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Lego IR Receivers - How do they work?

barakamon · 2015-12-31T21:21:33.000Z

I'm on the planning stages of getting my Technic Arocs RC'ed, but having never worked with IR receivers as of yet, I am not sure how they work. Do they have to be visible or "within sight" from the controller's viewpoint all the time? Would hiding it inside the cab make transmission issues?