- You set a desired temperature. When it is below the desired temperature, your area gets warmer. When it is above your desired temperature, your area gets cooler. How does this system work?
- You put some food in a microwave oven and set a power and time, and then push start. What kind of feedback loop is this?
- As you walk towards some automatic doors, a sensor sends a signal to an actuator which then opens the door. Do the doors open more quickly if you are walking quickly towards them?
- You use GPS to get your position. How does GPS work?
All the example above are control systems. There is usually a sensor, a micro-controller, and an actuator that come together to produce a desired behavior.