How to make a key beeper that can be activated by a cell phone?


Old 01-17-11, 07:59 PM
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How to make a key beeper that can be activated by a cell phone?

Is there a device that that can be somehow activated by 'some' signal produces by today's cell phones (bluetooth, wifi, infra...) and then make a beep sound? Preferably it should be small, light, cheap, with low consumption of energy.

It should work as a beeper to find a thing that it is attached to more quickly. The thing is that is has to be activated by a mobile phone. Either by calling some number, or running some application etc.

Any ideas?
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Old 01-18-11, 05:10 AM
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I doubt anyone on the forum would answer such a question. If you're not in beeper range, you don't need to be activating it from a cell phone. Sounds a little too Middle East for me.
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