PupBot

Genevieve CarreOctober 31st, 2013

Content• Objective of Special Sensor• Inspiration• Summary of Approach– Microphone sensor– Bandpass filters– Development– Status Update

Objective• Send commands to robot• Receive Feedback– Robot Behavior depends on command• i.e.– Start – Spin– Stop

Inspiration• i-SODOG – Small robotdog – Japanese manufacturer Takara Tomy – Sales began spring of 2013 in Asia – Many preprogrammed entertainment movements– Understands 50 voice commands– Can learn new behaviors– http://www.robots.nu/i-sodog-small-robotdog-of-

tomy/

Summary of Approach• Microphone Sensor– Electret Microphone Amplifier - MAX4466• 20-20KHz• Ideal for audio-reactive projects

Summary of Approach

• Initial Stages– Angel Recorder

Summary of Approach• Bandpass Filters– Pass Frequencies within a certain range– Reject Frequencies outside that range– Necessary since each command is assigned to a

specific frequency range

Development• Filterpro– Guide for part values

• LTSPICE– Simulation analysis• FFT algorithm

– finds the frequency components of a signal (by converting to frequency domain)

Development

• LTSPICE schematic – BP filter with fc=400Hz

Development• LTSPICE simulation – BP filter with fc=400Hz

Development

• LTSPICE schematic – BP filter with fc=1kHz

Development• LTSPICE simulation – BP filter with fc=1kHz

Status Update

• Smartphone App to generate signal at constant frequency

• Filter signal picked up by microphone• Assign commands to frequencies read in by

MicroController– Preprogram actions based on commands

Status Update

• Debug Code provided as well:– At 400Hz, turn on LED (equivalent to start

command)– At 1000Hz, turn LED off, wait 1 sec, turn LED on,

wait 1 sec, turn LED off

AnyQuestions?

Thank you for listening!