Sound Bot Alan Liou Undergraduate Student Computer Engineering

Contents Objective Special System Inspiration Initial Stages Development Design

Objective To create an obstacle avoiding robot that can differentiate 3 different frequencies and perform 3 unique movements by those frequencies.

Special System Utilize the Electret Microphone Brakout from Sparkfun and apply a digital filter on it Have one frequency designed for the robot to tack and hone using sound localization Have the other two frequencies make the robot perform custom movements

Inspiration First inspired by David Mercado’s robot, Trash2D2 Utilize sound localization Oliver Change’s Beethoven Bot Recognize various frequencies and draw its associated musical note

Initial Stages Create a higher sampling rate  Must be 2x higher than the highest target frequency, normal sampling rate is around 40 kHz Analyzing the signal  Apply a Fast Fourier Transformation to the sampling data

Development Try to implement FFT on samples on Arduino Due Utilizing the open libraries online to help create a fft code on Arduino such as the PlainFFT library on Arduino By mid November, I will decide whether I will continue implementing a digital filter or switch to an analog filter  If I switch to a an analog filter I would have multiple microphones each with their own op amp and custom band pass filter for selected frequencies.

Design Apply FFT on samples Process and send out commands

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