Electronics Forum / Electrical Engineering / November 2006

I have recently experienced issues where high amp devices will dim the
lights considerably (even resetting some appliances - phones,
computers, etc.) I had the utility company come out and he removed the
meter for testing and he took one look at the neutral connection and

Hi nice folks,
I have a question for the Gurus please. The usual expression for
the phase angle is angle = arc tan X/R. What is the expression for
phase angle as related to real and apparent power, also as related to

Can anyone please point me to a Web site or study available online that
discusses the actual radio frequencies that halogen lamps (particularly
120 Volt spotlights) emit. This is not about RFI in general but
specifically what frequency range is the RFI! Also, do you know if the

Does anyone know what material(s) fluoresce under infrared light?  For
those that are familiar with them, there are small plastic cards used
by TV technicians that will glow visibly when an infrared TV remote
control is pointed to a spot on the card in close proximity.   I am

Does anybody know of a source for 480v
50Hz single phase motors in the UK?
I would prefer new, to reconditioned.
Ted.

Is there a group for PLC Programmers to share ideas or ask for help?

Can someone help me: I need a FSK transmitter and reciever circuit.
thank you

Can someone tell me whether Wombats live only in Australia,
or also on other continents?
Apart from zoos, of course.
13

I saw a simple power supply schematic and the person used a 470uF
(polorized) and a 1uF (non-polorized) in parallel on the output of a
regulator.
I sent the person an email and he informed me he's seen it done that way on

Anybody can tell me how to make a Digital Speedometer, i would be happy
if someone can tell me properly with everything need to
make?..including PCB layout, circuit, calibartion stuff, etc.
regards,

I have an outlet controlled by a light switch in my bedroom that is
never used.  I would like to install some new recessed lighting that
would be controlled by this light switch.  I have very little
electrical experience, so any suggestions on how this may be done based

Note: This post is talking about UK (220-240V mains supply)
My girlfriend and I recently moved into our newly-purchased house. We
wanted to get the electric meter changed but when  the guy came out to
do so, he reported a live reading on the neutral block in our meter

I've removed a ceiling light fitting in the bathroom of my 'new' (built
c.1960) house, and I'm a little confused by the wiring - perhaps someone can
suggest what is going on -
The ceiling light fitting has three terminals, of which one is not used and

First I have to apologize if I posted this in the wrong group. If so
please direct me elsewhere.
I recently purchased a 1/3 hp motor on EBay. The motor is new, even
though it has been manufactured in 1983. I also verified this by

How does one determine the direction of AC power flow?
I understand how you can measure voltage and current with simple
instrumentation, but this is AC and the average value of those
parameters is zero. How can you tell in which direction the power is