Challenge Problem: Teams in a many-participant model airplane design competition are called to the central runway when it is their turn to compete, over 100 entrants are involved. When a team is called, it has three minutes to arrive at the runway. All too often, the team being called is delayed, because it is repairing or modifying its plane. A team that does not arrive after three minutes loses that run. Warnings are given at two minute and one minute intervals before the deadline. Traditionally, the announcer has issued these warnings orally over a public address system. Acoustics are poor, however, three races run simultaneously, with different starting times, and only some teams require the full three minutes to arrive. Thus, the proper issuing of these cues has been lax. The judges need you to design an automated system that will inform a given team how much of its three-minute sequence has elapsed. The system must send an appropriate signal (oral, auditory, or visual) to the relevant team, and the timing sequence must be initiated for each individual team from the judges’ bench. One of the key design issues is whether a wireless system or central light-panel is better, given the logistical constraints of the competition environment. Because the event operates on a strict budget, final cost also is an important factor.
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