EEVblog Electronics Community Forum
Electronics => Beginners => Topic started by: mucek on September 02, 2014, 07:51:45 am
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http://www.ecat.si/2014/08/gsm-door-opener-nokia-gsm-mod/ (http://www.ecat.si/2014/08/gsm-door-opener-nokia-gsm-mod/)
Simple project for re-use some old GSM phones into something useful ... :)
It's as simple as can be, though if you have any questions, you are welcome!
Regards,
Gregor
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Sounds like a nice idea. I'm assuming the phone provider lets it be 'receive only' if you don't bother paying for any credit/contract/etc? Otherwise it might end up being more expensive than you think.
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True, we have possibility (with one operator only!) for a 1 EUR/year contract. Others and prepaid options are far more expensive ... :(
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1 euro per year sounds very nice. Hopefully nothing more complicated will crop up.
Next challenge: make a receiver tuned to the EM patterns of your engine's firing sequence during idle.
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Funny, I did the opposite with an old Motorola phone to make a cheap cellular alarm monitor. Simply used the phone with the car charger and no battery, powered from 12V, and a simple one shot to press the call button when the siren went off. Put a small amount of PAYG money in the phone and left it at that. It never was used other than in test, but worked each time.
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Good to see this circuit being used for good and not evil.
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Good to see this circuit being used for good and not evil.
Enough said.