Team 8 worked through the final period of the class to create an Arduino based audio visualizer. The goal was to make a device that accepted sound via the spark fun sound detector microphone and signaled the Arduino Uno to change the LED depending on the volume of the music. It started with testing out our code just on the LEDs and board with building a wooden structure to hold the hardware after. This resulted in an upside-down T shaped structure that has a multicolor display that pulses. The circuit shown above required a 330-ohm resistor and a 100 microfarad capacitor. The capacitor was used to smooth out the power running into the led strip as fluctuations could cause adverse effects in the lighting, and the resistor was used as a ballast, or current limiting, resistor.
The general design of the box was inspired by a soundbar type device that could be placed in any general living room. As shown from the AutoCAD sketch above the main housing unit was designed to be a 5 x 5-inch box. This allowed for the Arduino and a small breadboard to be housed within this member. This also allowed for cutouts to be created to push two arm members through. This cutout was to act a strengthing arm as well as holding the arm in place. once these arms and main box units were laser cut 4 strips of 9 LEDs were cut and glued to the members. The microphone was then attached and glued to the hole cut out in the front of the box. Electrical tape was used to insulate the microphone from outside vibrations.