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1. True / False: Greyscale mode tells the color sensor to look for a specific color instead of the reflectivity of a surface.

2. True / False: Integer is an example of a data type for a variable.

3. Which of the following in not an example of a number that can be stored as an integer variable?

4. True / False: A single equal sign (=) is used in ROBOTC to assign one value to another.

5. In the "Store Distance" program, the value 493 was assigned to the variable encoderLine 1.
What does the number 493 represent?

Try it! 1

Try commenting out the "resetMotorEncoder" command that is right under the Task Main

Save the program as "StoreDistance v2" and download and run the program several times in a row.

With each run of the program, examine the value of the encoderLine1 variable in the ROBOTC Debugger Window.

Try it!

What Happens?

The motor encoders do not reset between runs so the value that is being stored in the variable encoderLine1 is incorrect.

The variable is now storing the value of all the cumulative runs of the robot because the motor encoder is not being reset.

Try it! 2

Create a program that has the robot run backwards until it reaches a certain encoder value.

Remember to use the resetMotorEncoder command, turn the motors on with the setMotorSpeed commands, and use a waitUntil command to set the condition of the motor's encoder value.

How is the condition in the waitUntil command different than what it would be if the robot was moving forward?

Try it!

What Happens?

Since the robot is moving backwards for a certain amount of encoder counts, we have to use getMotorEncoder in the waitUntil command.

Program the robot to pick up blocks that are placed at random distances away from the starting point.

Encoder values should then be utilized to travel the correct distance back to the starting point.

Once back to the starting point, the block can be cleared off of the challenge board.

Recreate the table below on any surface, then use objects that serves as the blocks.

Mini Challenge PDF[ Loading Dock EV3 Challenge.pdf ]