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1. Matrix keyboard interface technology and programming
1. The structure and working principle of the matrix keyboard:
When there are many keys in the keyboard, in order to reduce the occupation of...[Details]
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This experiment did not add too much, it just added support for the input subsystem on the original basis. When a key interrupt occurs, an event will be sent to the kernel, so that it can be implemen...[Details]
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1. Reducing power consumption starts with MCU selection. When selecting, you should consider choosing a low-power MCU, such as MSP430, a CPU designed for low power consumption. 51 is strongly not r...[Details]
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Friends who have used STM32's SPI may find a problem, that is, its NSS pin cannot be automatically pulled high in hardware mode. This may be the reason why most friends prefer to use software to cont...[Details]
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Recently, one of China's most profitable gas stations has become a hot topic on the Internet. Its daily sales can reach an astonishing 4 million yuan, and its annual income is nearly 1.5 billion yuan...[Details]
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ams Osram and BiologyWorks, a US molecular testing organization, jointly provide fast, accurate and convenient molecular testing solutions for COVID-19 through spectral sensors
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At present, the power supplies in space technology, computers, communications, radars and household appliances are gradually replaced by switching power supplies. The series-adjusted voltage-stabil...[Details]
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At the just concluded 2014 CIGEE Smart Grid Construction Technology and Equipment Exhibition, representative manufacturers from the power industry and surrounding areas gathered together to showc...[Details]
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Following the disclosure of Xiaomi Group’s third quarter 2019 financial report, which brought certain benefits to its stock price, whether its full-year performance in 2019 can exceed expectations an...[Details]
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Since the project requires a large number of image fonts and audio files, NOR flash and NAND flash are plugged in. The burning algorithm STLDR (which contains several sections of code running in SRAM...[Details]
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According to foreign media reports, automotive vision technology innovator Foresight Autonomous Holdings is using advanced vision technology to improve 3D perception to increase accuracy and road saf...[Details]
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According to a research report by Accenture, the global Industrial Internet of Things (IIoT) market size is expected to exceed US$500 billion in 2020. Based on the current level of investment, the In...[Details]
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1. Basic knowledge of serial communication In actual industrial production or life, the computer's CPU needs to communicate and exchange data with external devices. All of this information exchange...[Details]
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introduction
In modern industrial control and some intelligent instruments, more and more places need to use dot matrix graphic displays to display Chinese characters. The usual way to display...[Details]
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This article details how to use an inexpensive 555 timer to replace a microprocessor to control a dedicated LED driver in applications where the full functionality of the LED driver is not required. ...[Details]
Test/Measurement
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