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This barrel jack (female) will come in very handy if you want to connect DC power to bascially anthing! There is a 2.1mm DC jack on one end, and a screw terminal block on the other, so you can hook it up to anything you want, motors, breadboards, circuits, etc. The terminals are labeled with positive/negative assuming a positive-tip configuration (which is the most common), all you need to do is screw in some Equipment Wire and you can hook it up to anything you want!
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