Report the average of your three trial distances to your instructor or TA Trial

# Report the average of your three trial distances to

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Report the average of your three trial distances to your instructor or TA. Trial 1: ________ Trial 2: ________ Average: __________ Trial 3: ________ Why do you think your trials were different, and different from other teams? List all possible reasons for discrepancies. We’ll revisit this idea when we talk about “robust” designs later this Module. ____________________________________________________________________ ____________________________________________________________________ ____________________________________________________________________ ____________________________________________________________________ TASK 3: MAKING “DECISIONS” WITH SENSORS AND LOOPS Let’s return to the Touch Sensor. Its Boolean input cannot be directly input onto the NXT display the same way that the numerical-value inputs can. One convenient thing about Boolean values is that they can be used to break out of infinite loops. Let’s give those a try. Loops can be drawn in your Block Diagram by selecting NXT Robotics >> Programming >> Structures on the Functions Palette. (This is our first time using icons outside of NXT I/O!) Open a new VI (blank Block Diagram) and draw a While Loop in your Block Diagram. Drop a Motor icon into the While Loop and try to run the program. See Figure 4. What happens?
- 11 - Module 1, LC 3 Figure 7: Basic Display Program with Loop Having a constant attached to the Conditional Terminal is not very exciting. But we do have one other immediate source of Boolean data – the Touch sensor! Activity: Write a program to make your robot’s motors turn on, and then turn off when the Touch sensor is pressed.

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• Fall '14
• light sensor, Touch sensor, rotation sensor

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