Mobile Phone Dialer

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Hi,

I am attempting to put together a device for sending an alarm signal
to a remote location via
cheap mobile phone.

I need to wire up a mobile phone so that it will dial a number (one
number required only).
Since I have very little knowledge of mobile phone circuits I have no
idea where to start.

I cannot use a PC or anyother blue tooth/ir (or whatever) as the
device I am making
needs to be as small as possible.

Having no knowledge of the internal workings of phones I was thinking
along the lines
of simply opening the phone and attaching wires directly accross the
key pad "buttons"
(soldering internally accross the tracks on keyboard). Then I can
dial/operate the phone
by using a circuit that will place the required suquence of pulsed to
my attached wires
(just as if the buttons were being pressed as normal)

The device is for the purposed of attaching to an animal. When the
animal is distrubed
and runs this will trigger the phone to dial and alert someone of the
suituation. I will
have to figure out the circuit that will detect the animal running but
I think that will be done
using a mercury tilt switch (or its small solid state equivalant) and
a counter with a timer
to reset the counter every 10 seconds or so. Thus if switch switches
more than (say) 20
times in (say) 10 seconds then this means the animal is running and
phone shall phone home!

Now if only I can get some good Samaritan to lead me in the direction
of a device or way
to dial that phone................

The whole contraption needs to be small and low power.

Thanks for any help.

Cheers.

P.K.

 

[GregS]

Hi,

I am attempting to put together a device for sending an alarm signal
to a remote location via
cheap mobile phone.

I need to wire up a mobile phone so that it will dial a number (one
number required only).
Since I have very little knowledge of mobile phone circuits I have no
idea where to start.

I cannot use a PC or anyother blue tooth/ir (or whatever) as the
device I am making
needs to be as small as possible.

Having no knowledge of the internal workings of phones I was thinking
along the lines

Reminds me of a time several years ago, I did something like that with a calculator.
i was using it as a counter by adding one. We also used to use little boxes with
phone keypad and mic, so we could call out on 2 mtr. Ham radios. A memory would
key out the necessary tones. So I guess the worst case you might have is to
simple push the call button, then use a tone readout from a speaker phone.
I guess the Cell phone would also have a memory, so keying out the pad
with mechanical contacts would work, but it might hopefully be easier.

greg

 

[Macgyver]

Hi,

<snip>

How about an existing pet communication/tracking product

http://www.gizmag.com.au/go/6127/

What is the animal, and how far away will it be when it phones home.

I can see it now, laptop strapped to a poor cat. LOL

 

[Brendan Gillatt]

Hi,

I am attempting to put together a device for sending an alarm signal
to a remote location via
cheap mobile phone.

I need to wire up a mobile phone so that it will dial a number (one
number required only).
Since I have very little knowledge of mobile phone circuits I have no
idea where to start.

I cannot use a PC or anyother blue tooth/ir (or whatever) as the
device I am making
needs to be as small as possible.

Having no knowledge of the internal workings of phones I was thinking
along the lines
of simply opening the phone and attaching wires directly accross the
key pad "buttons"
(soldering internally accross the tracks on keyboard). Then I can
dial/operate the phone
by using a circuit that will place the required suquence of pulsed to
my attached wires
(just as if the buttons were being pressed as normal)

The device is for the purposed of attaching to an animal. When the
animal is distrubed
and runs this will trigger the phone to dial and alert someone of the
suituation. I will
have to figure out the circuit that will detect the animal running but
I think that will be done
using a mercury tilt switch (or its small solid state equivalant) and
a counter with a timer
to reset the counter every 10 seconds or so. Thus if switch switches
more than (say) 20
times in (say) 10 seconds then this means the animal is running and
phone shall phone home!

Now if only I can get some good Samaritan to lead me in the direction
of a device or way
to dial that phone................

The whole contraption needs to be small and low power.

Thanks for any help.

Cheers.

P.K.

Nokia do a bunch of cheap phones (check the 1*** range). Their
connection is via a super cheap rs232 cable.
Have a look at
http://pinouts.ru/CellularPhones-Nokia/nokia_1100_pinout.shtml
for a pinout.
I suggest using a PIC or similar small microprocessor for controlling it.