Electronics Forum / Electronics / June 2009

anyone know where I can buy soft iron rods in various sizes and shapes?
 Seems to be a nightmare to find anything.
thanks.

Hello Members:
The University of Minho, in Portugal and Dare Institute in Cambridge,
MA are inviting potential participants from various backgrounds for an
online study on how adults differ in their reasoning of problems.  The

I installed a battery operated wireless door chime.
Button next to front door
bell in the kitchen. (18 feet approx)
The thing will not shut up, no matter where I place it,

I have "$10 OFF COUPON"" for RADIOSHACK.  In PDF-format, so can be
emailed/printed anywhere; BUT it is to be used in store only (not on
Radioshack website).
Also it expires on June11/2009, hence the reason I am selling -

I have a coil.  I want to accurately measure the amount of
energy/current that it uses when pulsed with one single square wave.   I
know I can take a voltage and current measurement and multiply them
together to get a wattage.    is that the only way?  is there such as

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You have probably seen this before, but I was just sent a video which
features a guy taking two candles, about 4" dia. X 3" tall, and sticking
a nail into the side of each one, then rubbing a magnet on each nail "to
magnetize it."

The others fell like domino's after HP caved in:
http://www.australianit.news.com.au/story/0,24897,25370534-15306,00.html
So, does the money get re-invested back into science research I wonder?
Dave.

Hello...first of all,sorry for my bad english...I need help. I am using a
program Micro-cap, i have one sheme (BBB4 VLF reciever) , and i need to put
that sheme in Micro-cap,but the problem is next: on the sheme there is a
microphone and headphones,and i dont know how to put that ...

Microsoft are apparently considering flash drives as an official install
medium for Windows 7
http://www.tomshardware.com/news/windows-7-usb-flash-drive,8148.html

tried googling  etc,,, any body  dot a data sheet for a TT2267 ?
thanks,'
mark k

My eyesight is not as good as it used to be, and trying to see copper on
khaki is very hard even at the best of times for me.
I have searched Farnell and a few others, but I cannot seem to find
green or other dark coloured copper clad boards.

I'm trying to get an old Loewe Colour TV going. I replaced a blown fuse, but
now I get a corona discharge at the top of the flyback transformer where it
shouldn't be.
Any definitive opinions as to the cause? Do I just need a new flyback

OK, new to this lark but have a basic idea what components do and I can
solder etc...
I want to experiment and create some LED lighting for a 20 inch deep, 16
inch across, hexagonal aquarium.  I want to use bright white LEDs and a few

[[Mod. note -- I have set followups to the poster.  If you think there
are more general physics-research-related issues, edit the followups line
as appropriate.]
-- jt]]