We will need to give both the fan and the servo some height:
- The servo is placed high enough so the wand can dip down into the bubbles, then back up to catch the breeze of the fan.
- The Fan to have the air stream plow through the center of the wand to have the bubbles come out.
You can see the Lego pieces I used, your configuration may be different (this is why I chose Lego, fast prototyping, no sawing of wood or fiddling with metal).
Below is the final bubble blower assembled. It uses a base that is 10x10 and I used one that was one block high to give the fan and servo more lift when placed against the container of bubbles.
I originally had the fan back to provide a weaker blowing force for my first bubbles. I think adding additional solution made my mixture harder to blow so the fan was carefully moved close to the wand. This is the beauty of Lego and other methods of mounting, if you find your configuration isn't ideal, you can quickly change it. Everyone's situation is different.
Make sure the DC motor and the servo are connected to the Crickit per the diagram on the previous page, just in case you had to disconnect things to get them placed together. The final setup is pictured below: