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===Breadboards are the best===

We’ll be using three components (a 9V battery, an LED, and a resistor), plus a very special piece of equipment: the breadboard. The '''breadboard''' is an incredibly handy tool used to rapidly assemble and modify a circuit; to '''prototype''' without the need to solder. A series of isolated metal rails are mounted inside a plastic housing, which can be accessed through holes on the breadboard's front face. The rails themselves allow you to electrically connect components, and the holes in the plastic housing hold the components in place. Take a look at the top face and the internal connections: