Contemplate Automated Mining Robot

The robot knows which way to continue mining by using the ultrasonic sensor.
I use the switch block to decide which way to keep mine.
The robot will take two records of ultrasonic sensor comparing values of left and right.
The robot will decide which way to turn by comparing values.
I of course use the switch block to decide.
For example, when the value of right is higher than value of left, then the robot will turn left.
Then, when the value of left is higher than value of right, then the robot will turn right.
The value is measured by how far away the wall from the ultrasonic sensor is.

By this function, which measures the value of the distance, and deciding which way to go, the robot can decide which side to keep mining.
This technology is helpful to anywhere, which requires distance measurement and right or left decision making. Besides mining, it will helpful to complete maze (to find the free space).

In addition, besides ultrasonic sensor, other ultrasonic sensor is very helpful too.
For example, sound sensor will help to go to the place, where the sound is heard.
And the light sensor will helpful to go to light or dark place.