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Anyone with Raspberry Pi ModelB experience

Discussion in 'Electronic Design' started by [email protected], Apr 15, 2013.

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  1. Guest

    Have any of you electronics gurus worked with
    the Raspberry Pi model B board ? I am a newbie
    with this SBC, and I am running into various
    problems. If someone has had any experience
    configuring and making it work, I would like
    to discuss the issues I am facing, and for
    which I do not have any solution.
  2. Andrew Holme

    Andrew Holme Guest

    wrote in message

    Yes; but no promises. What issues?
  3. Jasen Betts

    Jasen Betts Guest

    There's a newsgroup comp.sys.raspberry-pi but there's also
    some of us here who have used it.

    Getting a powersupply that's good is critical, and getting
    the right SD card helps too.

    if you're doing this on your own, having some linux
    command-line experiance will help.
  4. Joerg

    Joerg Guest

    Weird, my news provider ( doesn't carry that. At
    least not yet. So I just requested that they adopt it.

  5. Guest

    First of all, I have used Linux for
    almost 2 decades now, and have it on
    both my work machine(CentOS) and my
    home laptop(Fedora 17). So I am very
    confortable with Linux command line
    and use the 'dd' command to write the
    SD card.
    I started with OpenELEC-arm 3.0.0 and
    I use a 1.25 Amp 5.0Volt power supply.
    I use the composite video output with
    a Sony Bravia TV as monitor. The board
    would re-boot in an infinite loop. The
    OpenELEC logo would come up, followed
    by the XBMC logo, followed by a colorful
    screen with a menu bar across it. Then
    the above steps would repeat over and
    over. The device would not respond to
    any mouse or keyboard input. I re-flashed
    the SD card a few times, but nothing changed.
    I changed to OpenELEC 2.99.5, and now
    the board does not re-boot over and over,
    provided I press the 'keyboard's Esc key
    once the colorful screen comes up, but it
    pretty much ignores the keyboard. Also,
    once the colorful screen is on for a few
    minutes, it goes into a sort "gryed-out"
    appearance, and the device does does not
    respond at all.
    So, first of all I would like to get the
    device to a state where it respond to
    mouse and keyboard input, without any
    freezing over. I believe the power supply
    has more than enough juice for the board
    to support the mouse, keyboard etc.,
    Any hints, suggestions would be of immense help.
    Thanks in advance.
  6. Andrew Holme

    Andrew Holme Guest

    wrote in message
    Is it a rev 1 or rev 2 board? There have been issues with IR drop across
    resettable fuses. Rev 2 has a single resettable fuse at the 5V input. Rev
    1 had two additional resettable fuses down-stream, powering the two USB
    sockets. Some USB keyboards draw surprisingly large currents. On a rev 1
    board, I found it necessary to replace the USB fuses with wire links when
    using a Wi-Fi dongle. Obviously, doing so invalidated my warranty! Some
    people use powered USB hubs.

    You might also try the standard Raspbian distro to start with, just to
    check-out the hardware setup.

    I'm developing an embedded application on a "head-less" Model A. Head-less
    means no monitor connected, going in over SSH and FTP. Initially, I had to
    connect an Ethernet cable; but now I have Wi-Fi configured.
  7. Jasen Betts

    Jasen Betts Guest

    I'm using a powered hub both to power the raspi and to run the main
    peripherals, mine's revision 1, unmodified, so I can't back-feed
    the power
    another way to configure them is to pull the SD card and plug it into
    a reader on a real computer and just edit it there. (easier on a linux
    desktop than windos, but I hear thet there are tools for windows that
    can handle ext2fs)
  8. Guest

    IME a robust and stable power supply is critical to Pi functionality. Can't beat a 5A linear supply connected by short leads via the pi's GPIO pins.
    You say you're happy with your PSU but have you examined the voltage levels under test conditions? The pi has a very narrow range of supply voltage it will work with and the symptoms you describe sound PSU related to me. Been there; done that.
  9. rickman

    rickman Guest

    I get sick of this kind of rudeness in the groups. if you don't have
    anything useful to say, why not keep it to yourself?

    My apologies to Vladimir Vassilevsky for stealing his MO.
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