Hacker News Reader

> guess they are sweeping their IR transmitter around just like a visible light

For very clever reasons: (from the article) Since they are projecting infrared with moveable projector they can sweep effects around the stadium, and cover the projector with cut outs to make things like hearts.

View on HN

That sounds like the wrist bands will auto-off their light when they stop receiving the IR signal. That's certainly possible and very simple which translates to high reliability.

Why do you say it's "possible"? It's what they're actually doing. I think practically nobody in this thread actually watched the linked video that explains the technology.

Why educate if it so much fun to guess around?! (:

Reply on news.ycombinator.com