Anemometer September 10, 2013 Today they are talking about weather for the Jr.FLL topic of
Disaster Blaster
and learning about gears.
http://netapps.marshall.edu/lego/lessonplans/Turnstile/Turnstile.html See how the yellow indicator moves as each "person" walks through?
This gearing counts 4 for one rotation.
Change to the gearing that has a 40 tooth gear meshing with the 8 tooth
gear.
Now the indicator is for 20 people.
For the last build
the yellow indicator goes around once when 100 "people" pass.
Add tires as cups to catch the wind.
Wow you are windy.