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Old 11-08-2008, 10:58 AM   #1
randomwalk101
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electrical surge

Hi guys,

I'm trying to put some LEDs on the bike...I know the system normal voltage is 12v. However, can the bike electrical system spike HIGHER voltage than 12 volts (like revving the engine)? If so, what is the max? I need to know to calculate the proper resistor for the LEDs. I don't want to base on 12 volts and if the voltage spikes up killing the LEDs...but on the other hand, I don't want to use too big of a resistor making the LEDs dim (underpowered). Thanks for your advice.
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Old 11-08-2008, 11:02 AM   #2
level5
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the voltage regulator can output up to 14.5 volts on normal operation.
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Old 11-08-2008, 05:29 PM   #3
MykolJ
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how many resistors? are they in parallel or series?
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Old 11-08-2008, 06:55 PM   #4
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Quote:
Originally Posted by MykolJ View Post
how many resistors? are they in parallel or series?

Why?

Parallel or series? If overpowered will blow either one. Parallel/Series simply a circuitry design.
How many resistors? They key here is to determine the proper size (ohm), not quantity of resistor. One big resistor can be made equals to tons of smaller ones.
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Old 11-08-2008, 07:02 PM   #5
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it isnt volts u have to worry about

check the amperage output of ur alternator, then use ohms law...pretty easy
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Old 11-09-2008, 01:45 PM   #6
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Quote:
Originally Posted by chase View Post
it isnt volts u have to worry about

check the amperage output of ur alternator, then use ohms law...pretty easy

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