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Basic DC electricity question
I'm trying to help my daughter with a school project and while I know my way
around house wiring, I'm a relative newbie when it comes to low voltage. Let's say I have a 6 volt DC power supply (4 "C" batteries). If I want to drive a small motor and some lights, I just find 6 volt motors and lights and wire them in parallel or series. Why is it that I can't light up a 12v light with a 6 volt power supply? I always test my batteries using a multi-meter and as the battery ages, the voltage drops. With low voltage, the device (flashlight, etc.) still works but the light is weak. So, wouldn't a 12v light just be weak if I use a 6v power supply? Is there some kind of voltage threshold at which a device won't work? Like I said, basic question. |
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