There is a water tank located in a garden. It is used to water the trees, flowers and grasses in the garden A start and a stop button are used to initiate and terminate the operation, respectively.

The system starts to operate when either an ambient temperature sensor (NO contacts) or a humidity sensor (NO contacts) is triggered.

After either of these sensors is activated, a pump starts to operate and delivers water to the garden through a pipeline system.

There are 3 solenoid valves in the pipeline system.

Valve one is used to supply water to the trees for 15 minutes.

Valve two is used to supply water to the flowers for 10 minutes.

Valve three is used to supply water to the grasses for 5 minutes.