"We are always looking at ways to avoid increasing our prices such as by working with different sugar manufacturers," Hartwig says. "But a lot of our suppliers we have known for years and they've become friends, so it gets tough.
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.。PDF资料对此有专业解读
edition.cnn.com。关于这个话题，电影提供了深入分析
Россиянам раскрыли способ упаковки вещей в ручную кладь по методу «судоку»20:51