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

Discuss How to make a key beeper that can be activated by a cell phone? in the Industrial Electricians' Talk area at ElectriciansForums.net

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xsustek

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 to activate it by a cell phone.

Any ideas?
 

Reply to How to make a key beeper that can be activated by a cell phone? in the Industrial Electricians' Talk area at ElectriciansForums.net

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