Arc welding is a type of welding that uses a power supply to create an electric arch between an electrode (electric conductor) and a base material to melt the metals at the welding point. While you can certainly purchase a welder for your car shop or jewelry making business, you can actually save some money in that department by making your own.
Check out this video to learn how to make an arc welder using a car battery and quarters. Made of copper and covered with nickel, quarters make great electrical conductors.
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