Diodes are essential in radios to turn rapidly oscillating radio waves into a smoother direct-current signal that can power a speaker.

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Kristi Hedges is a leadership coach, speaker and author of Power of Presence: Unlock Your Potential to Influence and Engage Others .

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Purists will appreciate that the original Incredible's red accents have returned, which are evident on the front speaker grille, the power button and camera pod.

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