We have already seen some major components of our mobile robot. Of course you can use yours and everything else that you might already have from the previous projects. We can always add a camera module in our mobile and have eyes. Many similar projects add three distance sensors or an MPU 6050 that is actually an IMU. MPU6050 has three gyroscopes and three accelerometers. That provides us some more information. The following is an image of a MPU6050 sensor: