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=Team Name:= Oxianites =Team Symbol:= =I. Team Members Names (First Only)= Cannon, Connor, and David

=II. Instructions for Challenges=

A. For each challenge you must write a short description of the challenge using complete sentences. Please write in 3rd person, scientific writing. B. This is where you should include your programming code by including screen screen shots. You should place all multimedia on [|photobucke] t.com and then incorporate it into the site using the embed code. C. For each challenge you must provide some form of multimedia exhibit. This would be images, a short video, an interview, etc. You should place all multimedia on [|photobucket.com] and then incorporate it into the site using the embed code. D. For each challenge you should provide a written explanation of the difficulties encountered with the challenge. = = = = =III. Challenges (Template)=

Copy this section for each of your challenges:

DATE: 4/?/2008
Title of Challenge: A. Description (Short Paragraph): B. Programming Code (Picture and Written Explanation): C. Multimedia: D. Difficulties Encountered/How You SOLVED the Challenge! (Paragraph):

1. DATE: 4/7/2008
Title of Challenge: **Point Turn** A. Description (Short Paragraph): **Point turn is when one gets the robot to travel 25 cm forward and then turn around left in a "point turn" for a half circle turn (180 degrees). It then backs up 10 cm.** B. Programming Code (Picture and Written Explanation): **The code tells the robot to go forward almost 3.75 rotations and take a180 degree turn and then back about 1.5 rotations.** Picture 1. Point Turn Code C. Multimedia: media type="custom" key="653439" Video 1. Point Turn Video D. Difficulties Encountered/How You SOLVED the Challenge! (Paragraph): **The difficulties that one would encounter are finding out the exact number of rotations for the robot to travel a perfect 25 cm forward. However, once the person had the number of rotations for that, all someone would have to do was divide the number of rotations by 2.5 because of the ratio 2.5cm:1cm. It makes a perfect 25 cm going forward and a perfect 180 degree turn, following a 10 cm travel backwards.**

2. DATE: 4/8/2008
 Picture 2. Square Program Code **This is the code used to make the robot go in a square. The first green block is telling the robot to move forward a certain length. The next one is then telling only one wheel to turn it at the exact degree. The orange blocks and arrows are loops so it goes all the way around 4 times.** media type="custom" key="653447"** Video 2.Robot performing square
 * Title of Challenge:** Square
 * A. Description (Short Paragraph):** **The square challenge is a challenge where you have to make the robot follow a square that is drawn on the ground. The sides of the square are 61 inches and the angles are 90 degrees.**
 * B. Programming Code (Picture and Written Explanation):**
 * C. Multimedia:
 * D. Difficulties Encountered/How You SOLVED the Challenge! (Paragraph):**
 * Difficulties encountered when working on this challenge were ones like making it so the robot made it so it got all the way to the end of each side before turning. Also, it was difficult making the turn just right so that it would follow the line the exact same way as the first time. The problem that needed that the group needed to troubleshoot the most was the turn to make sure it got right on 90 degrees.**

3. DATE: 4/18/2008
Title of Challenge: **Back-up Turn** A. Description (Short Paragraph): **The gradual turn challenge was a challenge in which you were to make your robot make a slow turn then back up. You must make one wheel spin faster than the other while still having the other wheel work as well. Then you must have it back up for a certain length by switching the arrow on the programming thing.** B. Programming Code (Picture and Written Explanation): media type="custom" key="685511" Picture 3. Back-up Turn Program Code C. Multimedia: media type="custom" key="679739" Video 3. Back-up Turn Video D. Difficulties Encountered/How You SOLVED the Challenge! (Paragraph): **Difficulties we encountered were ones such as getting each wheel to work cooperatively to make the right turn without going too far our too short. If we made one wheel go just a little to fast it would make the turn sharper and vice versa. Another difficulty was getting the robot after making the turn, to back up just the right amount without going forever or stopping right after it. We solved these problems with guess and check methods and continuous test runs. We were definitely not able to do it on our first, second, or even third time**

4. DATE: 4/14/2008
Title of Challenge: **Creation Challenge** A. Description (Short Paragraph): **In this challenge, the robot was made to follow a course that the group made. The course needed to include 3 turns and it must use the sound sensor and the light sensor.** **The group's** **course included four turns and one gradual turn. The robot was told to start once it heard and sound. Once the robot passed over the black finish line, it was told to stop once it recognizes that black line.** B. Programming Code (Picture and Written Explanation): media type="custom" key="669475" Picture 4. Obstacle Course Program Code C. Multimedia: media type="custom" key="669383" Video 4. Obstacle Course Video D. Difficulties Encountered/How You SOLVED the Challenge! (Paragraph):
 * The programming code for this challenge is very confusing. The first block is the command for the robot to start once it hears a noise. The next nine commands are moving and turning commands.** **The third move block is the move command for the gradual turn. The last of the nine move blocks is the move block that tells the robot to go infinite rotations until it senses the black line in which it must stop on. The block that tells it to stop is directly after that.**
 * Some problems that were encountered during the creation of the commands include perfecting the gradual turn, building extensions for the light sensor, and adjusting the variables so the light sensor can detect the sharpie drawn onto the tape. To perfect the gradual turn, the only way for one to test is using trial and error. For one to build extensions for the light sensor, one would need to just add on crudely to an arm to get the light sensor to the ground without touching. Like the first difficult, for one to solve the variable problem on the light sensor the only solution is to use trial and error.**

5. DATE: 5/20/2008
Task 1 (10 points): At your work area on the table come up with a strategy to calculate the velocity of your robot at 30% power over 70 cm. Repeat the measurement 3 times and get an average. Think about the equation for velocity. Carry out your plan and determine the velocity.

a. Brief description and image (snip and you can upload to the wiki- give your image an uncommon file name) of the programming you used to solve this challenge. b. Description of what made this task difficult for your group. What made this difficult was timing it and getting to do it at exactly 70 cm. It was also difficult to start and stop the stopwatch at exactly the start time and the end time of the robot. Once we calculated that the average time it took for the robot to reach 70 cm at 30% power it took 8.37 seconds. Once we got that, we divided 70 by 8.37 which gave us the amount of cm/s. We found out that the robot moved at 8.4 cm per second at 30% power.

Task 2 (20 points):: At your work area, come up with a strategy to get your robot to accelerate over a 1 meter distance. Have it come to a stop at 1 meter.

a. Brief description and image (snip and you can upload to the wiki- give your image an uncommon file name) of the programming you used to solve this challenge. b. Description of what made this task difficult for your group.

Task 3 (30 points):: Determine the velocity of the rotation of the wheels on your robot. Program your robot at 45% power to rotate 10 times. Calculate the velocity of the rotation of the wheels at this power in cm/sec. (Hint: You need to know the circumference of a wheel and remember it goes around ten times!)

a. Brief description and image (snip and you can upload to the wiki- give your image an uncommon file name) of the programming you used to solve this challenge. b. Description of what made this task difficult for your group.

Task 4 (40 points):: On a graph, plot the velocity that your robot travels 1 meter at 20% power, 40% power, and 70% power. Include an image of your plot in your documentation by snipping it. Make sure it has units and axis labels. Using your graph, determine how fast you think your robot wold be traveling if you programmed it to go at 60% power. Calculate velocity in cm/sec. a. Brief description and image (snip and you can upload to the wiki- give your image an uncommon file name) of the graph. b. Description of what made this task difficult for your group.

Task 5 (50 points):: Create an obstacle course on your lab table with building bocks. It should contain one right point turn and 1 left point turn. The robot should stop at the end where you have built a small tower of blocks. Your robot should not knock the blocks over.