Quantity   Component name
2 × Arduino For the drive unit and the sensor unit.
1 × Voltage regulator
1 × Neodymium Magnets
1 × A spherical casing with a smooth outer surface.
2 × Ultra-Sonic ranging sensors
1 × Accelerometer ADXL335 To get the orientation of the sensors.
2 × 9V Batteries
2 × Switches
1 × Bluetooth No need conceptually but you want it to have manual control.
1 × Radio Trasmitter and Reciever.
2 × Motor with a 3- inch wheel.
1 × 12v Battery
1 × L298n motor driver.