Mbot Joysro -
By using both the IR receiver (standard) and the ultrasonic sensor (Joysro), you can program the robot to maintain a distance of 20cm from your hand. Move your hand forward, the robot rolls forward. This is crowd-control tech in a small package.
: Connect your mBot to your computer via a USB cable or Bluetooth. mbot joysro
How many times have we done that? Spun in place, hit a wall, and kept spinning? By using both the IR receiver (standard) and