4. Case 02: Speed Up Gradually

4.1. Purpose


  • In case 01, we can find the Cutebot moves too fast to go steadily(the universal wheel goes off the ground) at the beginning.

  • We will learn to gradually speed up the car for a steady move at the beginning in this case.

4.2. Materials


4.3. Software Platform


MicroSoft makecode

4.4. Programming


Step 1

  • Click the “Advanced” to see more choices in the MakeCode drawer.

https://raw.githubusercontent.com/elecfreaks/learn-cn/master/microbitKit/smart_cutebot/images/cutebot-pk-1.png

  • A codebase is required for Cutebot programming, click “Add Package” at the bottom of the drawer, search Cutebot in the dialogue box and download it.

https://raw.githubusercontent.com/elecfreaks/learn-cn/master/microbitKit/smart_cutebot/images/cutebot-pk-11.png

Note: If you met a tip indicating incompatibility of the codebase, you can continue with the tips or build a new project there.

Step 2

  • Choose “show icon” in the On startbrick.

  • Set the speed variable to 0 which means the on start speed is 0. https://raw.githubusercontent.com/elecfreaks/learn-cn/master/microbitKit/smart_cutebot/images/case_02_01.png

Step 3

  • Drag setting speed bricks for left and right wheel and set the value as speed in “forever” brick, then add one to speed.

  • If speed is 100 which is the maximum speed, set speed to 0 and restart it.

https://raw.githubusercontent.com/elecfreaks/learn-cn/master/microbitKit/smart_cutebot/images/case_02_02.png

Programming

Links: https://makecode.microbit.org/_6X6aA3cKKMAt

You can also download it directly below:

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4.5. Result


  • The Cutebot speeds up gradually and the universal wheel will not go off the ground due to the high speed.

4.6. Exploration


  • How to program to make the car speed up gradually and then speed down gradually?

4.7. FAQ


4.8. Relevant Files