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Turn heat on with cellphone

Jkeno64

Nov 27, 2011
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Nov 27, 2011
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Hello i would like to turn on heat in an out building using a cellphone. I would like to have a pre-paid cellphone be able to call it and have it turn on the heat. What do i need to make this happen. Thank you
 

jackorocko

Apr 4, 2010
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Apr 4, 2010
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I guess you could do all that gsm, but all you really need is to trip a relay or some sort of switch to enable the heater. Do you need to turn it off with the cell phone?

I remember there was a thread on here where someone used the power to the speaker to drive a transistor that drove a relay. Just make sure your ringtone is a constant ring and it should drive a transistor, which you could add a latching circuit to if you didn't need turn it off with the phone.

I wish I could find it, but this search feature on this forum doesn't work worth a crap for me.
 
Last edited:

(*steve*)

¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd
Moderator
Jan 21, 2010
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For a one-off application, this looks like a possibility.

Something operated from the ringer sounds OK, until you get calls from telemarketers or your local politician, or just plain old wrong numbers...
 
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