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Emergency hand-held lamps powered by 6V maintenance-free batteries are widely used in rural areas. The charger used is a transformer step-down and single diode half-wave rectifier, and the charging...[Details]
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1 Introduction
Building Automation System (BAS) is a distributed monitoring system (DCS) designed according to distributed information and control theory. It is the result of the mutual de...[Details]
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1 Introduction
With the development of control, computer, communication, network technology, etc., a new control technology, namely fieldbus, has emerged in the field of industrial control...[Details]
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1. Introduction to CIF Board
Fieldbus integration based on PC system
Whether it is a master or a slave, fieldbus has won unanimous praise in the field of PC-based automation. For more...[Details]
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Portable power applications are broad and varied. Products range from wireless sensor nodes with average power consumption of only a few microwatts to in-vehicle medical or data acquisition systems...[Details]
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Today's automotive application developers face numerous design challenges as modern cars add more electronic functionality, while the need for lower power consumption and smaller printed circuit bo...[Details]
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After the development of the single-chip microcomputer application system is completed, the system often freezes at the work site due to noise interference, electromagnetic interference, overvoltag...[Details]
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With the development of communication technology, traditional analog walkie-talkies can no longer meet people's needs, and the digitization of walkie-talkies is imperative. The rapid development of...[Details]
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How to Test Semiconductor Diodes Cleverly
The diode test shown in the figure is simple and easy to perform, and the test is convenient and fast.
In the figure, T is a...[Details]
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Thermal simulation is an important part of developing power products and providing product material guidelines.
The trend of optimizing module form factor is the development of end equipm...[Details]
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1 Neutral point grounding method
In the early days, my country stipulated that the neutral point grounding methods of power systems should be divided into two categories: large grounding short...[Details]
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The figure below is a schematic diagram of a high-efficiency, high
-power-
factor
LED driver circuit
.
This circuit is developed based on HV9931 and adopts non-isolation me...[Details]
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0 Introduction
Usually,
a bandpass signal
can be represented by the corresponding baseband signal. For example, if Sm is used to represent a real bandpass signal, the bandpass signal can ...[Details]
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MIM is a sandwich structure consisting of three layers of metal, insulator and metal film. The MIM structure used for liquid crystal display is shown in Figure 1. There are two main types: (1) Figu...[Details]
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One diode makes fluorescent lamps start quickly at low temperatures
Ordinary fluorescent lamps are difficult to start at voltages of 200-170V or in winter. If a diode is added to the flu...[Details]
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