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Timing Diagram Tool?

J

Joerg

Jan 1, 1970
0
Phil said:
Nah, that was Teledeltos paper. It was electrically conductive, with a
sheet resistance of something like 10k ohms per square. You cut it with
an X-Acto knife, put a voltage across it, and it solved the 2D Laplace
equation for voltage drop vs position pretty well. I went looking for
some a few years ago--it had been picked up by a British outfit,
allegedly, but they didn't seem to have any for sale any more.

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

John Fields

Jan 1, 1970
0
At the university we were forced to use ink pens. The tricky ones from
Rotring or Staedtler that would only work if held at exactly 90 degrees
to the vellum, would leak a lot and dry up in no time. Plus ruin the
occasional shirt. Same during the internships that were mandatory. So
yeah, I kind of got used to that.

---
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.
 
J

Joerg

Jan 1, 1970
0
John said:
---
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.

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.
 
J

John Fields

Jan 1, 1970
0
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.
 
P

Paul Hovnanian P.E.

Jan 1, 1970
0
Joerg said:
Arie's hint is great. But it'll be lots of typing. If it isn't for doc
purposes but just for mutual understanding there is an easier way. This
Saturday me and my layouter (with him being in Vermont) just could not
get onto the same page with a weird kind of laser diode mounting
(z-bend, then rotate a bit and lay flat over some discretes).

So I sketched it up, scanned that in and zipped it over. Tada! Problem
solved, layout is now done. But the fab people haven't come back with a
quote for hours now. Hope that doesn't spell trouble.

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

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.
 
J

Joerg

Jan 1, 1970
0
John said:
---
The file's nearly a couple of megabytes long, so maybe your ISP has
some rules which are keeping you from getting it.

If you like, send me your email addy and I'll email it to you.

Tried Google as well, it seems to be gone from their servers as well. My
email is jsc AT analogconsultants DOT com.
 
S

Spehro Pefhany

Jan 1, 1970
0
....

I posted it here (abse) as "Eraser shield and friend."

What's that round thing in the top slot, a drop of solder flux?

Here's a photo of the kind of thing:
http://www.danielsmith.com/products~cat~700~sku~224+090+010.asp

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
 
J

JeffM

Jan 1, 1970
0
A

Arie de Muynck

Jan 1, 1970
0
"Joerg" ...
Thanks, Arie. Just tried it in MS-Word. Works nicely. Just in case someone
wonders: It doesn't show up as XWave but just two brackets in the font
list, way at the end.


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
again.

Regards,
Arie de Muijck
 
J

John Fields

Jan 1, 1970
0
John Fields wrote:

Tried Google as well, it seems to be gone from their servers as well. My
email is jsc AT analogconsultants DOT com.
 
R

Rev. 11D Meow!

Jan 1, 1970
0
That is SOOOOOOOOOOOoooooo nice an image.
 
J

jasen

Jan 1, 1970
0
My Computer -> Control Panel-> Fonts and drag & drop the ttf file in,
it should install.

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

Bye.
Jasen
 
C

Chuck Harris

Jan 1, 1970
0
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
doors.

-Chuck
 
T

The Great Attractor

Jan 1, 1970
0
Tried Google as well, it seems to be gone from their servers as well. My
email is jsc AT analogconsultants DOT com.


Google doesn't carry ANY of the binary groups.
 
T

The Great Attractor

Jan 1, 1970
0
RoHS manufacturers have to be very careful to not allow lead in their
doors.

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.
 
T

The Great Attractor

Jan 1, 1970
0
There's a lot to be said for sketching things freehand. Particularly if
one is a visual/spatial thinker, it helps with the conceptualization
process.

How would a pirate know?
 
S

Spehro Pefhany

Jan 1, 1970
0
3.5" floppy disks are too :)

Bye.
Jasen

Eraser shield: 0.0038" SS (0.1mm?)
3.5" floppy window: 0.014" plastic or 0.0073" SS



Best regards,
Spehro Pefhany
 
M

Mark

Jan 1, 1970
0
Jim said:
Anyone know of a cheap (or free) Timing Diagram tool?

I need to communicate with my digital counterparts on an IC design ;-)

...Jim Thompson
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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