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Wait Time Command TESTING

How accurate is the Wait Time Command Design a simple experiment to gain a better understanding of how the Wait Time command works and how accurate it is.

Hypothesis: The Wait Time Command is an accurate way to control the amount of time an action will occur.

1 Does the create wait between different LED colors?

Experiment:

The amount of time a LED holds a color before switching and whether or not there is a pause between colors.

Set Up:

- Get stop watch ready

- Enter 128 131 then 152 10 139 0 255 250 155 50 139 10 0 250 then 153, and time the how long before the color change (it should be 5 seconds) Do multiple tests to compensate for human error.

Results: I calibrated my reaction time (a source of error) as 00:00:29 and then performed the experiment 3 times, getting the same result of 00:05:29 each time. Once my reaction time is subtracted the robot is shown to be hgihly accurate: getting 5 seconds, as commanded each time.

2 Does the create drive for the same amount of time as the wait command?

Velocity X Time = Distance

Experiment:

If the robot drives 250 mm/s for 10 seconds and it should have gone 2,500mm or 250cm.

Set Up:

- Set up 2 tape lines 250cm apart.

- Place create with front bumper exactly aligned with the 1st tape line.

- Enter this: 128 131 then 152 12 145 0 250 0 250 155 100 145 0 0 0 0 then 153

- Measure how far the front bumper is from the 2nd tape line

Results: The robot went 245 cm, instead of 250cm as I predicted. The difference is most likely the result of acceleration, not an error of the timer itself.

3 How does the create dictate different commands? Do different opcodes affect how the wait time command is processed.