Hand Crank Alternator

[freddy12]

Hi Folks: I finally got my gears figured out thanks to bergerud, These are made out of 1/2 " MDF and mesh very nice. Here are some pics. This is going to be a teaching tool for young science students, so they can learn how electricity is made!

[want2b]

Hope some of them realise how much effort you put into this learning tool. You've really used your imagination and shop expertise on this one.
Rick H

[tierman]

Very cool!!! Wish I knew how electricity was made.

[cestout]

I am trying to figure out what your did. Does it make pulsating DC? Do you have magnets in the big wheel that pass by wires?
Clint

[freddy12]

The center plate has three coils of 150 turns ea. of 22 ga. magnet wire, the two out side magnet rotors have 6 ea of 1/8 X1X1 neo magnets. with each pole facing opposite, north ,south in a zigzag pattern. As the rotors turn this produces alternating current or AC single phase. AC is not good for charging batteries, so it is then run through a bridge rectifier to convert it to Direct current.

[lynnfrwd]

I remember 5th grade. My teacher had a hand crank and made us all get in a circle holding hands, while it was turned. The electricity went through all of us....I was terrified!!

[blhutchens]

Looks like it would be a good catfish call too……...

[dbemus]

As a former science teacher I appreciate the value of this project as a teaching tool. The students are fortunate to have you as their teacher. Great project!
dbemus

[freddy12]

The science teacher is a friend of mine, He knows I like to tinker with stuff like this. He says he cant keep them away from it now!

[blhutchens]

I remember 5th grade. My teacher had a hand crank and made us all get in a circle holding hands, while it was turned. The electricity went through all of us....I was terrified!!

I had the same experience. It was all good until someone decided to loose their grip….next person in line gets a pretty good jolt.