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According to foreign media AndroidCommunity, Samsung recently pushed a system update for its annual flagship mobile phone Galaxy S21 series, but many users immediately reported that the power consump...[Details]
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introduction
X1226 has the functions of clock and calendar. The clock relies on hour, minute and second registers to track, and the calendar relies on date, week, month and year registers to trac...[Details]
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1) TEXT_OFFSET The kernel's starting position in RAM is offset from the RAM starting address. The value is 0x00008000 。/arch/arm/Makefile 111 textofs-y ：= 0x00008000 112 textofs-$（CONFIG_ARCH_CLPS711...[Details]
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Machine automatic imaging technology has become a mature, accurate and reliable measurement tool that can be used in many fields such as automobiles, biotechnology and communications. At present, with...[Details]
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According to foreign media reports, Pioneer Smart Sensing Innovations Corporation (PSSI), a subsidiary of Pioneer Corporation, is developing the next-generation 3D lidar sensor with a measurement dis...[Details]
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Developing a good optical heart rate monitoring solution for wrist-based wearables can be a challenge for many designers. After all, it’s a complex endeavor that requires optical and mechanical exp...[Details]
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I recently bought a NanoPi M1 board from FriendlyArm, and applied for a NanoPi NEO board online. Both are Crotex-A7 quad-core ARM development boards based on the Allwinner H3 chip. The two boards can...[Details]
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Line pre-drive circuit
The row drive tube generally works in a switch mode. There are two ways to drive the row output tube: one is to make the row output tube conduct, and the row dr...[Details]
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Semiconductor supplier STMicroelectronics (ST; NYSE: STM) will participate in the 2020 Munich South China Electronics Show (November 3-5). With the theme of "STMicroelectronics, Technology Starts wit...[Details]
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Researchers have developed a quantum key distribution (QKD) system based on silicon photonics that can transmit secure keys at unprecedented speeds. QKD transmitters (pictured) combine an optoelect...[Details]
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In principle, photoelectric detection technology can detect all non-electrical quantities that can affect the amount of light and light characteristics. It can transform the non-electrical quantity...[Details]
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Method 1:
Give the circuit a square wave signal, and use an oscilloscope to observe the square wave signal, from which you can obtain certain frequency response characteristics.
Method 2: ...[Details]
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Feature Request: 1): The green light has a 25s countdown. There is a 5s yellow light time when the green light transitions to the red light. The red light will directly turn green after 25s. 2): Pres...[Details]
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The 3.5mm headphone jack was once a must-have for mobile phones, from feature phones to smartphones. In recent years, mobile phone manufacturers have phased out the 3.5mm interface. LeTV even ...[Details]
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Single-phase full-wave controlled rectifier circuit
Figure 2-9 Single-phase full-wave controlled rectifier circuit and waveform Single-phase full-wave and single-phase full-controlled bridg...[Details]
RF/Wirelessly
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