Zoetropes 7

Changes to my latest zoetrope design include:

15 segments.
This is the correct frame count.

Smaller circle.
This should make it easier to destinguish one frame from the other.

Only one object travelling around circle.
This should help with clarity by not making the images so "busy" and easier for the eye to follow.

Black background around circles.
This should help distinguish each frame from the other; making what is going on all the clearer.

Zoetropes 6

To do my last Zoetrope, I split the circle into 12 segments. The main reason for doing this is that it can be done with the compass as I do not have a protractor.

However, I do know trigonometry and it occured to me that I know 360 degrees divded by 15 is 24 degrees. If one creates a triangle within the circle with 24 degrees at the centre of the circle, the other two angles have to be 78 degrees. By utilising the Sine Rule, I can get the measurement needed to split the circle into 15 segments.

Set my compass to said measurement to divide the circle up into accurate segments.

Zoetropes 5

My latest zoetrope design did not work as well as intended. It still makes a nice kaleidoscope pattern, but it is not what I wanted.

I think this due to two reasons. First, I need more 15 frames, not 12. Secondly, I think I've done each frame a bit too big and so they are blurring together rather than remaining seperate. I think some black card to seperate each frame may help too.

Zoetropes 4

Ok, so in a complete change I've decided to drop the Pulsar idea as I feel it isn't really going anywhere.

However i have expanded on the motion of a ball idea. It to shows a ball travelling in a circle. Two other lines with their own balls will display the velocity vectors of the initial ball (x and y axis).

This could be used to visually explain the difference between Velocity and Speed making it educational as well as interesting to look at.

Zoetropes 3

In thinking how I am to expand upon my bouncing ball idea, I got thinking about Pulsars. They are cyclical, so it makes them ideal for a zoetrope.

This should explain what a pulsar is
http://www.youtube.com/watch?v=PebAA9vF90o


here are some vids on pulsars...

http://www.youtube.com/watch?v=uHEVo-LkDrQ

http://www.youtube.com/watch?v=HSyRMotOhoM

http://www.youtube.com/watch?v=wJAuQVhoNkY

http://www.youtube.com/watch?v=PDbw3runD_g

Zoetropes 2

As I ideally need an even number of panels, I think I might have a go at making my own Zoetrope.

Here are a couple of videos on how to make a simple homemade zoetrope...

http://www.youtube.com/watch?v=eHmSG1j7hXM

http://www.youtube.com/watch?v=7KdDbwwA008

Not sure I go much on the second one; the top of the chap stick gets in the way.

Zoetropes 1

I had an idea to show a ball falling for the Zoetrope. Now, this sounds really simple but I want to do it as accurately as possbile in that I show the acceleration of the ball as it falls and rebounds.

This is taken straight off Wikipedia (I know how terrible, but in this case it is accurate!)

"Under an assumption of constant gravity, Newton's law of universal gravitation simplifies to F = mg, where m is the mass of the body and g is a constant vector with an average magnitude of 9.81 m/s². The acceleration due to gravity is equal to this g. An initially stationary object which is allowed to fall freely under gravity drops a distance which is proportional to the square of the elapsed time. The image on the right [above in my case], spanning half a second, was captured with a stroboscopic flash at 20 flashes per second. During the first ¹⁄₂₀ of a second the ball drops one unit of distance (here, a unit is about 12 mm); by ²⁄₂₀ it has dropped at total of 4 units; by ³⁄₂₀, 9 units and so on."