Controlling a relay via cellular phone.....

Wed Jul 12, 2006 9:26 pm   

Hello,

Since a few weeks I am running a webcamserver . It is stationed 40
Kilometers away. I control it via an UltraVNC connection. However, about 2
times a week I need to hard-reset the computer manually.
I am looking for some kind of construction to reset the computer via a GSM
cellular phone.
The only thing I need is a relay that I can switch by making a call to the
GSM phone. So, I need only 1 channel.
This relay could switch the reset-button.

Can anyone help me out?

Thanks in advance.

Marcel

Wed Jul 12, 2006 9:59 pm   

EsDee wrote:


Why not use the printer port and just issue the right command to pull
the reset line low with a DIP or reed relay?


--
Service to my country? Been there, Done that, and I've got my DD214 to
prove it.
Member of DAV #85.

Michael A. Terrell
Central Florida

Wed Jul 12, 2006 10:30 pm   

On Wed, 12 Jul 2006 23:26:49 +0200, in sci.electronics.design "EsDee"
<bizzibee_at_xs4all.nl> wrote:



<paranoia>

****BANG****
FBI/CIA... what account was this?

Geneva,

OK no probs

</paranoia>

or just do a nice stir fry, lots of veg, hot oil and Wok. Beats
McDonalds anyday. And you dont fart as much


martin

Wed Jul 12, 2006 10:39 pm   

On Wed, 12 Jul 2006 23:26:49 +0200, "EsDee" <bizzibee_at_xs4all.nl>
wrote:


Vibrator motor drive?

John

Wed Jul 12, 2006 11:37 pm   

EsDee wrote:


For a second I thought you were a terrorist bomber !

Graham

Wed Jul 12, 2006 11:43 pm   

On Wed, 12 Jul 2006 23:26:49 +0200, "EsDee" <bizzibee_at_xs4all.nl>
wrote:


System admins use the below x10 telephone gizmo to remotely cycle
the power to hung servers to reboot them.

http://www.x10.com/products/x10_tr16a.htm

Thu Jul 13, 2006 12:34 am   

I think al Qaida has details on how to do this posted on their website.

--
Paul Hovnanian mailto:Paul_at_Hovnanian.com
------------------------------------------------------------------
Optimist: "The glass is half-full."
Pessimist: "The glass is half-empty."
Engineer: "The glass is twice as big as it needs to be."

Thu Jul 13, 2006 12:37 am   

EsDee wrote:

Ask yourself how many wrong numbers you get per week. Ask yourself
whether you really want your computer reset everytime someone misdials
the number of the pizza-parlor. Ask yourself whether you really want
everybody on the planet to be able to reset your computer at will.
Including everybody on usenet, once someone finds out the number you
assigned to this and posts it here.

I'm sorry, but no functional computer needs to be reset twice a week.
Hitting reset everytime your computer hangs is like buying a new car
everytime the old one runs out of gas. It is the desperate attempt to
avoid solving a problem.

If your computer hangs that often, then your setup is broken -- either
in hardware or in software. Fixing it will not only save you money in
the long run (no need to keep a GSM) but will probably teach you a
bunch of things. Some of which might even come in handy in the future.


cordially

Y.T.

--
Remove YourClothes before you email me.

Thu Jul 13, 2006 12:50 am   

ytyourclothes_at_p.zapto.org wrote:


You've never used Windows ?

Graham

Thu Jul 13, 2006 1:12 am   

On Thu, 13 Jul 2006 01:50:45 +0100, in message
<44B598E5.BE1F87CD_at_REMOVETHIS.hotmail.com>, Eeyore
<rabbitsfriendsandrelations_at_REMOVETHIS.hotmail.com> scribed:


Er, Graham, he said *functional.*

--

If life seems jolly rotten, there's something you've forgotten,
and that's to laugh and smile and dance and sing!

Thu Jul 13, 2006 7:15 am   

"Paul Hovnanian P.E." <paul_at_hovnanian.com> schrieb im Newsbeitrag
news:44B594FD.72369C8B_at_hovnanian.com...

Thu Jul 13, 2006 10:18 am   

On 2006-07-12, EsDee <bizzibee_at_xs4all.nl> wrote:

set the phone to vibrate when it gets a call from you
(if you set it to only do it on calls from you and to refusa other calls
that's probably best)

and then use a vibration detector to reboot the computer,
(or wire a small relay in place of the vibration motor)

the best part of this plan is that in many places unanswered calls are free!


vibration switch:

------+-------------------+----+--- +v.
| | |
/ relay |~/ |
1K \ coil |/| |
/ /_| |
\ | |
| +->|-'
+--->|-. 4K7 /
| | |/
vibration | +--/\/\/--|
contacts | | |\|
#|><| | ~\
| ===== |
| | 10uF |
| | |
--------+---+------------+-

the vibration sensor use two contacts one one fixed to the back of the phone
the other lightly touching and weighted (with a small weight (small coin
etc))

I've seen similar contacts used in pinball machines.

Bye.
Jasen

Thu Jul 13, 2006 10:25 am   

On 2006-07-13, Eeyore <rabbitsfriendsandrelations_at_REMOVETHIS.hotmail.com> wrote:

even windows 95 could runs 42 and a bit days before it locked up

Bye.
Jasen

Thu Jul 13, 2006 4:06 pm   

http://www.jaycarelectronics.com/ and search for 'SMS'.

four inputs and eight outputs so a shade overkill but at only £15 not a
problem.

Fri Jul 14, 2006 5:04 pm   

"Michael A. Terrell" <mike.terrell_at_earthlink.net> writes:


Instructions for using parallel port for controlling different things
can be found on the article I have published here
http://www.epanorama.net/circuits/parallel_output.html


--
Tomi Engdahl (http://www.iki.fi/then/)
Take a look at my electronics web links and documents at
http://www.epanorama.net/