NXTG Workshop Day 2

1
NXTG Workshop Day 2

• Programming with
• Touch Sensor
• Light Sensor
• Ultrasonic Sensor
• Repeat
• CJ Chung
• Associate Professor of Computer Science
• Lawrence Technological University

2
Start-Touch

• Wait until the touch sensor is pressed
• Then start the robot to go forward
• Stop after a second

3
Start-Light

• Locate the robot in the middle of the ring
• Wait until the light sensor detects very bright
  (lantern) light
• Then start the robot to go forward
• Stop after a second

4
Start-Light
5
Stop-Touch

• Go straight until the bumper is hit
• then stop

6
Stop-Edge

• Go straight until the white edge of the ring
• Then stop

7
Ultrasonic Sensor Test
8
Loop

• To repeat a sequence of code
• Until
• Elapsed time
• Number of repetitions
• Sensor condition is met
• Logic becomes true
• Forever

9
Say Yes 10 times
10
Make the robot move around in the ring Basic
Sumo (Sumo0)

• Repeat the following forever
• Go forward until the edge
• Backward slightly
• Spin right

11
Sumo0
12
First Sumo Competition

• Some matches
• Ask students to list ideas to improve the Sumo
  robot

13
Repeat Until

• Spin a little bit until it detects an object less
  than 10 inches
• If detected, stop spinning and say Object

14
Mission Find a static object using the
ultrasonic sensor push it out of the ring,
but the robot should remain on the ring!!