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$25 Computer runs Linux

Discussion in 'Electronic Design' started by Winston, May 13, 2011.

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  1. Winston

    Winston Guest

    "The large print giveth and the small print taketh away."

    --Tom Waits :)
    It's a complicated problem.

    Raspberry pi knows that the kids will never see *anything* that is
    likely be diverted by adults for their own use. Their USB/HDMI
    ARM board is much less likely to be 'repurposed' than would a fully
    featured notebook.

    Donated machines are guaranteed to be 'three of these, two of
    those, twelve of (Oh NO!) these. An unnecessary maintenance
    nightmare, yes?
    I concur, doctor. Hopefully there is an easy way to expand and
    connect it to many different peripherals.
    That is a very reassuring trend indeed. :)

    --Winston
     
  2. Winston

    Winston Guest

    Perhaps, though I detect a little 'mission creep' here. :)

    I'm enthusiastic about Raspberry pi's teeny little
    computer as a learning tool to the exclusion of
    a conventional notebook because of the increased
    likelihood that it would remain with the students
    and that if the absolutely worst (probable) thing
    happened, the whole platform is replaced Very Cheaply.

    The small size of the Raspberry pi computer is
    far less intimidating; easier to store and carry
    than a conventional notebook.

    I'm pleased that the instructors can become extremely
    competent with a *relatively* simple platform and not
    be distracted from supporting the students by
    notebooks that were 'gotten rid of'.

    Good on them!

    --Winston
     
  3. hamilton

    hamilton Guest

    You just have to carry a keyboard, mouse, 15" LCD monitor, wall wart for
    power.

    Yup, just as compact.

    In a laptop you do not get to see the computer, here its front and center.

    But, the cpu does not a computer make.

    A user need to see the output and see the input.

    But, with the camera, the computer gets to see you. ;-)
    (Hmmm, maybe that's the goal)

    hamilton
     
  4. Dick Tracy Wristwatch.
     
  5. hamilton

    hamilton Guest

    uuuummmm, 1984
     
  6. Winston

    Winston Guest

    JeffM wrote:

    (...)
    Once the work area is set up with peripherals,
    it's a matter of snapping in the USB and HDMI connectors.
    Shouldn't take more than say, seven seconds?

    --Winston
     
  7. Good observation. I wonder what the throughput to and from the USB HD
    drops to after all those brethren are teamed up with it.

    Still looks interesting. Let's buy 50 of them and set up a tiny
    supercomputer.

    Call it a "Well ARMed Midget Computer".
     
  8. Umm, 1984? Yer an idiot. It is not even out yet, idiot. It is a video
    transceiver. Show me even ONE that works from "1984".

    Folks do that NOW with their cell phones, but are too vane and blind
    to be able to drop to a wristwatch sized display.

    And hell, if yer going there, then it would be Willy Wonka.
     
  9. The ARM processor is already used in millions of consumer devices and
    washers, dryers, refrigerators, etc.

    You are not behind the curve, you never were with it, and have been
    guessing ever since. Must have been those years of spousal abuse that
    kept you from having time for more noble human pursuits.
     
  10. Winston

    Winston Guest

    Is that the USB-Hub'y looking thing on the right
    side of the picture? Nifty!

    --Winston
     
  11. legg

    legg Guest

  12. legg

    legg Guest

    Supposedly, all working off the 9V battery....

    Especially like that red wire wandering off towards the monitor.

    Are the six connections to the processor assembly for field
    programming?

    Might get more serious responses with a preliminary paper spec.

    Is that a web camera? Funny priorities in that budget.

    RL
     
  13. Winston

    Winston Guest

    legg wrote:

    (...)
    I see a rectangular box roughly the size of a 9 V battery
    but it has a USB connector on one end. Sound interface?
    I dunno about that but the computer, keyboard and mouse are
    powered from USB.

    (...)
    I think this is more in the way of a conventional 'press release'.
    They are fishing for contributions.
    Just an illustration of what *could* be done.
    Nothing wrong with that!

    --Winston
     
  14. Winston

    Winston Guest

  15. hamilton

    hamilton Guest

    Its a USB to Ethernet device. 10BaseT old style.
    Looks like a standard camera, that would be used inside of a web camera.


    Yes, more information would be nice.

    My SWAG:

    The powered USB hub shows the keyboard and mouse plugged into the top.
    The Ethernet box below that on the left side.
    The host port of the cpu board plugged into the port next to the power
    into the hub. ( USB hubs always have a single dedicated host input)

    I would like to know what the 6 wires are for soldered to the top of the
    board. The silkscreen states TP21, TP22 and GND.

    hamilton

    PS: My guess is this is faked.
     
  16. Winston

    Winston Guest

    hamilton wrote:

    (...)
    Based on ...?

    --Winston
     
  17. hamilton

    hamilton Guest

    Why didn't the Rasberrypi.org site show the backside of the board ?

    Why didn't they state which vendors processor they are using ?

    Why didn't they show a complete block diagram of the board, with part
    numbers ?

    Why have a camera on the first pass of the board and not a case ?

    The $25 price tab is just too hard to believe.


    hamilton
     
  18. Winston

    Winston Guest

    hamilton wrote:

    (...)
    It wasn't a hobby article. I saw it as a conventional press release.
    Raspberrypi hopes to uncover investors. That's the main purpose of
    the release.
    "The Raspberry Pi Foundation is a UK registered charity"
    (1129409)
    Doesn't matter for the purposes of the press release, yes?
    There is enough 'sizzle' in the phrase "700MHz ARM11"
    See above. Raspberrypi is looking for investors, not hobbyists.
    The camera module is only there to show how the board might be used.
    The example is provided as a means to stimulate the imagination
    of potential investors. Sales tool.
    Who knows? A non-profit producing electronics at-cost might
    be able to do that in large production runs. Their BOM
    does not look to be enormous. :)

    David Brabin is the guy behind the computer:
    http://en.wikipedia.org/wiki/David_Braben

    --Winston
     
  19. Probably a JTAG for the BIOS chip.
    What is? The whole board? The pins? You could be a bit more vague...
    just not today.
     
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