Simple Soil Moisture Sensor Circuit

The video tutorial explains a simple circuit with an LED that indicates soil moisture levels. The LED remains on when there is no conductivity between two probes, such as in dry soil, and turns off when the probes are in wet soil. This circuit can also function as a water level indicator, turning the LED off when water is present and on when the water level drops. It serves as a practical tool for determining when to water plants.

Explain the relationship between conductivity and the LED's state in this circuit.

What happens to the LED when the probes are placed in dry soil?

Describe the behavior of the LED when the probes are in wet soil.

How does the circuit function as a water level indicator?

What indicates that you need to water your plants using this circuit?