Former President Donald Trump raised his hand in a salute during the performance of "Amazing Grace" before the NASCAR Coca ...

Not every hand gesture is universal. And sometimes, making what you think is an innocent gesture in one country can land you in hot water somewhere else. Just ask any traveler who's given a thumbs ...

[B. Aswinth Raj] wanted to control a VLC player with hand gestures. He turned to two common ultrasonic sensors and Python to do the job. There is also, of course, an Arduino. You can see a video ...