hope to use a ...[Details]
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The paper designs and develops a hardware system of DDS sine wave signal generator based on AD9850, with a frequency range of 0~30MHz. According to the overall concept of software design and combine...[Details]
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With the development of electronic technology, MP3 players are developing towards large capacity and miniaturization. However, the integrated design of the player and the memory makes it difficult to...[Details]
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1 Introduction
With the rapid development of computer technology, electronic technology and communication technology, audio processing technology has also been widely used in many fiel...[Details]
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Sungrow, one of the world's leading manufacturers of photovoltaic inverters, announced that it has supplied its 60kW string inverters to a 2.25MW solar carport owned by Lockheed Martin (NYSE: LMT)....[Details]
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Innovation is the primary driving force for development. State Grid Corporation of China has always insisted on promoting scientific and technological innovation. Focusing on the strategic goal of ...[Details]
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1 Master-slave multi-machine communication
The so-called master-slave multi-machine system means that among several ARMs (or single-chip microcomputers), one is the master and the rest are...[Details]
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introduction
With global warming, environmental pollution, energy security and energy efficiency have become topics of concern to people. Achieving the coordinated development of energy, envir...[Details]
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Recently, the hydrogen energy storage project undertaken by Yunnan Electric Power Research Institute was completed. The first batch of hydrogen-powered vehicles in Yunnan were put into operation and t...[Details]
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Introduction
In industrial control, in order to ensure the reliable operation of the system, it is necessary to detect the surrounding environmental variables (such as temperature, air pressure...[Details]
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The latest quarterly report on global smartphone shipments from International Data Corporation (IDC) shows that despite disruptions caused by supply chain constraints and a global chip shortage, smar...[Details]
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A K-type thermocouple signal converter (IC) MAX6675 integrates signal amplification, cold-end compensation, and A/D conversion, and directly outputs a digital temperature signal, making the front-end...[Details]
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Single-phase full-bridge PWM rectifier circuit
Figure 1 Single-phase full-bridge PWM rectifier circuit
The figure shows the principle block diagram of the single-phase PWM rectifier circuit. I...[Details]
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Powering 20-30 white light-emitting diodes (LEDs) from three alkaline batteries presents an interesting problem with conventional boost converters. The required boost ratio and duty cycle are impracti...[Details]
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