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Transmitter/receiver pair serves as antitheft alarm

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Microchip
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re: Transmitter/receiver pair serves as antitheft alarm
Microchip   3/21/2012 11:38:47 AM
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Better still reverse the roles as streetrodder suggests and have the reciver energise a rtelay to disconect the fuel pump or ignition as it goes out of range... The the car won't be far away. Beter stil a TX/RX fucntion at both ends then you'll know its gone and can retrieve it.

Luis Sanchez
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re: Transmitter/receiver pair serves as antitheft alarm
Luis Sanchez   3/14/2012 5:39:19 AM
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This is very similar to the Proximity Profile in Bluetooth Low Energy. I suppose a Bluetooth based solution would be a little more expensive than the one presented here, but I wonder how much? Perhaps the difference isn't too big and the added functionality of an MCU, might make the extra cost worth it.

Streetrodder
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re: Transmitter/receiver pair serves as antitheft alarm
Streetrodder   3/13/2012 1:02:44 PM
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An interesting concept I propose this would be more effective if the systems were installed opposite from the model in the article. Interface the receiver with the car horn. This way when the vehicle is stolen, it would start honking when the signal was weak enough. The last thing a car thief wants is to draw attention. Also, it would help you locate the vehicle when they abandon it.

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