Sine Tool

thingiverse

This tool will draw out a smooth curve known as a sine wave when you roll it across paper. For me, getting the pen holder to fit onto the gear with minimal friction required using sandpaper. Sandpaper may be needed in other areas as well. Project: Objectives: Seeing how a sine wave can be drawn in a physical/mechanical way has helped me grasp its concept and I aim to share that knowledge with others. Audiences: This project is perfect for students starting trigonometry or anyone else curious about the subject. Preparation: Students should understand how graphs work, including what the X and Y axes are, as well as functions. Steps: Firstly, attach the wheel and gear to the frame using pins. Pin 1 goes on the gear and pin 2 goes on the wheel. Next, clip on the pen holder so it sits atop the gear, allowing it to move with the gear when rotated. Finally, you may want to add a rubber band around the wheel to help reduce friction. After assembly is complete, simply insert a writing utensil, such as a pen or sharpie, and push it across paper, causing the pen to draw a sine wave. Results: With the assistance of teachers, students should gain a more hands-on understanding of the sine wave. This project won't be used for grading but rather as a fun way to visually demonstrate what a sine wave actually is.