Anti Theft Bypass
2009
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How do I use resistors?
Hello, I am trying to use resistors to get 15 different resistances. If I am correct, I could just go to radio shack and purchase resistors that I can link together to add up to these numbers?
To explain more clearly what I am doing, I am bypassing the anti theft system on my car, my car uses a key that holds a certain resistance, a module in the car measures the resistance and enables my car to start.
Since I no longer have the key, I have 15 different possibilities to choose from. I have never used resistors before but from what I believe, I can just purchase a few resistors that will add up to the correct numbers. Like say, to get 392, I will use one 330 ohm resistor, two 20 ohm resistors, one 10 ohm resistor and one 12 ohm resistor. would this work?
1=392 ohms
2=523
3=681
4=887
5=1130
6=1470
7=1870
8=2370
9=3010
10=3740
11=4750
12=6040
13=7500
14=9530
15=11800
These are the resistances I need to get
The answer is yes, as long as they are in series. R=R1+R2 only if they are connected one right after the other, which would mean that you would have to connect one end of the resistors to the others as well as the two terminals in the key slot which would be difficult. To connect them to some random metal and get the resistance follow this 1/Rtotal= 1/R1 + 1/R2. Make sure you add on the resistance of the metal connecting to the terming R=Lp/A where p is the resistivity and its in parallel as well. Also check the voltage and current ratings.
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