Re: Battery powered switch

From: Genome (genome_at_nothere.com)
Date: 08/19/04 

Date: Thu, 19 Aug 2004 13:11:15 GMT

"James" <ltffekblpddw@mailinator.com> wrote in message
news:Xns9549DF4F98AFCltffekblpddw@216.196.97.133...
| It is similar to that. Basically we have a small (for lack of a
better
| word) outlet box near a back wall of our building. The outlet box
actually
| houses connections to a set of external speakers that have been wired
| throughout parts of the building. There isn't any power that is
running
| through the outlet box (I suppose we could run power there, but the
cost of
| getting someone to do that would far exceed the amount of money I want
to
| spend on this). Anyways, each speaker throughout the building has its
own
| power switch so if we wanted to turn off the sound in, say, my office,
I
| could just flip off the speaker itself. The outlet box door is pretty
well
| surrounded by equipment in the storage room, so getting into the box
is
| somewhat of a pain as you try to maneuver around equipment, etc., so
for
| the most part, I just leave the radio on all day long, and let people
turn
| off their speakers when they don't want to listen.
|
| Recently, I have really been the only one using the radio (it just
plays
| sports radio all day long), so I can pretty easily turn on/off the
radio
| whenever I want -- but only if I can get inside the box.
|
| Anyways, long story short, I want to be able to set up a remote system
| where I can just send some kind of remote signal from inside/just
outside
| the storage room to the receiver inside the (blocked or closed) outlet
box.
| The receiver should take any incoming signal and allow me to
| connect/disconnect the radio from its battery power source. Finally,
the
| receiver should run on battery power (since there isn't a readily
available
| power source) and shouldn't require too much power since it will
basically
| need to be on at all times. If I only needed to get to the box once
every
| few days or a week to change the battery on the receiver, that'd be
good
| enough. As it is, I get about a 14 hours on the radio with the 9volt,
| which means I am either changing the battery daily, or going in to the
| outlet box several times a day.
|
| TIA,
|
| James
|
| Jonathan Kirwan <jkirwan@easystreet.com> wrote in
| news:1ks7i0dlu2dle4mm0nb82no9394r6d3i6m@4ax.com:
|
| > When I read it, I was kind of imagining a "barn situation"...

I'd suggest you figure out how the speakers are actually wired.

If it's not a '100V' system with transformers and the speakers are in
parallel then you might consider moving the radio to your office and
connecting it to your speaker terminals.

Such a method may be feasible even if transformers are used, your
speaker transformer becomes the main one.

Anyway there must be a way of achieving what I'm suggesting.

DNA