Water Level Indicator Circuit With Buzzer. The water level indicator circuit consists of a transistor element and a buzzer which indicates the overflow of water or excessive water in the container. Yellow led level 2 indication of low water yellow led level 3 indication of 1 4 of water in the tank green led level 4 indication of half of water in the tank green led level 5 indication of more than half of water green led level 6 indication of nearing filling up the tank blue led level 7 full indication of tank and buzzer comes on.
With same principle green led glow when water level reaches to point c and finally buzzer beeps when water level reaches to d. A water level indicator alarm circuit is a system that relays information back to a control panel to indicate whether a body of water has a high or low water level. Connect pin 2 and pin 6 with each other and grounded with a 1uf 25v capacitor.
The logic implemented in this circuit is 555 timer is enabled when its reset pin is connected to logic high.
To begin the water level indicator project we need a 555 timer ic to put on the board and connect pin 8 to the vcc and pin 1 to the ground. Connect pin 4 to the ground through a 1 kω resistor. This circuit is simple and inexpensive as it using only a few parts like transistor buzzer resistor and a power supply battery. When the water level rises to the height of the probes then the 555 circuit will get enabled and the output of the 555 timer produces a square wave output with a frequency of about 62 hz.
