Describe an open loop system that has not already been given as an example. Could the system benefit from feedback? Justify your answer. A timer-based toaster is an example of an open loop system. No, it wound not benefit from feedback describe a closed loop system that has not already been given as an example. Describe the feedback used. Explain why this type of feedback is used. A smoke detector is an example of a closed loop system. They use them to reduce a system's sensitivity to external disturbances.