A Guide To
Using Roamer
X
Menu
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
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
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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
X
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
[]
1
5
[]
GO
This will change each step to 15cm. Change the yellow
numbers to change the step sizes.
X
3. Forwards
The roamer moves forwards in roamer sized steps of
30cm.
To move forwards 30cm press
1
GO
To move forwards 60cm, 90cm etc. Change the 1
to 2 , 3 etc.
X
4. Backwards
The roamer moves backwards in roamer sized steps of
30cm.
To move backwards 30cm press
1
GO
To move backwards 60cm, 90cm etc. Change the 1
to 2 , 3 etc.
X
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:
9
0
GO
The 9 and 0 stand for 90o and should be
changed to fit the turn you want.
X
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:
9
0
GO
The 9 and 0 stand for 90o and should be
changed to fit the turn you want.
X
7. Putting It All Together
The instructions you have learnt so far can be added
together into a sequence.
Press
GO
at the end.
Remember to clear the memory before you start.
CM
CM
6
4
GO
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
X
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
CE
cancels the last entry
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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.
X
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.
X
10. Repeating Instructions
CM
CM
Clear Go Memory
R 2
Repeat No. Of Repeats
[]
Open Brackets
1
[]
9 0
1
9 0
GO
Instructions
Close Brackets Go
X
11. Shapes
Use the repeat command to make shapes
Click on the shape to find out more
X
Square
Forward 2
Right Turn 90o
Forward 2
Right Turn 90o
Forward 2
Right Turn 90o
Forward 2
Right Turn 90o
How many times are the instructions repeated?
R
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?
Back to ‘Shapes’
X
90o
90o
CM CM
R4
[
FORWARD 2
RIGHT TURN 90O
]
GO
X
Pentagon
Clue: Each angle of turn for Roamer is 72o
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.
R
Try 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!
Back to ‘Shapes’
X
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)
72o
108o
108o
108o
108o
108o
CM CM
R5
[
FORWARD 2
RIGHT TURN 72O
]
GO
X
Triangle
Forward 2
Right turn 120
Forward 2
Right turn 120
Forward 2
Right turn 120
How many times are the
instructions repeated?
R
Try 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?
Back to ‘Shapes’
X
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
Try
CM CM
R3
[
FORWARD 2
RIGHT TURN 120O
]
GO
60o
60o
60o
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Rectangle
Forward 4
Right turn 90o
Forward 2
Right turn 90o
Forward 4
Right turn 90o
Forward 2
Right turn 90o
Where do the instructions repeat?
How many times?
Why are the instructions a bit more complicated?
R
Try making a rectangle using the
button.
If you get stuck click on the rectangle for help.
Back to ‘Shapes’
X
90o
90o
CM CM
R2
[
FORWARD 4
RIGHT TURN 90O
FORWARD 2
RIGHT TURN 90O
]
GO
X
Cross
Take care with the left and right turns with this shape.
Have a look at the repeat pattern carefully.
Try making a uniform cross using the
R
button.
If you get stuck click on the cross for help.
Can you make crosses of different sizes and widths?
Back to ‘Shapes’
X
CM CM
R4
[
FORWARD 1
RIGHT TURN 90O
FORWARD 1
RIGHT TURN 90O
FORWARD 1
LEFT TURN 90O
]
GO
Or try:
CM CM
R4
[
R2
[
FORWARD 1
RIGHT TURN 90O
]
FORWARD 1
LEFT TURN 90O
]
GO
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Making Music
CM
CM
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!
GO