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Value Control with Variables

Value Control with Variables. Joe Long Robofest Student Assistant Lawrence Tech Computer Science Major jl0109@gmail.com April 12, 2007. Create the variable. Navigate to the ‘Edit’ menu (next to ‘file’) Click on ‘Define Variables’ Click ‘create’ and enter the variable information

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Value Control with Variables

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  1. Value Controlwith Variables Joe Long Robofest Student Assistant Lawrence Tech Computer Science Majorjl0109@gmail.com April 12, 2007

  2. Create the variable • Navigate to the ‘Edit’ menu (next to ‘file’) • Click on ‘Define Variables’ • Click ‘create’ and enter the variable information and type. • Click ‘Close’

  3. Getting the light value • Open the ‘complete’ block menu ( ) • Find a Light Sensor block and drag it onto the field.

  4. Saving the value to a variable • Find a Variable block and drag it onto the field. • In the block’s options panel, change it’s Action to ‘Write’ and select your created variable from the List.

  5. Make the Data Wires(light value saved to a variable) • Click on the ‘tab’ sticking out of the light block ( ), then click on the back ‘tab’ sticking out of the ‘write’ mode variable block • The wire should look like this:

  6. Read the variable • Drag another variable block onto the field. • In the options panel, select your variable from the list and set the mode to ‘read’. • The block should look like this When you are done:

  7. Add 2 to the variable • Find the ‘Math’ block and drag it onto the field. • Draw a data wire from the second variable block to the ‘A’ tab on the math block:

  8. Using the math block • Open the math block’s options panel. • Set the Operation to ‘Addition’ • You can see that the space for ‘A’ is grayed out, as it is already used. • In the ‘B’ space, type in ‘2’

  9. Convert the answer (number) to text for displaying • Find the Number to Text block • Draw a data wire from the ‘#’ tab of the math block to the ‘#’ tab of the conversion block.

  10. Displaying the value • Find the Display block and put it on the field: • In the display block’s options panel, set the Action to ‘Text’ (the location can also be experimented with) • The block should now look like this:

  11. Displaying the value • Open the display block’s drop down menu (by clicking on the line at the bottom edge of the block) • Connect a data cable from the output of the converter to the ‘T’ tab of the display block.

  12. Display the data for 5 seconds • Find a Wait block and drag it onto the field: • In the options panel, set the Control to ‘Time’ and input 5.

  13. Complete Steps: • Read the light value • Save it to a variable • Do…. Whatever comes in-between… • Read the variable • Do any required math • Convert the number to text • Display the text • Wait some time before continuing

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