Our first goal was to make the robot appear like R2D2 with his mouvements and the way he comes close to Luke or Anakin. We started thinking about a emetter like a beacon that the robot will follow. So we thought about an ultrasound emitter.

The ultrasound part was long and we didnt know really were to start. We found one other project with the same idea with an arduino but it was an ultrasound emitter and receiver made specially for it. We found out that to make two ultrasound sensor aware of each other they need to be synchronized, so we put this idea aside and move on.