Water level indicator

HITEC UNIVERSITY TAXILA,PAKISTAN

1. WATER LEVEL INDICATOR Presented to: Sir Shahbaz Presented by: M.Waqar Azeem (19-EE-187) Aneeq Akhalaq (19-EE-023) Zahid(19-EE-025)

2. Content Group 2 INTRODUCTION APPARATUS CIRCUIT DIAGRAM NEEDS AND USES WORKING CONCLUSION

3. INTRODUCTION Water level indicator used to express the level of water in water tank and boiler etc. different types of water level indicator are available in market like mechanical and electronics. This circuit not only indicates the amount of water present in the tank but also gives an indication when the tank is full. As the water continues to fill the tank, the LEDs light up gradually. Group 2

4. APPARATUS Transistor BC-547: BC547  is an NPN Bipolar Junction  Transistor . Mostly it is used for the switching purpose as well as for amplification purposes. LED: A light-emitting diode ( LED ) is a semiconductor light source that emits light when current flows through it. Group 2

5. RESISTOR: A  resistor  is a passive two-terminal electrical component that implements electrical resistance as a circuit element. In electronic circuits. BUZZER: A  buzzer  or beeper is an audio signaling device, which may be mechanical, electromechanical, or piezoelectric (piezo for short).  Group 2

6. Circuit Diagram Group 2

7. NEEDS: Over flow problems To prevent waste of To prevent waste of water Attention ADVANTAGES: Easy installation. Low maintenance. Compact elegant design Consume very little energy, ideal for continuous operation. Group 2

8. WORKING After the connections are made as per the circuit diagram the circuit is then excited by 9V battery. The positive terminal of the battery is given to bottom of the measuring tank measuring tank that generates the flow of ions in the liquid present in tank. The base of the three transistors makes contact with the water at three different levels such as low, medium and high. When the base terminal makes the contact with the water the current starts to flow from base to emitter terminal. This current flow in the emitter terminal makes the LED to glow at different levels. If the water level is full, then the circuits beep through the buzzer notifying that the water level is full. Group 2

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10. THANKS Group 2