The spinners are weighted knobs that you can spin freely in either direction. Inside, a rotary encoder produces two square wave signals (A and B) that are 90 degrees out of phase. By counting the edges and checking which signal leads, you can determine both the speed and direction of rotation. We sample these at 1kHz in firmware and report the accumulated counts as an axis value in the HID reports.
小米在 Vision GT 的尾灯周围布置了密集的微孔，系统会根据车速和转向角度主动向后方喷射高压气流，来「推开」尾部产生的乱流。
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