1. The “Charlotte” Doll
Made by Obiageli W. Nwodoh and Vanessa M. Molano

2. How it works?
• Charlotte Doll receives audio signals
through four microphones
• Rotates towards the highest signal
• Method of tracking the speaker’s
position
• Speaks after moving to position
• Repeats cycle
Microphones
Motor
Raspberry Pi

3. Results
• Doll responds to Vanessa (right)
and Oby (left)

4. Problems and Future Improvements
• Problems
• Issue of detecting multiple voices
• Each microphone varies in sensitivity
• Adding distance between microphones
• Challenge of calculating steps
• Constantly depends on position
• Future plans
• Add more motor movements
• To limbs or head
• Add additional features
• LEDs to eyeballs
• Movement in two directions
Reverse
direction
Arm
movement
Head
movement