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The vortex flowmeter is a new type of flow measuring instrument made based on the "Karman vortex" principle. When a stable fluid flows through a straight pipe of a certain length, it hits a nonline...[Details]
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In recent years, mobile phones have developed to a very mature stage. Both the functions and performance can meet the needs of most people for 3-5 years. The main problem is that the battery and sc...[Details]
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Before the latest IEC61000-3-2 standard went into effect in 2005, most PC, monitor, and TV power supplies generated excessive power line harmonics when powered from single-phase 110 to 120V, 60Hz AC. ...[Details]
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Main highlights: 1. The digital tube uses 74HC595 as the segment selection driver, providing new ideas for beginners Minor highlights: 1. The key to communication using the compact STC15F104W MCU D...[Details]
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1. Design requirements: This course design uses MPX4115 sensor to detect pressure parameters. After ADC0832 performs analog-to-digital conversion, the single-chip microcomputer AT89C52 performs data ...[Details]
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On February 23, Tongfu Microelectronics stated on the investor interaction platform that about 80% of AMD's packaging and testing business is completed by the company. The company and AMD are long-...[Details]
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From the display technology point of view, LCD is a display screen composed of liquid crystals, while LED is a display screen composed of light-emitting diodes. Each pixel unit in the LED digi...[Details]
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The LED can be turned off by using the shutdown control pin of MAX684 or the enable control pin of MAX1916. For white LEDs with a forward voltage of 3.5 to 4.2V (at 20mA), a boost converter is usuall...[Details]
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The various parameters of integrated circuits generally have little effect on analyzing the working principle of the circuit, but they play an important role in circuit fault analysis and maintenan...[Details]
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Cold light source: Cold light source is a light source stimulated by chemical energy, electrical energy, bioenergy, etc. (fireflies, neon lights, LEDs, etc.), which has very good optical and flickerin...[Details]
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Flowmeter is one of the most widely used process measurement instruments in production sites. It can provide timely physical data for production process control and is one of the most basic equipment ...[Details]
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The 8051 microcontroller has two independent 16-bit up-counting timers named Timer0 and Timer1. This article is about using the 8051 timer to generate time delays. Delays can be generated using pure ...[Details]
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DDR
15 address lines 32k
128M*2(20)=2(27)
Check the 6410 chip manual;
5.4.3 DDR/MOBILE DDR SDRAM INITIALIZATION SEQUENCE
• Program mem_cmd in direct_cmd to ‘2’b10’,...[Details]
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There are many position sensor controls for brushless DC motors, but Hall-free closed-loop control is rare in Simulink. By understanding the Simulink model, you will have a deeper understanding of ...[Details]
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The reason for using assembly is very simple, that is, the efficiency of assembly code. When the machine starts, the efficiency of assembly is used to initialize the hardware and provide...[Details]