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Based on the special environment of offshore oil spill recovery, this paper designs an offshore liquid level measurement system based on AT89S51 single-chip microcomputer. The system adopts the pri...[Details]
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Apple is expected to launch the successors of iPhone XS, iPhone XS Max and iPhone XR in September this year. The successor of iPhone XR may be called iPhone XR 2, and may have new colors such as gree...[Details]
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When I adjust the oscilloscope to the same order of magnitude as the PWM cycle, I can measure the standard PWM waveform. Then when I increase the oscilloscope cycle, I find that a magical waveform ap...[Details]
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The Ministry of Finance and other four departments jointly issued a notice on further improving the financial subsidy policy for the promotion and application of new energy vehicles. With the release...[Details]
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From October 29 to 31, the China Hydropower and Water Resources Planning and Design Institute hosted a review meeting on the preliminary design report of the Longquanshan Compressed Air Energy Storage...[Details]
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The competition among 17 photovoltaic enterprises and research institutes for the National Key Laboratory of Solar Photovoltaic Power Generation Technology has come to an end. On January 18, Dr. Bian ...[Details]
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According to Jiwei.com on November 17, vivo will release a new OriginOS tomorrow, but do you know what its Chinese name is? Regarding the above questions, vivo sub-brand iQOO product manager @戈蓝V gav...[Details]
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1. The DC voltage should be consistent
Each inverter has a DC voltage value, such as 12V, 24V, etc.
The inverter (Figure 4) requires that the battery voltage must be consistent with the inverte...[Details]
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The following code is a routine to use I2C library functions to read the temperature data of HTU21D. ret=HAL_I2C_Mem_Read(&hi2c1,0x80,0xf3,I2C_MEMADD_SIZE_8BIT,rx_buf,2,2000); if(ret == HAL_OK) ...[Details]
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The above two pictures correspond to; If you want to display at position 00, the command code is (0x80+0x00 or 0x80) #include reg52.h #define uchar unsigned char #define uint unsi...[Details]
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Thermistors are a type of sensitive components, which are divided into positive temperature coefficient thermistors (PTC) and negative temperature coefficient thermistors (NTC) according to their t...[Details]
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The electronics industry's relentless pursuit of speed and performance is changing the standard for high-end oscilloscopes. While bandwidth was once the "key specification" that customers and vendors ...[Details]
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At today's Honor 9X Kirin 810 technical communication meeting, Honor Vice President Xiong Junmin revealed that the Honor 8X, which was launched last year, shipped a total of 15 million units worldwid...[Details]
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According to CCTV Finance, the Hangzhou Xiacheng District Health Supervision Institute is currently piloting the "Transparent Cleaning Intelligent Supervision" system. In the pilot hotel, each piec...[Details]
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The basic working principle of PWM converter
The basic working principle of PWM converter
The working principle of PWM converter is shown in the figure. Due to the increase of switching freque...[Details]