Team Members¶

Section A - Joo Won Lee

Section B - Shlok Patel

Description¶

An RGB LED Music visualizer that analyzes WAV files stored on a microSD card or takes audio input from the MEMS microphone, and displays the volume levels onto 5 RGB LED strips arranged in a 8x5 grid. Additionally, playback of the WAV files can be manipulated with controller inputs sent from a smartphone connected with the Adafruit Bluefruit Connect app.

Presentation¶

Link to presentation slides - Download for voiceover

Schematic¶

Parts Needed¶

• One Mbed LPC1768

• Five 8-LED WS2812b WRGB LED Strips

• Sparkfun MicroSD Breakout Board

• Adafruit SPW 2430 MEMS Microphone

• Adafruit Bluefruit LE UART Friend

• Sparkfun TPA2005D1 Class D Audio Amp

• PCB Mount Speaker

• DC Barrel Jack

• 5V/2A AC to DC Power Adapter

• 330Ω Resistor (Orange - Orange - Brown - Gold)

• Smartphone with Adafruit Bluefruit Connect App

• (Optional) 10k Potentiometer

Wiring¶

WS2812b WRGB LED Strips¶

These LED Strips are chained together, with the output end of one strip connected to the input side of the next strip. Additionally, a 330Ω Resistor is placed in series between mbed p21 and LED strip DIN to prevent any issues from voltage spikes.

MicroSD Breakout¶

MEMS Microphone¶

Adafruit BLE Friend¶

Class D Audio Amp + Speaker¶

Demo Setup¶

Demo Video¶

Code¶

Click here or navigate to the code tab at the top of the page