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This project is comprised of 4 phases:
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Getting the Materials
- Solenoid Valves and Level Switch are taken out of an old washing machine.
- The two solenoid valves are used for draining and making up water. Whereas, the level switch is removed to control the level of water in the aquarium.
Assembling
- The solenoid valves and level switch are connected together with a relay to drain out water from the aquarium.
- The level switch is connected with a tube to enable the air pressure to rush in.
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Designing the Circuit and Sensor
- A turbidity circuit board is designed together with a sensor compromising a LED together with a Light Dependent Resistor (LDR) fitted into a liquid paper bottle.
- A pH sensor and also pH display unit is fitted onto a Perspex board.
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Programming
- A Programmable Logic Controller is used to control every action for specific conditions.
- An automation program is used for programming the EEPROM.
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Ramesh Rajandran displaying Aqua Kleen in the final competition at the International Science and Engineering Fair in Detroit, Michigan, May 2000.
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Connections
- Connections are made to the Programmable Logic Controller from each and every part of the project including the turbidity sensor and pH sensor, which is giving an output signal for automation.
Testing
- The Programmable Logic Controller is set on RUN mode to check for errors.
- Water is filled into the aquarium to start the process of changing the water.
- The drain solenoid valves initiate to start the draining for the dirty water in the aquarium. Errors are rectified as they occur.
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