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  1. #1
    New Member faramog's Avatar
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    Alternator regulation

    The unloaded output voltage of my alternator varies from circa 20V to 60 odd (at more than 5000rpm). I can easility know up a circuit to regulate it to 12V, but on the offchance anyone knows any good cheap boxes (to sit in the cockpit) that will do this ?

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  2. #2
    Founding Member - See my blog entries for help using the forums VinceG's Avatar
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    Can you not get a car one from a scrap vehicle that has an external regulator?
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  3. #3
    Captain Bill Scott's Avatar
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    I'd pop around to my local friendly independent auto electrician and ask him what meets the spec
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  4. #4
    Co-Pilot Jon S's Avatar
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    Measuring the output unloaded, doesn't mean a lot - especially if you're using a digital meter.
    Put a load of some sort on to the output and measure it again.
    If you haven't got any suitable resistance - a light bulb will do at a push.
    I'm assuming you're talking about the lighting supply windings on a Rotax or similar - rather than a automotive alternator, which will usually need a 12V field supply to energise it and will have some form of regulator either internally or as a control box connected to it.


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