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Timing Diagram Tool?

Discussion in 'CAD' started by Jim Thompson, May 7, 2007.

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  1. Joerg

    Joerg Guest

    Ah yes, thanks, that was the Mexican computer. I wonder if some of the
    carbon copy sheets would be good enough for such jobs.
  2. John Fields

    John Fields Guest

    I was just kidding, and I wasn't referring to formal drafting. The
    premise was that if you can do logic design with an ink pen (ergo,
    no easy erasure available) then you must be able to get it right the
    first time out, ergo you must be a genius.
  3. Joerg

    Joerg Guest

    Whenever I was working up that uppity genius feeling gravity struck.
    There have been times where I had to use a razor blade more than once in
    the same spot. The first instance could be somewhat muffled by rubbing a
    fingernail over it but the 2nd razor application definitely showed. By
    the 3rd there was a hole...

    The ME guys had some kind of "cheat vellum" where you could peel off a
    layer and it almost looked as if nothing ever happened. Very expensive
    though but it did prevent the ink from frazzling out too much. Somehow
    many of them had more money than us EEs.

    abse seems to roll off the servers at a fast clip.
  4. John Fields

    John Fields Guest

  5. There's a lot to be said for sketching things freehand. Particularly if
    one is a visual/spatial thinker, it helps with the conceptualization

    Some years ago, I was responsible for maintaining a rather complex
    engineering document management an configuration control system (built
    in house). All of the diagrams in my documentation were done by hand on
    quad ruled paper. From time to time, management required that an
    'official' version be done by the CAD group, but I came to find out that
    the IT folks had taken to distributing copies of my drawings to the
    various support groups and shelving the CAD versions.

    One (new) manager had requested that the CAD group produce an overview
    data flow diagram by combining all the individual diagram pages into a
    single sheet. It was about 36x48 inches with small (10pt) font labels
    and symbols. The story was that as soon as he saw the system he was to
    take responsibility for on one page, he quit.

    My drawings were 8.5 x 11 sheets with each sheet being the data flow or
    E-R for a single event (weekly backup, new version checkout, etc.)
    making the system a lot easier to comprehend.
  6. Joerg

    Joerg Guest

    Tried Google as well, it seems to be gone from their servers as well. My
    email is jsc AT analogconsultants DOT com.
  7. What's that round thing in the top slot, a drop of solder flux?

    Here's a photo of the kind of thing:

    It's also an inexpensive source of small bits of SS shim stock. ;-)

    Hmmm. speaking of solder, Digikey seems to have jacked up their prices
    of 63/37 Kester '44' to *double* that of Mouser ($28/lb rather than
    $14/lb). Seems a bit much.

    Best regards,
    Spehro Pefhany
  8. JeffM

    JeffM Guest

  9. "Joerg" ...

    Normally that can be cured using
    On the Tools menu, click Customize.
    Click the Options tab.
    Select or clear the "List font names in their font" check box.

    Also, when an administrator installs the font while a user is logged in, the
    user cannot use it (Office does not show it) until the user logs out and in

    Arie de Muijck
  10. John Fields

    John Fields Guest

  11. John Fields

    John Fields Guest

  12. That is SOOOOOOOOOOOoooooo nice an image.
  13. jasen

    jasen Guest

    yeah, if you don't see fonts in control panel type it in the control-panel
    address bar.

  14. jasen

    jasen Guest

    3.5" floppy disks are too :)

  15. Chuck Harris

    Chuck Harris Guest

    Probably an RoHS thing. As I recall, if they allow *any* lead into their
    building, everything they sell is suspect for having lead contamination.

    RoHS manufacturers have to be very careful to not allow lead in their


  16. Google doesn't carry ANY of the binary groups.
  17. Absurd.

    Many mil contractors are exempt and have both technologies in house at
    any given time, and nobody is so retarded as to say that one contaminates
    the other.
  18. How would a pirate know?
  19. Eraser shield: 0.0038" SS (0.1mm?)
    3.5" floppy window: 0.014" plastic or 0.0073" SS

    Best regards,
    Spehro Pefhany
  20. Mark

    Mark Guest

    There is a package for Linux.
    "This software package provides a command line tool for documenting hardware
    and software designs through timing diagrams. It reads signal descriptions
    from a text file with an intuitive syntax, and outputs a timing diagram to
    an image file. Notation typical of timing diagrams found in the Electrical
    Engineering discipline is used, including arrows indicating causal
    relationships between signal transitions."

    It is a mainstream Linux package and should be easy to obtain. (It is part
    of the Debian distribution). SourceForge should certainly have it.

    Mark Walter
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