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The author used the components at hand to make a video doorbell (see the attached picture for the circuit), which works well and is now introduced to audiophiles.
When switch K is off, it is a no...[Details]
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Abstract: Abstract: Bluetooth technology can be used to connect personal computers, mobile phones, PDAs, digital cameras, printers, TVs, air conditioners, washing machines and other household a...[Details]
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Many people compile projects with Keil5 without errors or warnings, but a red cross appears on the right side of the program, as shown in the figure below This is because Keil has added a new sy...[Details]
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On August 27, Tsinghua Unigroup announced that it would invest in a factory dedicated to the manufacture of 12-inch DRAM memory chips. The factory will start construction at the end of this year and ...[Details]
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The report shows that Tesla Powerpack is profitable and reducing grid costs. Image credit: Tesla
South Australia’s massive Tesla Powerpack battery array has recouped nearly 25 ...[Details]
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1 Introduction
Fingerprint recognition technology analyzes the local characteristics of fingerprints and extracts detailed feature points to reliably confirm personal identity. The advantage o...[Details]
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1. Introduction
The technology trend in in-car entertainment systems is becoming increasingly complex. Simple audio systems that send audio data over copper cables are a thing of the past. Com...[Details]
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Apple today released new iOS and iPadOS 12.5.4 updates, and the new software is aimed at older devices that cannot run iOS 14 updates. The update to iOS and iPadOS 12.5.4 is currently available for...[Details]
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O Introduction
With the development of economy, people's requirements for security are getting higher and higher. The security industry is developing rapidly, and its application scope is also expa...[Details]
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Displays and light bulbs typically emit light in more wavelengths and directions than what the user sees. Apple is looking to minimize the energy that is not seen and not used, thereby produci...[Details]
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introduction Fault recorder is an important automatic device to improve the safe operation of the power system. When the power system fails or oscillates, it can automatically record the changes in v...[Details]
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Dual Channel Double Side Demodulator
The dual-channel dual-band demodulator is shown in Figure 5.4-77. The circuit is composed of two sample-and-hold circuits with exactly the same structure. Its s...[Details]
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1. Introduction The STC15W401AS series MCU is a MCU produced by STC with a machine cycle (1T). It is a new generation of 8051 MCU with wide voltage/high reliability/low power consumption/super anti-i...[Details]
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In use, a dedicated ground resistance tester is expensive and inconvenient to purchase. Can I use a multimeter to measure the ground resistance? The author used a multimeter to conduct experiments ...[Details]
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DELIXI is a well-known electrical equipment manufacturer, and its inverters are widely used in the field of industrial automation. DELIXI inverters have many models, and the fault code of each mode...[Details]
MCU
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