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Solve : car plug polarity? |
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Answer» This is really random but does anyone know which part of those car plugs is positive and which is negative? Usually negative is on the side and positive is on the tip of You cant plug an AC prongs into the DC outlet... I'm trying to plug a car plug thing into a normal wall outlet, I have an ADAPTER that converts to 12 volts DC. I'm going to solder wires to the adapter and the car plug and I wasn't sure which is positive and which is negative on the car plug.i sense danger. if you really must do this, make sure you have another person by you at all times, ALSO, make sure you have a fire extinguisher at hand.Quote from: Soviet Genius on December 27, 2007, 09:33:50 PM
Beware. Depends are what you are intending to do with that 12V "DC" output from the adapter. To me, "adapter" implies a wall wart. One of those cubes about 2 inches square, that has two prongs on it so you can plug it into the wall. It usually has a length of two conductor wire, with some sort of plug on the end. These things are designed to supply power to a matching device. Usually these devices are not too picky about the quality of the "DC" supplied to them. These wall warts are not full fledged power supplies. One of the measures of the quality of a power supply is its ability to provide smooth, stable DC while under load. Wall warts often supply a rough form of DC. Not smooth. Perfectly smooth is what you get from a 12V car battery. That is what is causing me to feel that you need to use caution. WHATEVER you are intending to power with that "car plug" is most likely going to want a nice, stable, smooth source of DC. When I say to use caution - what I'm really saying is that if you do not have prior experience with the set-up and equipment that indicates that it will all work fine, then I wouldn't connect anything expensive to that source of 12V. That way, if it dies, you are not out much. What are you trying to power? And how much current does it need? Perhaps we can direct you to a BETTER power supply. Yes, be very careful..... If you accidentally send A/C power into a D/C device or vice versa, you can destroy the device. Believe me, I've done it. And don't mix A/C with D/C... it doesn't work. oh, and check out wikipedia and google. It works, and I don't think it's very sensitive to unstable power, it's just a battery charger. Not regular batteries, a specific kind. |
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