Hello everybody,I am new to the Arduino environment and I am planning to build a project involving counting the number of passes. The thing is I don't know which sensors are best to use. I was considering 2 ultrasonic sensors (beside counting I also need to know the direction so I need 2 sensors placed at a certain distance to detect if the movement is left-right or right-left), but 2 of those would probably interfere with each other, or 2 infrared obstacle avoidance sensors, but those don't seem to work at the distance I need (1-1,5 m). I know the alarm systems use a laser or some kind of beam which reflects on a surface and then returns - that seems to be the best solution, but I could find a sensor like that (probably a combination of 2 - emitter + receptor), but the best solution would be something that does not require any other objects (like a reflector). What do you think I could use?Thank you,Adrian
I need to count the people entering and going out a door.
How accurate do you have to be?
I need to count the people entering and going out a door...