Motion Detection

Can IR sensor detect the motion of a gun bullet or that is impossible ?!!

I doubt the typical hobby active IR sensor can do that. A PIR sensor certainly cannot. A higher end, professional IR sensor might be able to, but I couldn't say for certainty. A bullet's small size, speed, and even shape (round) are what make it hard to sense.

if you hit it right in the eye :slight_smile:
(sorry could not resist)
What is the approx speed of the bullet at moment of detection?
If the bullet flies 600km/hour = 170m/s and your camera can make 50 images per second
than the bullet flies 3 meter per image - will be very hard