In this electronics project, I have explained how to make a simple Water Level Indicator using the BC547 transistor. A buzzer is also connected with the water tank level indicator circuit, so when the water level reaches maximum level the buzzer with starts along with indicator LEDs.

I have made this circuit on a DIY PCB made with a plastic sheet. So anyone can make this mini-project at home.

Water Level Indicator Circuit Diagram

The circuit is very simple, You can easily make this project with some basic electronics components.

Here I have used only BC547 NPN transistor to sense the water level. With the switch (S1) you can turn ON\OFF the buzzer.

I have used a 5V DC supply, but if you want to use a 12V DC supply, then use the 12V DC buzzer (no other changes required).

Required Components:

1k Resistors 4no

10k Resistors 4no

BC547 NPN Transistors 4no

5-mm LEDs 4no

DC Buzzer (5V)

Switch

Terminal connector

5V DC Supply

 you can also order the custom-designed PCB for this project from PCBWay.