Moisture Sensor Circuit Diagram (Design Thinking)

Pain point: The watering of plants in SBR requires manpower and frequent testing/watering due to the hot weather Singapore has. In addition, SBR imports and cultivates various different plants from other countries. Some of these plants originates from countries with cold climates that requires a lot of shade and water. As well as constant care.

Solution: Hence, the solution to this pain point would be to innovate an automated system. This automated system would not require additional electricity to power up, making it fully sustainable. In addition, this automated system can be paired up with other systems(music/lux/sprinkler) and save the manpower required to water and test the moisture of the plants.

How the system works:

The moisture sensor will be placed into the soil. When it detects there is insufficient moisture in the soil it will transmit a signal to the teensy. Once the teensy (acts as the brain of the circuit) detects the signal, it would be triggered to release another signal to the BJT (electronic switch). Which controls the flow of the current from power source to the voltage regulator. Then to the sprinkler, to activate it.