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  • eevBLAB #10 – Why Learn Basic Electronics?

    Posted on May 27th, 2015 EEVblog 3 comments


    A reddit user asks what is the point in learning basic electronics these days when you can do everything with off the shelf modules and boards like Arduinos and the like.
    They make it super easy to build stuff, so why does anyone need any knowledge of basic electronics any more?

    Forum HERE

  • EEVblog #747 – PC Based Logic Analyser Project

    Posted on May 25th, 2015 EEVblog 4 comments


    Dave goes back 20 years and find an old PC Based Logic Analyser project of his that was published in Electronics Australia magazine back in 1996. He uncovers the original timing diagrams, schematics, and prototype. And tries to resurrect the old Borland Pascal 7 source code and Lattice ispLSI PLD chip code.
    And the old Protel Autotrax for DOS PCB and schematic files.
    Will it all work 20 years later?
    A bonus side detour into the venerable Tektronix TDS210/220 oscilloscope.

    Original articles
    Original design notes

    Forum: http://www.eevblog.com/forum/blog/eevblog-747-pc-based-logic-analyser-project/

  • EEVblog #746 – Sharp X68000 Retro Computer Teardown

    Posted on May 20th, 2015 EEVblog 5 comments


    What’s inside the a 1987 vintage Sharp X68000 personal computer / gaming system from Japan?
    Sold exclusively in Japan from 1987 to 1993 this 10MHz 68000 based boasted graphics capability superior to the Amiga and Atari ST. The powerful graphics enabled pixel-perfect ports of clasic games arcade games, and the machine was highly sought after by gamers. Running a custom operating system called Human68K, it even had 3D goggle support.

    Forum HERE

    Datasheets:
    Sharp Microcontrollers databook
    Yamaha YM2151
    MB81C78A
    MB81C78A
    MB81256
    MC68901
    M51387P
    HD63450

    Hires teardown photos:

  • How To Live Stream A USB Webcam On a Raspberry PI 2

    Posted on May 19th, 2015 Seppy 13 comments

    The EEVblog Lab had a HD Dropcam so that people could watch what was happening live in the lab. It worked well enough, but then Dropcam changed their terms and conditions and wanted to merge with Nest (who bought them). This was bothering Dave so the search for an alternative began.

    Surprising, there are very few options on the market that:
    a) Allow low frame rates in order to reduce upload bandwidth (The lab ISP has a monthly bandwidth cap)
    b) Are low enough power and work completely autonomously
    c) Don’t cost an arm and a leg
    d) Provide the ability to embed the stream into a public website so people could watch without having to go another site.

    We had spare Logitech webcams (UVC ones should work fine, H264) which were  that would provide good image performance, so it was simply a matter of finding a hardware and software solution to match. A Logitech C905 was used in the final solution even though we had better C920’s, they will be saved for use as the live show cameras.

    Read the rest of this entry »

  • EEVblog #745 – Mailbag

    Posted on May 19th, 2015 EEVblog 4 comments


    Mailbag time again. Dave opens his mail. What random stuff awaits?
    Forum HERE

    SPOILERS:
    Marble Run video below
    A vintage Japanese Sharp X68000 video game home computer from the 1980’s
    Teardowns of an industrial controller, a LED light controller, ABB industrial switchmode power supply, Casio FX-3800P programmable calculator, old Gossen digital multimeter and a German analog meter.
    Belgian chocolate.
    Surprise visit by Sagan
    Two Kickstarter Projects:
    Femtocow USB912
    Bluetooth Audio Link (BAL)
    A solar powered propeller hat and electronics business card http://shop.asmyldof.com/
    ICL7136 Multimeter chipset