Saturday, November 1, 2008

The urban legend - Remote Keyless Entry System - The Real Experiment

I believe that every1 of us received this email b4....

"Subject: Have you locked your keys in the car? Does you car have remote keys?

This may come in handy someday. Good reason to own a cell phone: 

If you lock your keys in the car and the spare keys are at home, call Someone at home on their cell phone from your cell phone. Hold your cell phone about a foot from your car door and have the person at your home press the unlock button, holding it near the mobile phone on their end. Your car will unlock. 

Saves someone from having to drive your keys to you. Distance is no object. You could be hundreds of miles away, and if you can reach someone who has the other "remote" for your car, you can unlock the doors (or the trunk)."

Date: 30/10/08 (Thu)
Time: 10.43pm
Place: outside IIUC campus

den we decide to try it out....

The 'someone from home' - CSC @ the driver
The one who 'locked his key in the car' - CH @ Co-driver A
Video: TY @ Co-driver B

so the status of the urban legend: FALSE !

a short clarification from :
NO. Cell phones use digital signals to transmit voice. Under the best situation audio signals are 10 HZ to 20000 HZ. A cell phone only transmits a portion of this. A Car Remote operates in the Megahertz range. The microphone in a cell phone can't "Hear" those frequencys, the transmitter can't sent those frequencys, and the tiny speaker could never reproduce them if it could get there. Not to mention it is not audio signals but electromagnetic signals that are used for the car remote.

More info at:

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