1. Feedback: More than Loud Noise and Joysticks
James Wnorowski

2. What is Feedback? When you put a microphone too close to a speaker?
Force Feedback Joysticks?
Something else entirely?

3. Stability Which pendulum is stable, and why?
Both placements are in equilibrium.
What happens if I push each mass a little to the side?

4. Demo The first time, I just let the flashlight fall
The second time, I moved my hand so that it was under the flashlight, preventing it from falling
This is an example of Negative Feedback

5. Feedback, Revisited

6. Review To make systems stable, we use Negative Feedback.
Joystick an example of Negative Feedback.
Speaker / Microphone combination an example of Positive Feedback.