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Today, with the increasing integration of functions, mobile phones can also be used as portable media players (PMP), digital cameras, handheld computers (PDAs), and even global positioning systems ...[Details]
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introduction
Throughout the history of automotive lighting, power has always played an important role. Initially, cars only needed headlights to see the road in the dark. Later, other light so...[Details]
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Battery life is critical for portable applications. For applications such as smoke detectors, security devices, and thermostats, factory-installed batteries need to last for more than 10 years. The...[Details]
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I've been studying dot matrix recently. It looks simple, but it takes a while to master it completely! The 8*8 dot matrix hardware circuit I'm making now is like this. The row is driven by 74HC138 + t...[Details]
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At very low temperatures, certain metals and alloys lose their resistance to electric
current
and become
superconductors
. Two parameters that are often measured are the transition ...[Details]
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0 Introduction
High-precision current source can provide high-precision current supply for precision instruments, and is suitable for automatic measurement tasks of various resistors in semico...[Details]
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0 Introduction
Ultrasonic waves
are mechanical waves with a frequency of more than 20KHz, and the propagation speed in the air is about 340 m/s (at 20°C). Ultrasonic waves can be gene...[Details]
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Direct digital frequency synthesis (DDS) has fast frequency switching and modulation capabilities and is widely used. However, when low power consumption and low cost are the main considerations, D...[Details]
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As the automobile consumer market heats up, the safety performance of automobiles has attracted more attention from consumers. When driving at high speed, tire failure is the most worrying and diff...[Details]
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As the electromagnetic environment in space becomes increasingly complex, the shielded cables used to transmit weak signals in the test system are easily affected by external electromagnetic distur...[Details]
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Abstract Aiming at the harm caused by mobile phone microwave radiation to human body and the incompatibility between mobile communication network and fixed-line network, a PSTN voice gateway using ...[Details]
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Tags: Intelligent Video Video Surveillance HD Video
Currently, intelligent video analysis technology is gaining more and more attention in the security industry, and many projects have...[Details]
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New processors in laptops place higher demands on power supplies: higher current, faster response to load steps, and faster adjustment of output voltage after the voltage identification (VID) code ...[Details]
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Compared with other air conditioning systems, ground source heat pump systems have outstanding advantages. Since the temperature deep in the ground remains unchanged all year round, it is much higher ...[Details]
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At present, the common motorcycle brake light source is still dominated by incandescent lamps, and the red light distribution lens is added to achieve the light distribution requirements. The disad...[Details]
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