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    Angus Gratton

    projectgus.com · Personal blog · on HN since 2010

    Angus Gratton, an embedded engineer, writes teardowns and reverse-engineering notes on cheap hardware, old peripherals, and an EV conversion.

    Visit blogRSSHN submissions
    Hardware & ElectronicsOpen Source & LinuxRetro Computing
    What HN says

    HN links it for hardware teardowns and the Griffin iMate mystery. Commenters cite it on Android tablets and GPL compliance, and follow his EV series.

    Stats for nerds
    29HN people shared it
    31linked in comments
    1.8Kstory points
    Nov 2024last shared
    2010people per year2024

    Top posts on HN

    1. 1
      The motor turns too much
      1 person · 386 points · first shared 2024 · 192 comments on HN
    2. 2
      Anatomy of a cheap USB-to-Ethernet adapter
      7 people · 286 points · first shared 2013 · 74 comments on HN
    3. 3
      BMW F Series Gear Selector, Part Two: Breakthrough
      1 person · 186 points · first shared 2022 · 112 comments on HN
    4. 4
      Inside a $34 smartphone
      2 people · 169 points · first shared 2015 · 94 comments on HN
    5. 5
      BMW F Series Gear Selector, Part One: Failures
      1 person · 140 points · first shared 2022 · 89 comments on HN
    6. 6
      18 Months with a Framework 13
      1 person · 132 points · first shared 2024 · 91 comments on HN
    7. 7
      Mysteries of the Griffin iMate and the Apple Extended Keyboard II
      6 people · 127 points · first shared 2023 · 27 comments on HN
    8. 8
      $34 Smartphone Part II – Teardown
      1 person · 98 points · first shared 2015 · 34 comments on HN
    9. 9
      Sharing bikes in Shanghai
      1 person · 84 points · first shared 2017 · 23 comments on HN
    10. 10
      The risks of "$15 for $2097 worth of mobile internet"
      1 person · 60 points · first shared 2010 · 20 comments on HN

    What HN people wrote when they linked it

    • osterwoodMar 2018

      It's really anything branded as by "Apple" on Amazon.

      Look at the reviews of the Apple Thunderbolt Cable [1] -- 40% are 1 star reviews and many mention the cable being fake.

      Similar story on the Apple USB Ethernet adapter [2]. I bought one a few years back and it identified itself with Chinese lettering in System Preferences.

      Ken Shirriff did an amazing teardown of fake Apple chargers [3] and found a number of safety hazards relating to high voltage isolation. Teardown of the USB Adapter [4] found it used a part that doesn't exist (label does not match any known package for that IC).

      1: https://www.amazon.com/Apple-Thunderbolt-Cable-2-0-White/dp/B00YHUBV6Q/#customerReviews

      2: https://www.amazon.com/Apple-USB-Ethernet-Adapter-MC704LL/dp/B00W7W9FK0/#customerReviews

      3: http://www.righto.com/2014/05/a-look-inside-ipad-chargers-pricey.html

      4: http://projectgus.com/2013/03/anatomy-of-a-cheap-usb-ethernet-adapter/

    • NatsuFeb 2011

      You don't need VMs or a fake Google or anything that complex. That said, I will grant that it might be harder to detect or easier than reversing the protocol itself. Even so, take a look at what HN user angusgr posted in another thread:

      http://projectgus.com/2011/02/bing-google-finding-some-facts/

      I'll save you some reading and point out that this is the important part, the exchange with Bing:

      http://projectgus.com/files/googlebing/seaport-trace.txt

      I bet I could duplicate that with a few lines of Perl. Then I could feed Bing whatever I want, no VMs or clicking or DNS/hosts files to worry about. You might have to harvest a valid identifier (such as the one linked there) or do some figuring out so that you submit this to the right Microsoft IP.

      If I were working for Bing, I'd start looking at hardening this a little, before the SEO people figure it out.

    • angusgrSep 2013

      Freescale i.MX6 is a really nice platform. Shame it hasn't gotten broader traction, I think because it is moderately more expensive than its competition.

      Since May I've been using an imx6 based gk802 ($70 quad core "Android TV" stick) as a personal server (email, RSS, VPN, etc.) Has worked really nicely considering. (Blog post about installing debian on it: http://projectgus.com/2013/05/debian-installer-for-zealz-gk802-android-tv-quad-core-arm-minipc/ )

    • wolfgang42Jan 2024

      Somebody just last year finally worked out what that battery is doing and why the adapter doesn’t work after it dies: https://www.projectgus.com/2023/04/griffin-imate/#mystery-battery (discussed on HN: https://news.ycombinator.com/item?id=35772131)

      (TLDR: compatibility with Apple’s off-USB-spec keyboard power button, but the circuit they used accidentally injects noise which wreaks havoc on the data lines when it’s unpowered and left floating.)

    • schiffernNov 2024

      If you're interested in this check out the previous posts:

      Part 1 https://www.projectgus.com/2023/03/ev-conversion-one/

      Part 2 https://www.projectgus.com/2023/03/ev-conversion-two/

      Part 3 https://www.projectgus.com/2023/10/kona-can-decoding/

      ...and the follow-up posts:

      Part 5 https://www.projectgus.com/2024/04/unremarkable/

      Part 6 https://www.projectgus.com/2024/10/simplifying-bench-kona/

    • rgovostesNov 2024

      I spent a few minutes looking up whether a Mac could be booted from a Bluetooth keyboard but couldn't find any documentation of that. Back in the day some(?) Mac models could be booted by a USB keyboard, see https://www.projectgus.com/2023/04/griffin-imate/ for technical details.

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