When I started learning electronics, a water level indicator was the first project I made using some transistors, leds and a copper wire completely dipped in the water tank. But due to obvious reasons, it got rusted. Then I made the same project with aluminium wire, and again same thing happened. So I forgot about this project as there was no way I could get a stainless steel wire near me.
But recently, an idea came to my mind, of using ultrasonic sensor for the same project of using an ultrasonic sensor for the same project.
So, in this instructable I’ll show you how you can make a water level indicator using an ultrasonic sensor.”