Do You Want to Build a Snowman?
This project shows how to build a dancing snowman, with the Raspberry Pi and PivotPi – a servo controller built just for that!
Scratch is used to code the dancing snowman and Sonic Pi generates the Holidays music.
Build the Snowman
Get a post of some sort that will tall enough to hold the snowman.
Attach two medium servos to the lower half of the post, eye-balling their approximate position. Servo placement determines the type of movement you will get. If you place a servo in the center of one of the circles, you’ll get a pure rotation movement. That looks good for the central part with the arms. Attach the arms to the body using tape, the arms don’t move, it’s the body that will rotate.
If you place a servo higher than the center of the body circle, you’ll get a swing effect which looks nice for the bottom part. It’s not a precise science (it could be, but it’s not necessary to be that precise for a snowman), but about 1/3 up looks nice.
The top servo – a small one – controls the head. We will use a short piece of balsa wood as a neck, the lower part of which is attached to the servo and the upper part is attached to the head. This allows the snowman to move its head side to side. The balsa wood uses double sided tape to stick to the head part.
Time to decorate the snowman! Googly eyes, candy cane and all!