Hi All


Does the external generator lamp illuminate when operating?

Or does it light up when there is an abnormality in the over-voltage, low-voltage lamp?


Thank you in advance

  • Re: External alternator Lamp

    by » one year ago

    The lamp only illuminates when the Generator output is very low.

    It is about as simple of an indication as you can get.  (1920s Technology)
    One side of the bulb connects to the battery.
    The other side connects to the Generator output.
    If the Generator is near zero volts, there is near 12v across the lamp. It illuminates.
    If the Generator is making 12 volts, there will be 12v on both sides of the Lamp; Zero ACROSS the lamp. It will be Dark.
    The whole circuit is a Lamp and a diode. It is about as simple as you can make it.
    It may very well be the first Idiot Light invented.

    Bill Hertzel
    Rotax 912is
    North Ridgeville, OH, USA
    Clicking the "Thank You" is Always Appreciated by Everyone.

    Thank you said by: Tom lee

  • Re: External alternator Lamp

    by » 4 months ago

    I really appreciate your response

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