A. Hydroponic systems
It can be seen from Fig1 that the system consist of
reservoir as nutrient liquid container, a 25 W water pump
was used to make the nutrient flows up to the tank this pump
can draw approximately 13 litre per minute. One of the most
popular hydroponic system is nutrient film technique (NFT).
For this system, the flow speed of the nutrient liquid on
growing media was about 1 litre per minute which is
adjusted by using water tap. So the amount of time for pump
to be on was less than 1 hour per day. A floating switch was
placed in the tank to control electrical current to the pump.
The availability of the tank is highly recommended to avoid
the pump runs 24 hour per day. Overall system work is
supported by power that came from solar panel module.