Posts

Showing posts from May, 2017

Make a Wind Generator

Image
On May 19, 2017, kids came to the Pasadena Public Library to make wind turbines that would generate electricity by turning the shaft of a hobby motor. We were inspired by a project we found at https://www.exploratorium.edu/snacks/light-wind. The goal was to use the motors in reverse--instead of the electricity making the shaft turn, the turning would make electricity! We hoped to produce enough energy to light an LED bulb attached to the motor. It didn't work out that way, but we still made a great science lesson of it. I provided several different motors, but every time I tested them myself, I could not get the LED light bulb to come on. One kind of motor I got at Fry's was just too strong to turn in the wind. It probably would have needed blades several feet long and a floor fan wasn't going to produce enough wind. The other kind turned easily, but didn't generate quite enough voltage. (One of the kids accurately noted: "Don't you need more energy to oper…