Hackathons are chaotic environments where team coordination is critical. A LED sign app helps teams stay organized during intense coding sessions.
Display your team name so mentors and judges can find you. Show what you're working on to avoid duplication. Signal when you need help with "HALP" or "STUCK" messages that roving mentors can spot from a distance.
This low-tech coordination method has proven surprisingly effective in the high-energy hackathon environment.
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