The project is designed to give a display of water level in a tank. The reading given is for the sale of 0 to 9. A priority encoder is interfaced to a decoder to get the display of water level on 7 segment display.
This is the circuit designed for an overhead tank advanced water level indicator. It is worked built around need encoder, BCD-to-7-segment decoder, 7-segment display and a few discrete parts. Because of high input impedance, priority encoder senses water in the container from its nine input terminals.
The inputs are connected with +5V. The ground terminal of the sensor must be kept at the base of the container (tank). Priority encoder has nine active low inputs and coverts over the active input to active low BCD output. It utilizes a 7-segment display to demonstrate the water level in numeric from ‘0’ to ‘9.’
The power supply consists of a step-down transformer 230/12V, which step down the voltage to 12V AC. This is converted to DC utilizing a Bridge Rectifier. The ripples are expelled utilizing a capacitive filter and it is then directed to +5V utilizing a voltage regulator 7805 which is required for the operation of various ICs and components.
The further project can be enhanced by interfacing it with a buzzer to alert when the water level falls below the minimum level.