Edn.com
#71

EDN

Online edition of US print magazine. Electronics applications, products, technology and design techniques. Archived with free, full-text access. Range of free ...

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  • Enhancing drivers' eyes, senses, and reflexes with creative #electronics:

    Enhancing drivers' eyes, senses, and reflexes with creative electronics

    edn.com 18 May '17, 3pm

    Safety while driving is paramount when we think about all the different proposed electronics that will be going into modern automobiles. There are some nice electronics features that we enjoy in today’s cars like great audio systems, including digital radio, but when it comes to prote...

  • #OnThisDay in #TechHistory, gears were discovered on the #Antikythera mechanism, an ancient #computer:

    Gears are discovered on the Antikythera mechanism, May 17, 1902

    edn.com 17 May '17, 9am

    On May 17, 1902, a Greek archeologist noticed precision gear wheels embedded in an ancient artifact of corroded bronze and wood. The device would come to be known as the Antikythera mechanism, the oldest known complex scientific instrument. Discovered in 1900 on the wreck of an ancien...

  • When a new design exhibits timing bugs, troubleshooting reveals a dark side of light:

    Dark side of the light

    edn.com 14 May '17, 10pm

    I was trying to get rid of the last nasty bugs in my electronics system. My company builds laser systems, and this system was the latest in a series of small, handheld laser designators for a military customer. I had designed a small control board to operate the laser, and the softwar...

  • LTE-Advanced Pro: The bridge to #5G and testing

    LTE-Advanced Pro: The bridge to 5G

    edn.com 04 May '17, 8pm

    LTE-Advanced Carrier Aggregation (2CA through 4CA) : Carrier aggregation finally gets its place in the sun. The idea behind it is to use two-to-five carriers, each 20-MHz wide, to form either bandwidth block of up to 100 MHz (Figure 2 ). The carriers can also be sent across different ...

  • How smart is it to deploy smart meters on the smart grid?

    How smart is it to deploy smart meters on the smart grid?

    edn.com 12 May '17, 11pm

    Conventional power grids worldwide are beginning to strain against rising energy needs. Blackouts are increasing in number of occurrences. How can we improve these systems in a sustainable way? One possible solution, of which we have all heard, is the integration of information techno...

  • Switching and protecting electronics in #battery-powered systems

    Switching and protecting electronics in battery-powered systems

    edn.com 06 May '17, 5pm

    As seen, a bunch of discrete components and circuits are needed to implement comprehensive protection for battery-powered systems. At the same time, the quiescent current consumption of these circuits needs to be kept low so that battery run- and standby-time is not shortened. For exa...

  • Hindenburg disaster ends airship era, May 6, 1937

    edn.com 06 May '17, 2pm

    The Hindenburg disaster saw German passenger airship LZ 129 Hindenburg go down in flames during a docking attempt on May 6, 1937, shattering public confidence in such giant, passenger-carrying airships that had been described as engineering feats, and marking the end of the airship er...

  • This #DesignIdea offers up a battery-operated #LED lantern with multiple brightness levels:

    Multi-brightness LED controller draws zero off-current

    edn.com 28 Apr '17, 11pm

    At this time, the Q0 output from pin 3 sets the LED brightness to 25% as determined by R14 (Figure 2). Each push feeds a clock pulse to IC2.14, which increments the count. The second push makes Q1 go high, with R15 now setting the second dimming level to 50% brightness. R14 & R15 inje...

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