Electronics Forum / Electronics / January 2008

My house is pre-wired for 5.1 surround sound with what seems to be
good quality multi-strand wires.
My "home theater in a box" receives these wires at the back of the sub-
woofer into small holes with some clip-like plastic things. (I am sure

I've got an 18v battery drill whose pack is just about completely dead. I've
been thinking about repacking it, but I'd really like to use
high-performance NiMH batteries in place of the current NiCads. The question
is, will the existing temperature sensor still work for ...

I've been looking at Keithley application notes for the Franck-Hertz
experiment. Some of them show voltage sources that seem to be opposing
each other. I don't know much about stuff like that, but I'm under the
impression that one doesn't really want to have voltage sources opposing

Simple question, where can I find the longest lasting rechargable AA
batteries? And what would be the best charger to get?
Thanks
Michael (who's sick of his torch going flat while night diving :-)

I'm trying to use a 555 to generate a reset pulse ~1ms on power application.
Have the "usual" configuration with timing cap from pin 2/6 to pin 1 (ground),
charging resistor pins 2/6 to Vcc pin 8.  As this is a once-off pulse, DISCHARGE
pin is open (no function required).  RESET is ...

Would appreciate some help.
Was thinking of using a car radio at home. Specs read current
consumption 1.5A (at .5W).
The fuse is 5A.

Why not?!
http://www.n4g.com/gaming/News-102874.aspx
Dave.

   Does anyone know if there is a dehumidifier, instead of using
a humidistat setting,  allows you to set the time on and the time off?
   Example: Set the dehumidifier to run for a half hour, then be off
for an hour.   This cycle repeats over and over.

I want to start experimenting with motors and gears. (Small scale.
Maybe half tbe size of my old RC car motor or smaller) Unfortunately I
live on a small island :-) and I think I may find it difficult to get
the parts.

Would appreciate some help.
Was thinking of using a car radio at home. Specs read current
consumption 1.5A (at .5W).
The fuse is 5A.

Hello, I have a 12v dc space heater that I use in my truck when I go
on trips. I only use it during the night (average about 6 hrs per 24
hr period). The heater is 300w.  I have it hooked up to a separate
sealed12v car battery which means it's drawing 25 amps!   This sucks

TVs, cameras, VCRs.............................

I have a dead AA Coppertop battery. I think there are things one can do
with the rod in a battery, e.g. carbon arcs, although I don't know how.
I won't ask about experimenting with the chemicals in the battery since
I've already directed that question to sci.chem.

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I don't know if this is the right NG to ask about the following:
I have a Sony DAV-FX500 5.1 home theater now installed which works very well
for our fairly medium sized room.  I was surprised to see the wire size to
four of the speakers as small as it is.  The wire size to the two ...