In the below image, you can see the actual hardware setup developed by using our Arduino sensor circuit diagram as a reference.

 Here you can see that I am powering this whole setup from the external power adapter through a 12V DC jack. We have also marled the parts to make the connections easy to understand. Also note that we have covered the IR LEDs on the sensor with a black tape to make it point only forward, we will discuss more about that later. If you are completely new to IR sensors and wish to learn more you can check our Arduino IR sensor tutorial, where we have explained the basic working of the IR sensor module and how to use it with Arduino.

You can see our main controller, the “Arduino UNO R3”, is responsible for handling signals from IR sensors and doing some computation to calculate the speed of the object.

Here in the below picture, you can find our 16×2 LCD display unit, where users can able to see the speed of the moving object on it. If you are completely new to 16×2 LCD and wish to learn more about it you can check out our tutorial on Arduino 16×2 LCD display to understand the basic pinout layout and working of the 16×2 LCD display.