Electronics Forum / Electrical Engineering / January 2005

I have a small fan that is used to exhaust air from a work station. It runs
on 12v DC 4.5 amps.
I was told that there are four ways to effectively power this fan on
household current, and do so safely.

Using the student version and it's great for my purposes. I am currently
working on building a HighPass filter and modeling it with this tool.
When I add an OpAmp741 the physical diagram inputs (+-) are in opposite
positions to the schematic I am working with and in fact opposite to ...

I have been requested by a client to provied a wye-wye pad-mounted
transformer that is grounded on both the primary and the secondary.
The voltages are 12470Y/7200 VAC to 208Y/120 VAC.  I remember there
being some reason why this is not typically used for distribution

I have a BYTEK S15-F Multiprogrammer, but cannot find a source for
manuals/software. Does anyone know where these can be downloaded, or
does anyone have originals they could copy for me? I'd really
appreciate it and I would be more than willing to paypal you a few

http://disc.server.com/discussion.cgi?disc=149495;article=74791;title=APFN
William Thomas
Electromagnetic weapons "tests" in Iraq
Tue Jan 25, 2005 18:53

Does Matlab, Octave, or Fortran do calculations in different bases like a
base 8 or Hexadecimal base 16?
Brian White

Who makes a continuous online UPS with 240v in 120v out?
By "continuous online" I mean that there is a an AC to DC stage followed
by appropriate paralleling with the battery followed by DC to AC.
By "240v in 120v out" I mean that the AC to DC stage is designed for 240

Anyone know where i could get a "demo" :) copy of Fortran 90/95/03?  Thanks
Brian

The Neutral and Ground bus in a subpanel that was installed in a remodel are
not connected, however the guy left the bar bolted into the neutral bus and
left the other side hanging without a bolt.  Basically, he did not bolt the
bar down onto the ground bus.  When the electrician ...

I can't seem to get the correct gain when I use a bypass cap on the emitter.
wouldn't my formulas be the following:
1. calculate the impedance of Ce which would give me Xc.
2. calculate the parallel resistance of Re and Xc.

Hello: I am interested in becoming an assistant to a Private of
Corporate Electrical Engineer that runs & owns  his or her own business.
I am highly unconventional, but i have conventional training and 20+ yrs
experience in commercial & residential work.... I would like to do some

what is the function of a motor saver? Why not use a classic circuiti
breaker as siemens 5SY74167 for example? Thanks.

I noticed when putting a new van on my video card that a couple of the
capacitors are bulged and even have a yellow discharge.
I don't think I'm going to like the answer to this post.
Thankyou

This PC power supply is spec'd at 640 amps inrush current at 115v
(100 amps at 230v):
http://www.antec.com/specs/Neo480_spe.html
That would definitely blink the lights.  I wonder how long that lasts.

Something has puzzled me for some time and the question
comes back to me from time to time; not that it is important
for circuit design, I'm just curious - I have seat-of-the-pants
models for valves (Tubes to the Yanks), semiconductor