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  • EEVblog #600 – Opamps Explained

    Posted on April 6th, 2014 EEVblog 32 comments

    The most often requested video! Dave explains what Operational Amplifiers (OpAmps) are and how they work. The concepts of negative feedback, open loop gain, virtual grounds and opamp action. The comparator, the buffer, the inverting and non-inverting amplifiers, the differential amplifier, and the integrator circuit configurations are also explained.
    Then a practical breadboard circuit to demonstrate a virtual ground and the effect of voltage rail limitations.
    All EEVblog Opamp related videos are HERE

    Forum HERE

  • EEVblog #599 – 5 years of the EEVblog

    Posted on April 4th, 2014 EEVblog 38 comments

    The EEVblog is 5 years old today!
    Just a quick thanks to everyone who has supported me and the blog.

  • EEVblog #598 – Sony DME7000 Video Multi Effects Processor Teardown

    Posted on April 3rd, 2014 EEVblog 4 comments

    What’s inside a professional Sony MDE7000 Video Effects Processor, as used in TV stations and video production facilities?
    This one was used in the Foxtel TV1 TV station before it was shut down end of 2013.
    Dave also discusses high density PCB design issues and methods, and systems engineering.
    Spec Sheet:
    User Manual:


    Forum HERE

    High Res teardown photos:

  • EEVblog #597 – Fluke 114 Kit Multimeter + Sparkfun/Fluke Rant

    Posted on March 31st, 2014 EEVblog 74 comments

    Fluke 114/117 Kit Multimeter for hackers, makers, and hobbyists.
    Tweet @FlukeCorp if you want to get on the list for one:
    Use the hashtag #FlukeKit
    Or ask on their Facebook page

    Dave comments on the Sparkfun/Fluke multimeter customs trademark/trade dress fiasco, and shows off the new low cost Fluke 114/117 Kit Multimeter about to be released.

    The Sparkfun blog post
    Flukes Trade Commission Exclusion Order
    GIVEAWAY: I’ll be giving this multimeter away to the most needy – but only if you bothered to read this video description!
    So if you want it, leave a comment saying why you should have it.

  • EEVblog #596 – World’s Cheapest Soldering Station – Yihua 936

    Posted on March 30th, 2014 EEVblog 22 comments

    Dave takes a look at the world’s cheapest temperature controlled soldering station, the $16 Hakko 936 knockoff Yihua 936 from Hobby King.
    How does it compare to the older genuine Hakko 926?
    Also, thermal capacity comparison testing is done on those two irons plus the high thermal capacity JBC.
    Sagan also gives his verdict.

    Hakko 936 Schematic
    Forum HERE