How are *official* schematics presented?

A tasy little Windoze app:

On a sunny day (26 Jan 2007 11:23:41 -0800) it happened "JeffM" wrote in :

It runs OK in wine. I installed via the install shield.

Do you use TIFF for file size? PDF should be on par with TIFF with LZW or CCITT compression. Plus, PDF always looks pretty no matter how much you zoom in. If you really want small, try JBIG2 Lossy or JPEG2000. Here's my file size test results for a moderately full D-size schematic. All, except for the PDF, are bit-mapped images.

PDF/JBIG2: 42.8kB (using JBIG2 Lossy) PNG: 97.2kB TIFF/CCITT4: 110kB (Zips down to 87kB) PDF/CCITT4: 111kB (Zips down to 89kB) PDF: 119.2kB (vector graphics, not bit-mapped) TIFF/LZW: 126.4k

I just use the PDF converter in OpenOffice and on a typical schematic it comes out much larger than TIFF. But my designs are mostly analog so the graphics are a bit "weirder" than the usual logic blocks. So mostly I come close to 1MB in PDF. Doing another one right now and I'll try different PDF structures on this one. Let's see.

It's probably one of the few SI units that does NOT get used in practice (to my knowledge). To answer your first question, it's a Newton per square meter. I've seen it used in some school textbooks, but not elsewhere.

Uh, those are pretty commonly used in high vacuum work. 760 Torr is 1 atm. And meterologists seem to like millibars, at least in the U.S. A bar is within 1 or 2% of 1 atm. Oddly, I'm giving you all this from memory ... didn't look up or use Google for any of it ...

You're welcome,

Mark

Or 125/200th of a millimeter for a TSSOP :-)

Sorry, but in Australia:

hectoPASCALS have been used for pressure charts, for many many years now. (apparently the same as millibars) Therein lies a hint that Pascals are a direct unit of measure against bar ! ie 1000 * 100 = 100,000 Pa = 1 bar

You can pump your tyres up to a specified kPa value - lets just say

A truly metricated world WE live in and DO use in practice.

On Fri, 26 Jan 2007 12:42:50 -0800, Joerg wrote in Msg.

You should stay with vector graphics all the way for PDF. You can export your schematic as PS and convert that to PDF.

Although Eagle seems to have truly weird PS output. I just tried it -- exported an A4 schematic as 300dpi PNG -> 80K. The same schematic as PS came out closer to 1MB.

I'll have to investigate that because it doesn't make any sense at all.

robert

Check this out:

I have converter on every machine without installing anything.

- tero

Well I'll be a ... That's what I get for not looking it up :-)

Mark

On Fri, 26 Jan 2007 19:52:34 GMT, Jan Panteltje wrote in Msg.

Have you tried the native Unix app, "units"? It converts everything into everything, even doing some basic arithmetics if necessary. Gas mileage example (my 1995 Golf):

~$ units

You have: 6.7 l/100km You want: mpg reciprocal conversion * 35.106654 / 0.028484628 You have:

robert

On a sunny day (27 Jan 2007 16:36:05 GMT) it happened Robert Latest wrote in :

Very nice, did not know that, there are thousands of apps in Linux / Unix, I learn a new one every day :-) Unfortunately it could not understand my celcius to F conversion request 'help units' scrolls slow in 'more', no I prefer that GUI program.

That's pretty much the ratio I have experienced, about 10:1.

Eagle doesn't have too many export options. bmp, png, pbm, pgm, ppm, tif, xbm and xpm. Oh well, but TIFF works fine. My clients can read that, it produces nice and crisp large plots for lab work and the file size is small.

Yikes, that's not right! Sounds like it's storing an uncompressed bit map. I use Orcad SDT's (yep, the old DOS program) PS plotter driver and then convert to PDF via Ghostscript. You may want to experiment with one of the add-on PDF printer drivers that use GhostScript. I'm using PDFcreator for my Windoze machines, but many other packages out there work just as well. I've avoided OpenOffice as it doesn't deal with vector graphics on my EMF formatted graphs properly for some reason.

The truly amazing format is JBIG2 or JPEG2000 Lossy compression. I can't see any difference between a lossless bit map schematic and JPEG2k Lossy formats. JPEG2k Lossy makes ratty scans look better most of the time.

I use my HP11C for that. Runs on three coin cells for a decade, easily.

yeah, it only works with units that are ratios or reciprocal ratios.

Bye. Jasen

it's too small to be much use (it's about 1mm of water in a u-tube manometer)

yup, A torr is 1 mm of mercury (assuming a standard gravity)

Blood pressure is measured in the same unit, (or a unit of the same magnitudde atleast).

a bar also happens to be exactly 100000Pa, Meteorologiists over here have shifted to "hectopascals" which are merely millibarrs by another name.

Bye. Jasen

No, it produces even pretty legible PS, true vector graphics. But why so huge -- I don't know. Maybe it's because of all the vector font text.

robert

Not really, PNG is much smaller for line art than either ps or pdf, let alone typical tiff. If you want to "shrink" the file size of line art try gif; all the patents are expired now.