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FOLLOWING THE CIRCUMFERENCE OF A CIRCLE - EXERCISE 2

V.Ryan © 2005
 
Using Pilot 4 as a starting point, write a programme that makes the buggy motor round the inside edge of a black circle.
 
Hint:
1. Place the RCX buggy at the edge of the circle.
2. Programme it to move forward until the dark sensor detects the light level has fallen below 48, until it meets the circumference of the circle.
3. Turn the buggy away from the edge of the dark circumference line (turn the right motor on for a short time).
4. Loop the programme.

 

1. Programme the buggy to move around the inside edge of the circle. You may find it necessary to move the buggy forward slowly until it detects the dark circle and stop the motors.
 
HINT:
Programme the buggy with a zig-zag pattern of movement so that the dark outer line is detected by the sensor. Loop the programme so that the buggy continues moving until ‘turned off’.
2. Place the buggy in the centre of the circle. Programme a different pattern of movement. Perhaps the buggy could be programmed to push over cans arranged on the edge of the circle?
When attempting more difficult exercises with the buggy, it may be a good idea to draw each stage of movement on a piece of paper. In this start by drawing a circle.
 

 

 

 
 
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