Electronics Forum / Electrical Engineering / June 2004

I live in Ontario, Canada, & Graduated with EE Bachlor degree
On June 2003. Ever since I graduated, I've NOT ( should NOT be surprising
to most people ) been able to find ANY job in the field of EE (Mainly
Because I've 0 Years of Industrial Experience, & my GPA is only B- ). I'm

Hello...here's a simple question.
What is it that makes the PC monitor
shake under the presence of a strong EMF
is it the magnetic or the electrical component

I know it is bad to put a fluorescent lamp in a dimmer socket.
My question is will it shorten the life of a lamp to put a fluorescent bulb
in a lamp with a 3 position switch?
I suspect that it does because the one I have tried in a desk lamp's life

I've got a battery charger for a power tool. Input voltage is spec'd at only
120 VAC.
Is it reasonable to think about modifying the switching p.s. to encompass 240
VAC as well? Or might one simply design an entire new one more easily (not

I have an idea but I don't know if it would work:
Assume I have a conventional 120-0-120V system but only the two live
wires are present. To get a neutral I put a center tapped
autotransformer between the wires.

I have just landed in Canada and I want to convert my laptop adapter
to 110V wall socket. My original UK adapter has a grounded plug.
I want to make the same in Canada.
In Canada there one of the holes is wider. Which one is the life wire

I have a 5 hp 230 V AC motor on a 20 gal tank /air compressor.
When given to me by the past owner, he said it needs a new electric motor.
Since I do not have a 240 line outlet in my home, as yet anyway. I plugged
this 230 v AC motor into a 120 V ac outlet, just to see what it will ...

I am building a wind turbine powered by rotating blades although
having a different configuration.  The diameter of the unit is about
20 feet.  Depending upon wind I am expecting 500 Watts to about
4 kW.

The standard voltages in the USA include:
240/120 single phase
240 (with 240/120) three phase delta
208Y/120 three phase wye

Bob Bemer, Computer Pioneer,
Passed Away This Week at Age 84.
See links:
 Posted on the home page of

I've developed a niche product for hobbyists that I'd like to sell in the
UK/Europe.
It is a home audio product, running at 9V DC, 500mA supplied by a CE-marked
wall wart. I understand the product must comply with EN 55013 and EN 55020.

Can anyone introduce some brand name for speed controller for ac motor ?
 Those which can generated variable frequency ac for driving ac motor ?
I have a electrical platform here, the controller is suffering aging
problem and has no support from manufacture anymore as it was ...

Actually, I have no plans to build it.  I'm just curious what one would
have to do to build one.
Obviously, I need a lot of amps.  But how many do I really need?
What voltage would I need as a minimum?

Help! I wanted to change a three switch box to a four switch box. I've
swapped the box successfully, but now I need to reconnect the switches. I
thought I eyeballed the connections before I undid them, but I can't seem to
make them work properly.

Assume your boss walk up to you one day and ask you to do some work on a industrial
setting.  No inspection what he is asking of you may get someone killed and at least
damage several thousand dollars of equipment.  What do you do?