I would like to design a system in which I am able to make a light flash when a motion sensor detects a movement of a non human object such as a car.
(The goal here being that when a car is moving behind me in my blind spot around the corner of a wall in my parking spot I don't back into it.)
I have looked into a few tutorials using arduinos to detect this motion but so far I have only read about the PIR (which only detects humans and animals).
What sensor would be best for this situation or do I need to rethink my system?
(I have no intention of harming anyone or anything :) )