Resonance Demo

> This is a physics demo of resonance, a concept of natural frequency amplitude amplification. This started when a guest speaker came in for my colloquium to show a custom demo that he built. My physics professor jokingly asked the class to make one for the physics department and I made it my mission.

> Each ball has a different natural frequency and when the motor hits that frequency, the ball starts swaying at greater distances. A neat aspect of this demo is how only the ball corresponding to the current frequency is amplified, bringing a deeper understanding of resonance.

> The apparatus uses a stepper motor to move the platform where ping-pong balls filled with cement at different altitudes may move. The stepper motors are tied to a motor driver controlled by an Arduino Uno. A potentiometer sets the speed of the motor, or, the user can speak into a microphone at varying volumes to set the speed.