Arduino ultrasonic sensor alarm

I wanted to make an old project I made years ago. It's an alarm where the ultrasonic sensor picks something up within a range. When that happens, buzzers make a lot of sound and led lights are flashing. The video you see right now is the first version since I don't have all the parts yet. I want to add a liquid crystal dislpay where it shows how long it have been that the last alarm has set. A button will also be added to turn off the alarm if it is ringing.

In the video I will explain what is happening, what the process is and I will show how the device works. The second version will be uploaded ASAP when I get the right parts.

Program:

Official Arduino program

Programming Language:

C++

Experiment purpose:

To remember my old skills

To expand a project I made earlier

Github