This is a simple tool that will draw out a sine wave as you roll it across paper.
For my parts, I had to use sand paper to get the pen holder to fit onto the gear with little friction. Sand paper may be needed in other places as well.
Seeing how a sine wave could be drawn in a more physical/mechanical way has helped me as a student to understand it, and I hope to help others understand it too.
Anyone starting trigonometry, or anyone else interested.
Students should know how a graph works, such as what the X and Y axis are and what functions are.
First, you attach the wheel and the gear to the frame, in no particular order, using the pins. Pin 1 is for the gear, and pin 2 is for the wheel.
Next, you clip on the pen holder, such that the holder is on top of the gear and will move with it when rotated.
Finally, you may or may not want to add a rubber band around the wheel to help with friction.
After all the assembly is done, you simple put in a writing utensil (pens and sharpies work best), and then you push it across paper so that the pen draws across it.
Students, with the help of teachers, should have a more visual and tactile way of understanding the sine wave. It wouldn't be used as a grade, but more as a fun and quick way to demonstrate what the sine wave actually is.