The water level indicator is defined as a system that gets information about the water level in tanks. By using the water level indicator we can overcome the overflow of water from the tankers.
. By using the water level indicator we can overcome the overflow of water from the tankers.
The principle of this circuit is very easy to understand and it is very practical. I used IC ULN-2003 in this circuit. If the water level rises in the tank, then the water comes into contact with probes which are from IC Pin 1 to 7 and thus the pin 7 through 1 high sequentially. Hence the equivalent output pins 10 to 16 will go low one after another and the LEDs from 1 to 7 will go in the order. If the water level is at the final probe Pin 7 then the sound is produced by the piezo-buzzer.