how to duplicate car alarm remote control

skyline2m

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Senior Member

skyline2m

Known Member
Senior Member
Jul 20, 2006
125
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1,518
Kota Kinabalu
both of dad n mum car use the same alarm system (same remote control)
i found 1 spare alarm remote control and tested for both of the car but is doesn't work
due to the serial no. writen on the circuit, it is the same for 1 of the car remote control of the bot car so i wana try to adjust so that it can be use for 1 of the car
can u teach me how 2 do?
(bettery had been changed into new battery but still cant be use)
 

dodoseek

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Senior Member

dodoseek

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Senior Member
Mar 11, 2006
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first of all i'm an engineer and this brief tutorial serves as tutorial purposes only and it should not be used for malicious activities.


you need 2 things to do this:

1)spectrum analyzer (this can be easilly found in your school or uni lab)
2)philips screwdriver (the tiny one)

its easy, u unscrew the cap of the alarm, and turn on your spectrum analyzer, most typical alarms operate on the 355khz range, just fine tune to the range and press the "on" button, if its in range, there will be a reading on the spectrum analyzer. Then open up the 2nd alarm u wanan clone, look at the circuit there will be an voltage controlled oscillator (its a knob where you can turn counter clockwise and clockwise), fine tune the oscillator to give the exact same reading as the first one, VOILA, you just cloned your alarm.