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| [* black] The next components to install are the LEDs. Light emitting diodes are used in all sorts of electronics to provide bright, different colored lights. | |
| - | [* icon_note] Note that the two leads are different lengths. Since an LED is a diode, it only allows current to travel in one direction, so it is important to put the correct lead in the correct hole. |
| + | [* icon_note] Note that the two leads are different lengths. Since an LED is a diode, it only allows current to travel in one direction, so it is important to put the correct lead in the correct hole. |
| [* red] The four LEDs go in each of the four pairs of holes inside the circles titled LD1 through LD4. | |
| [* black] Line up the short lead with the hole next to the flat part of the circle drawn on the circuit board. |