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12v relay connected to cell phone

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Copper - Posts: 68
Copper spacespace
Joined: April 04, 2002
Location: United States
Posted: September 06, 2004 at 11:06 AM / IP Logged  
Not to change the subject but you guys can make this work I was wondering is there away to take the same concept but change it a little bit, like make a alarm when set off make a call(from a pre-paid cellphone) to my cell, almost like a infinite range paging alarm...
Copper - Posts: 76
Copper spacespace
Joined: March 16, 2004
Location: United States
Posted: September 15, 2004 at 7:45 PM / IP Logged  
wifi if you have not got something together for this yet shoot me an email. What you want to do sounds fairly easy.  If you can live without the timer setup and want something real easy that you could hook up without any experience in electronics it can be done. If you are stuck on having the timers and dont feel confortable building one, with a diagram and a friend that can build it =) we can get you going.
Member - Posts: 11
Member spacespace
Joined: August 19, 2004
Location: United States
Posted: September 15, 2004 at 11:01 PM / IP Logged  

Thanks for the offer.  I found this

This is enough to get me going.  We already bought, assembled it, and tested it.  It works almost as what I originally wanted, for now, it's more than good enough.  I will investigate it some more.  The apogeekit does not solve the false alarm issue, and that is something I really want.  I do want to thank you.

Take care

Member - Posts: 1
Member spacespace
Joined: November 13, 2004
Location: United States
Posted: November 13, 2004 at 3:50 AM / IP Logged  

Set the phone up to be on SILENT mode (no ring, no voltage) to all callers except your number. Your number make the phone ring (+volts) and therefore trip the relay.

Relay would be normally closed and when switched (ring ring)  is +volts -- it would kill power to your loads - therefore rebooting.

Just a thought...

Copper - Posts: 199
Copper spacespace
Joined: November 15, 2004
Location: United States
Posted: November 16, 2004 at 6:10 PM / IP Logged  
I think you are going about this the wrong way.
Purchase a control box which hooks up to the rs232 port on the server computer. These are common and can be purchased for under $100.
Set up a server side script for a delay of whatever amount of time. Next thing is for the script to check for connectivity. If the test is OK then go back to start a new delay time. If it fails have it send a signal to the RS232 box to open the relay for whatever amount of time, then a delay for the radio to reset, and finally restart the script
Typical Controller
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