IR Emission Module

This sensor has an IR-transmitter and IR-receiver, the transmitter sends an IR signal to be received back by the receiver. If the IR signal is received back, that means that no obstacles are detected, otherwise yes.
This sensor module is used in a lot of electronic devices such as robotics, collision detection and collision avoidance, tracking systems…
You can make one of the above application to detect an obstacle in front of your system and so on.