Generally, water stored in overhead tank is wasted due to over flow ,when the tank is full. This Project shows simple circuits of water level indicator with alarm.
- Jumper Wire
- LED (Red, Green, Blue)
- Resistor-1k ohm
- 9v Battery
- 9v Battery Connector
- on/off Switch
- ULN2003 IC
- Circuit Diagram
- This circuit can be used to indicate three levels of water in tanks.
- When metal contact is reached ,each Led starts glowing.
- When the tank is full buzzer starts ringing along with this all LEDs are ON.