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Modifiche al passo #20

Modifica in base a David Hodson-

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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 putinstall the correct lead in the correct hole.
[* red] The four LEDs gobelong in each of the four pairs of holes inside the circles titledterminals marked LD1 through LD4.
[* black] Line upWhen installing the short lead withLEDs, insert the shorter of the two leads into the hole next to the flat part of the circle drawn on the circuit boardprinted circle.
[* 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 putinstall the correct lead in the correct hole.
[* red] The four LEDs gobelong in each of the four pairs of holes inside the circles titledterminals marked LD1 through LD4.
[* black] Line upWhen installing the short lead withLEDs, insert the shorter of the two leads into the hole next to the flat part of the circle drawn on the circuit boardprinted circle.