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Arduino Electronics Blueprints by Don Wilcher

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Adding an LED bar graph display for selected sound

Besides displaying the names of the sound files on a serial monitor, a lighting indicator can be used for positive visual feedback. The idea behind this new feature is to provide a unique visual effect for the random function. The random patterns generated within the software can be seen using solid state indicators like LEDs. The visual random patterns using LEDs will look best when viewed in a darkroom. The Proof of Concept (POC) that is being presented in this section is more of a design challenge to take the knowledge obtained from the previous hardware and software changes for building a unique and visually appealing device.

To help develop the LED bar graph display POC, a possible breadboard ...

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