How to make DIY water level alarm

when we add water to tank through motor, the water overflows and the water gets wasted. You will be needing water indicating alarm to inform you before the water overflows. This indicating alarm is expensive. So this tutorial video gives a knowledge on how to make water indicating alarm in your home without much cost .


components:
      47k-7
      1k-7
      buzzer-1
      ic-uln2004
      capacitor-100 microfarad-1
      jumbo wires
      project board
      9v battery-1


circuit: