The project is designed to give a display of water level in a tank. The reading given is in 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 overhead tank digital water level indicator. It is built around priority encoder, BCD-to-7-segment decoder, 7-segment display and a few discrete components. Due to high input impedance, priority encoder senses water in the container from its nine input terminals.
The inputs are connected to +5V. The ground terminal of the sensor must be kept at the bottom of the container (tank). Priority encoder has nine active-low inputs and converts the active input into active- low BCD output. It uses a 7-segment display to show the water level in numeric form from ‘0’ to ‘9.’
The power supply consists of a step down transformer 230/12V, which steps down the voltage to 12V AC. This is converted to DC using a Bridge rectifier. The ripples are removed using a capacitive filter and it is then regulated to +5V using a voltage regulator 7805 which is required for the operation of different ICs and components.
Further the project can be enhanced by interfacing it with a buzzer to alert when the water level is falls below the minimum level.
BLOCK DIAGRAM
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Hardware Requirements
- Transformer
- Diodes
- Resistor
- Capacitor
- Transistor
- 7-Segment Display
- Encoder
- Decoder
Software Requirements
- None
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