The “Charlotte” DollMade by Obiageli W. Nwodoh and Vanessa M. Molano

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

Results• Doll responds to Vanessa (right)

and Oby (left)

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