Report

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 X 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 X 8. Clearing The Last Entry If you make a mistake, then CE cancels the last entry X 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 X 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 X 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