1.6 Vanishing Vase

Now let’s do a little magic trick, do nothing, and then the vase somehow disappears.

../_images/1.6_header.png

Build the Circuit

../_images/1.6_fritzing.png

Load the Code and See What Happens

Load the code file (1.6_vanishing_vase.sb3) to Scratch 3.

When you use a magnet near the reed switch module, a vase will appear on the stage, take away the magnet and the vase will disappear.

Tips on Sprite

Select Sprite1 and click Costumes in the top left corner; upload desk1.png and desk2.png from the home/pi/raphael-kit/scratch/picture path via the Upload Costume button; delete the default 2 costumes, and rename the sprite to desk.

../_images/1.6_vase.png

Tips on Codes

../_images/1.6_reed2.png

When the magnet is close to the reed switch module, gpio17 is low, and the costume of the desk sprite is switched to desk1 (the vase is still on the desk).

../_images/1.6_reed3.png

After taking away the magnet, gpio17 is high, at this time the costume of the desk sprite is switched to desk2 (only one desk).