Temperature alarm-phone line?

[Dean]

I'm trying to find a piece of equipment to be able to monitor the
operation of the A/C in an air-conditioned room.

I remember there was a type of thermostat made which used to plug into the
phone line. It was for heating, and they used to use them in areas where
people had heated cabins. It plugged into the phone line and mounted on the
wall. If the temp dropped below 50, it would close a set of contacts and
you'd get a busy signal if you called the phone. In really cold weather
you'd call daily, and if you got a busy signal you'd know there was a
problem with the heat.

I need the reverse. We're away a lot, and live in a hot, humid area.
If the A/C fails, we'll have a problem with mold, etc. I want to be able to
check that the temp is BELOW a certain number, say, 80 degrees.

The unit doesn't have to be able to dial the phone, just a "yes/no"
indication would be good enough.

Anyone familiar with this stuff?

Thanks,
Dean

[Abby Normal]

If you are away a lot you may want a home security system. I thermostat
could be wired as a zone.

The alarm panel would call the service. The monitoring service could call
you, a service contractor etc, a friend or relative etc.

Post by Dean
I'm trying to find a piece of equipment to be able to monitor the
operation of the A/C in an air-conditioned room.
I remember there was a type of thermostat made which used to plug into the
phone line. It was for heating, and they used to use them in areas where
people had heated cabins. It plugged into the phone line and mounted on the
wall. If the temp dropped below 50, it would close a set of contacts and
you'd get a busy signal if you called the phone. In really cold weather
you'd call daily, and if you got a busy signal you'd know there was a
problem with the heat.
I need the reverse. We're away a lot, and live in a hot, humid area.
If the A/C fails, we'll have a problem with mold, etc. I want to be able to
check that the temp is BELOW a certain number, say, 80 degrees.
The unit doesn't have to be able to dial the phone, just a "yes/no"
indication would be good enough.
Anyone familiar with this stuff?
Thanks,
Dean

[Mark Monson]

Post by Abby Normal
If you are away a lot you may want a home security system. I thermostat
could be wired as a zone.
The alarm panel would call the service. The monitoring service could call
you, a service contractor etc, a friend or relative etc.

Post by Dean
I'm trying to find a piece of equipment to be able to monitor the
operation of the A/C in an air-conditioned room.
I remember there was a type of thermostat made which used to plug into the
phone line. It was for heating, and they used to use them in areas where
people had heated cabins. It plugged into the phone line and mounted on

the

Post by Dean
wall. If the temp dropped below 50, it would close a set of contacts and
you'd get a busy signal if you called the phone. In really cold weather
you'd call daily, and if you got a busy signal you'd know there was a
problem with the heat.
I need the reverse. We're away a lot, and live in a hot, humid area.
If the A/C fails, we'll have a problem with mold, etc. I want to be able

to

Post by Dean
check that the temp is BELOW a certain number, say, 80 degrees.
The unit doesn't have to be able to dial the phone, just a "yes/no"
indication would be good enough.
Anyone familiar with this stuff?

Never heard of this kind of set-up before but it should be pretty easy to rig up.
You'll need a phone and a cheap non mercury ( because it will be attached to a box
instead of the house) air conditioning thermostat. The cord from the telephone is
split to expose the red wire ( only the red and green wires are needed for the phone
to work). The phone is left off the hook and the red wire is cut and wired to the
thermostat. As the temp rises above the set point of 80 degrees, the contacts
close. This completes the connection to the phone which being off the hook will
give a busy signal. You could use a resistor instead of the phone after figuring
out the right value but most people have a cheap phone lying around already.

MM

MM

Post by Abby Normal

Post by Dean
Thanks,
Dean

[Winston]

Post by Dean
I'm trying to find a piece of equipment to be able to monitor the
operation of the A/C in an air-conditioned room.
I remember there was a type of thermostat made which used to plug into the
phone line. It was for heating, and they used to use them in areas where
people had heated cabins. It plugged into the phone line and mounted on the
wall. If the temp dropped below 50, it would close a set of contacts and
you'd get a busy signal if you called the phone. In really cold weather
you'd call daily, and if you got a busy signal you'd know there was a
problem with the heat.
I need the reverse. We're away a lot, and live in a hot, humid area.
If the A/C fails, we'll have a problem with mold, etc. I want to be able to
check that the temp is BELOW a certain number, say, 80 degrees.
The unit doesn't have to be able to dial the phone, just a "yes/no"
indication would be good enough.
Anyone familiar with this stuff?
Thanks,
Dean

Know any electronics geeks?

You could configure this circuit to call you and say when the critical
temperature is reached:

http://www.circuitcellar.com/library/ccofeature/petruzzellis1099/index.asp

--Winston

[Bennett Price]

Post by Dean
I'm trying to find a piece of equipment to be able to monitor the
operation of the A/C in an air-conditioned room.
I remember there was a type of thermostat made which used to plug into the
phone line. It was for heating, and they used to use them in areas where
people had heated cabins. It plugged into the phone line and mounted on the
wall. If the temp dropped below 50, it would close a set of contacts and
you'd get a busy signal if you called the phone. In really cold weather
you'd call daily, and if you got a busy signal you'd know there was a
problem with the heat.
I need the reverse. We're away a lot, and live in a hot, humid area.
If the A/C fails, we'll have a problem with mold, etc. I want to be able to
check that the temp is BELOW a certain number, say, 80 degrees.
The unit doesn't have to be able to dial the phone, just a "yes/no"
indication would be good enough.
Anyone familiar with this stuff?
Thanks,
Dean

I think you want to go to Radio Shack or some other alarm company
supplier and get an auto-dialer. E.g.,

http://www.home-technology-store.com/detail.aspx?ID=1200
http://www.smarthome.com/7962.html

These gizmo's call several phone #'s, (until one answers), and deliver a
prerecorded message. Normally they are triggered by a burglar alarm
(door opening, window breaking, etc.) or a small battery operated
wireless panic button but could easily be triggered by an air
conditioning thermostat - closes contacts on heat rise.

[Dean]

Thank you for the links. I may have found what I'm looking for.
Might have to do a little "modification", but if it works when it's done
I'll be proud of myself.

Dean

[Kirstin03Koly]

replying to Dean, Kirstin03Koly wrote:
In this modern and high technology world which is also called the
“information era”. There is no doubt that people now want to own the
life that is safe and free and do the thing that they like and want to do.
And usually such kind of life is not so easy to own for some people and as
they are monitored by some device. If so the phone jammers can be your
good assistant.


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