dje@datacube.UUCP (10/15/87)
>The hot chassis used to be common in TV sets, but it went out when solid >state components took over. Modern sets have power transformers (usually >more than one) just like other pieces of electronic equipment. Most sets >have polarized plugs, though; these minimize shock hazards from leakage. Be careful: This is not necessarily so. Many solid state sets just rectify the 110 to create 170VDC which is used directly by the horizontal flyback circuit. Then they tap off lower voltages for other circuitry. This apprach is ultra cheap as it has no AC power transformer. Some use a switching supply which is non-isolated. Dave Erickson ---------------------------------------------- ------ Datacube Inc. / /| 4 Dearborn Rd. ------ | Peabody, Ma 01960 || \| | ihnp4!datacube!dje || /|/ Human:(617)535-6644 ------ Fax: (617)535-5643
phd@SPEECH1.CS.CMU.EDU (Paul Dietz) (03/09/88)
Due to the overwhelmingly positive response I recieved in reference to
posting schematics in binhexed MacPaint format, I thought I'd get the ball
rolling! So here's a file containing a library of components. It was
originally created for use with MacDraw (probably the prefered program
for doing schematics) but I have saved it in MacPaint format. I suspect
that more extensive libraries will be posted from time to time. This is
just the basics: MOSFETS, bjt's (aka "real transistors"), R's, L's, C's,
diodes, op-amps, and some other goodies.
This will probably start a flurry of mail saying "Now that you posted it,
how do I read it?" If you have a Macintosh, you will need to go through
the following steps:
1. Bring a copy of this file over to your Mac. This is traditionally
done with Kermit.
2. Run BinHex version 4.0 or later on the file.
This will create a MacPaint document with the component library.
Enjoy!
Paul H. Dietz ____ ____
Dept. of Electrical and Computer Engineering / oo \ <_<\\\
Carnegie Mellon University /| \/ |\ \\ \\
============================================ | | ( ) | | | ||\\
"If God had meant for penguins to fly, -->--<-- / / |\\\ /
he would have given them wings." _________^__^_________/ / / \\\\-
<cut here>
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j!,N!Z3#j!,N!Z3#j!,N!Z3#j!,N!Z3#j!,N!Z3#j!,N!Z3#j!,N!Z3!@2!!!!:phd@SPEECH1.CS.CMU.EDU (Paul Dietz) (03/09/88)
Just thought I'd head off some of the flames :^) Several people suggested alternate formats for posting schematics. PostScript seemed to be the most reasonable of these, however, PostScript previewers are not generally available yet. The great majority of respondants agreed that for the moment, MacPaint format was the most universally acceptable. Several people also pointed out the existance of MacPaint format translators for a variety of systems, including PC's, Xwindows, imprint, etc, etc. Remember: this is only supposed to be a stop gap measure until somebody (*it could be you!*) desings and implements a general schematic transfer format. Since I am not familar with the various translators, this would be a good time for knowledgable people to step forward and post their experiences! (But do keep in mind that this is sci.electronics; we don't really need to know the inner details of the MacPaint format, etc.) Maybe we can wipe out character graphics schematics forever! (I am the dreamer, aren't I?) Paul H. Dietz ____ ____ Dept. of Electrical and Computer Engineering / oo \ <_<\\\ Carnegie Mellon University /| \/ |\ \\ \\ -------------------------------------------- | | ( ) | | | ||\\ "If God had meant for penguins to fly, -->--<-- / / |\\\ / he would have given them wings." _________^__^_________/ / / \\\\-