The electricity grid and rules required drive power LED characteristics, design and in the choice of LED drive power to take into account the following nine performance characteristics requirements: 1. High reliability, especially like the driving power supply of LED street lamps, i
Read moreHere we introduce a sound and light display stethoscope that can both hear and see the signal. The device uses a piezoelectric sensor and a signal amplifier to convert the heart beat into an acousto-optic signal. Stethoscope circuit with sound and light display:
Read moreFollowing the release of single-platter 1TB technology in May, Seagate finally announced the merger of its Barracuda line of hard disk drives, introducing the first single-disk 1TB technology into the desktop 3.5-inch hard disk drive: Previous Barracuda Green and Barracuda XT products Unif
Read moreWith the development of the Internet/Intranet, Ethernet has penetrated all corners. Users on the Internet have removed resources from geographical constraints and can browse industrial control site data on any computer on the Internet. "Control and management integration" is unma
Read moreThe industry has undergone major adjustments. The most pessimistic time has passed. In the first three quarters, the overall decline in the electrical equipment sector reached 31.1%, ranking the first in all sectors. A substantial adjustment reflects the expected slowdown in grid investmen
Read moreDesign of transmitting platform of pseudorandom code phase modulation radar based on AD9857 High-frequency ground wave radar is used for continuous large-area marine environment monitoring, which can detect sea surface dynamic parameters such as wind, waves, currents and tide
Read moreThe Xi'an World Horticultural Exposition was officially opened on April 28, 2011, with a duration of 178 days. The total area of ​​the park is 418 hectares with a total investment of 2 billion yuan. More than 100 domestic and foreign cities and institutions parti
Read moreAfter Yang Yuanqing took over Lenovo Group, he first targeted Apple. Yesterday, the mobile internet strategy and products announced by Lenovo Group were clearly aimed at Apple. Lenovo’s core tactic is to win by volume. Lenovo's latest "Le Yun" service can provide user
Read moreNovember 23, Beijing time morning news (Jiang Junmu) market research agency Juniper Research predicts that LTE mobile broadband technology will be rapidly popularized in the next five years, but the global coverage is limited. By 2016, the number of LTE subscribers will reach 428 million,
Read moreIn the afternoon of November 21st, Beijing time, Li Shigong, IBM's global vice president and chief technology officer of Greater China, accepted an exclusive interview with Sina Technology on Sunday to express his views on China's innovation environment and the develop
Read moreAbstract A U disk audio player based on STC12C5A60S2 is designed. The design idea and principle block diagram of the player are introduced. The specific implementation circuits are given for the three modules of the player, and the software program flow chart is provided.
Read moreWhat is the difference in the working nature of the triode and MOS tube when we do the circuit design: 1. Transistor current control, MOS tube is voltage control. 2, the cost of the problem: the triode is cheap, MOS tube is expensive. 3, power consumption problem: the triod
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