a guide to using roamer
DESCRIPTION
A Guide To Using Roamer. Menu. Clear Roamers ‘Go’ Memory Change Step Size Forwards Backwards Turning Right Turning Left Putting it all together Clearing The Last Entry Explaining ‘Repeat’ Repeat Instructions Shapes Making Music. 1. Clear the Roamers ‘Go’ Memory. - PowerPoint PPT PresentationTRANSCRIPT
A Guide ToUsing Roamer
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Menu1. Clear Roamers ‘Go’ Memory2. Change Step Size3. Forwards4. Backwards5. Turning Right6. Turning Left7. Putting it all together8. Clearing The Last Entry9. Explaining ‘Repeat’10. Repeat Instructions11. Shapes12. Making Music
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1. Clear the Roamers ‘Go’ Memory
To clear the Roamer's memory press CM CM.The first time CM is pressed a warning is sounded. If it
has been pressed by mistake, press another key or wait 10 seconds and the first press will be ignored.
CM CM
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2. Change Step Size
Roamer’s standard step size is the length of its own body i.e. 30cm.
To change the steps that the roamer takes press
This will change each step to 15cm. Change the yellow numbers to change the step sizes.
1 5 [ ][ ] GO
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3. Forwards
The roamer moves forwards in roamer sized steps of 30cm.
To move forwards 30cm press
To move forwards 60cm, 90cm etc. Change the to , etc.
1 GO
12 3
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4. Backwards
The roamer moves backwards in roamer sized steps of 30cm.
To move backwards 30cm press
To move backwards 60cm, 90cm etc. Change the to , etc.
1 GO
12 3
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5. Turning Right
To tell roamer to turn, he needs to know the number of degrees.
Roamer will need a set of instructions like this:
The 9 and 0 stand for 90o and should be changed to fit the turn you want.
9 GO0
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6. Turning Left
To tell roamer to turn, he needs to know the number of degrees.
Roamer will need a set of instructions like this:
The 9 and 0 stand for 90o and should be changed to fit the turn you want.
9 GO0
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7. Putting It All TogetherThe instructions you have learnt so far can be added together into a sequence.
Press at the end.
Remember to clear the memory before you start.
is the same as saying go forward 10 spaces. Roamer will move forward 6 spaces and then move forward again 4 spaces. 6 + 4 =
10
CM CM 6 4 GO
GO
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Putting It All Together
CM CM
5 9 0 1
GO
Roamer will move forward 5 spaces then right turn 90o and then move forward 1 space
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8. Clearing The Last Entry
If you make a mistake, then
cancels the last entry
CE
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9. Explaining Repeat
When you know how to write a sequence of instructions the next stage is getting some
instructions to repeat. Repeat means to do the same thing again a set
number of times.
Look at the example on the next slide.
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Repeat• To make this pattern, roamer needs to go -
forward 1 space turn 90o to the left forward 1 space turn 90o to the right forward 1 space turn 90o to the left forward 1 space turn 90o to the right
The instructions are repeated 2 times.
If the pattern continued then you can see it
would repeat the same instructions again and
again.
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10. Repeating InstructionsCMCM
2R[]
19 019 0
[] GO
Clear Go Memory
Repeat No. Of Repeats
Open Brackets
Instructions
Close Brackets Go
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11. Shapes
Use the repeat command to make shapes Click on the shape to find out more
Back to ‘Shapes’
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How many times are the instructions repeated?
Try making a square using the button. If you get stuck click on the square for help.
Can you make squares of different sizes?
What do you need to change?
SquareForward 2Right Turn 90o
Forward 2Right Turn 90o
Forward 2Right Turn 90o
Forward 2Right Turn 90o
R
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CM CMR 4 [ FORWARD 2 RIGHT TURN 90O
]GO
90o
90o
Back to ‘Shapes’
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Pentagon
How many times will the instructions repeat?
Have a look at the instructions for a square and triangle and see if you can
see a pattern.
RTry making a pentagon using the button. If you get stuck click on the pentagon for help.
Can you make pentagons of different sizes? Can you make irregular pentagons? The internal angles add up to 540o
Have a go!
Clue: Each angle of turn for Roamer is 72o
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CM CMR 5 [ FORWARD 2 RIGHT TURN 72O
]GO
The internal angles are each 108o for a regular pentagon. (Think of Roamer continuing in a straight line and turning from that line. Remember angles on a straight line add up to 180o and 180-108= 72)
108o
108o
108o108o
108o
72o
Back to ‘Shapes’
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TriangleForward 2Right turn 120Forward 2 Right turn 120Forward 2Right turn 120
How many times are the instructions repeated?
RTry making a triangle using the button. If you get stuck click on the triangle for help.
Can you make triangles of different sizes? Can you make different shaped triangles?
What do you need to change?
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Try
CM CMR 3 [ FORWARD 2 RIGHT TURN 120O
]GO
Look at the angles of the triangle. Are they right angles?
The internal angles of a triangle add up to 180o
For this triangle, each internal angle is 60o
Roamer needs to turn 120o as angles on a straight line add up to 180o
60 o
120 o
60o
60o 60o
Back to ‘Shapes’
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Rectangle
Where do the instructions repeat? How many times?
Why are the instructions a bit more complicated?RTry making a rectangle using the button.
If you get stuck click on the rectangle for help.
Forward 4Right turn 90o
Forward 2Right turn 90o
Forward 4Right turn 90o
Forward 2Right turn 90o
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CM CMR 2 [ FORWARD 4 RIGHT TURN 90O
FORWARD 2 RIGHT TURN 90O
]GO
90o
90o
Back to ‘Shapes’
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Try making a uniform cross using the button.
If you get stuck click on the cross for help. Can you make crosses of different sizes and widths?
Cross
Take care with the left and right turns with this shape.Have a look at the repeat pattern carefully.
R
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CM CMR 4 [ FORWARD 1 RIGHT TURN 90O
FORWARD 1 RIGHT TURN 90O
FORWARD 1 LEFT TURN 90O
]GO
Or try:
CM CMR 4 [ R2 [ FORWARD 1 RIGHT TURN 90O
] FORWARD 1 LEFT TURN 90O
]GO
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Making Music
Look for button with the musical note. press two numbers -
The first number tells Roamer the length of the note – 1 makes the shortest note, 8 makes the
longest note. The second number tells Roamer how high or low the note is – 1 makes the lowest note, 13
makes the highest note. 14 makes a rest (a silent note).
Carry on pressing different sets of 2 numbers to make a range of notes.
Then press Try it!
CMCM
GO