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04-30-2005, 05:32 PM | #1 |
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Location: Allentown, PA
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Airbag fix with 3 10 ohm resistors
Got a quick question did a little research earlier and it looks like I need 3.0-3.3 ohm resistor to fix my airbag light.
Well the local radio shack doesnt carry those so another route I have heard of is to use 3 10 ohm resistors in parallel. Couple questions in regards to this. ISnt 3 10 ohm resistors greater than just one 3.0-3.3 ohm resistor? And secondly when people say in parallel are they just talking about put 3 of teh resistors in the connector one at a time or do I have to connect the somehow?(ie. soldering) Thanks
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04-30-2005, 09:59 PM | #2 |
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"In series" and "in parallel" are common basic electricity wiring terms. When you have 2 components, you put them "in series" by connecting one to the next, so electricity flows through the first, then through the second. Putting 2 components "in parallel" means connecting the input end of one component with the input end of the 2nd, and the output end of one component with the output end of the 2nd, so electrons coming into the setup each have a choice of going through one component OR the other, but not both.
For resistors, when they are in series, you just add up the resistances to get the resistance of the setup. Rtotal = R1 + R2. When they are in parallel, you have to calculate; 1/Rtotal = 1/R1 + 1/R2. So for 3 10ohm resistors, 1/Rtotal = 1/10 + 1/10 + 1/10; 1/Rtotal = 3/10, so Rtotal = 10/3. [Edit: link to diagram] http://www.physics.uoguelph.ca/tutor....parallel.html Last edited by armand1; 05-01-2005 at 02:47 AM. |
05-01-2005, 12:19 AM | #3 |
Trust no one
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Connect the 3 10-ohm resistors across each other, this is a parallel connection that will give you 3.3 ohms.
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05-01-2005, 11:58 AM | #4 |
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Makes sense now, can I just twist all three end together and install it like that?
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05-01-2005, 12:18 PM | #5 |
Trust no one
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You shouldn't just twist them together. Solder and seal the connections, preferably with heat shrink. The entire resistor "assembly" can be covered in heat shrink to seal it up.
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