People counter in the doorway for entry and exit, how to implement via Arduino?

Question

Arduino

Good day!

The university was asked to develop and assemble a working counter of people at the entrance and exit. In my head, the implementation of this device looks like two receivers and emitters of infrared light opposite each other in a "counting" place, count the signal interruptions on the receiver (provided both are interrupted) and record information about the number.

I was given the task of writing an implementation on Arduino, maybe someone can tell me in which direction to dig, since I have not come across this IDE at all?

Answer 1

If the task allows interpretations, then use them.

• 1. Say that this is a 1-person wide touriquet with 2 spaced photosensors. It is so easy to count where a person went and how many of them passed.
  
• 2. Use a PC with cameras and AI, and put control (watchdog for PC) and display of results on the fool.
  

Answer 2

Damn, well, that's all. Organize a cycle, at the intersection of two sensors, you fix either the entrance or the exit. Depending on which sensor worked first.
As sensors, you can use: a pair of IR emitter / receiver, as you yourself wrote, a pair of laser / photodiode. Or an ultrasonic rangefinder.