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Water Conservation: Discussing how smart irrigation systems can help conserve water and
promote sustainable gardening practices.

Understanding of Soil and Plant Needs: Students will learn about the importance of soil
moisture for plant health.
Observations

In the “Smart Soil System” activity in Tinker Orbits, students learn how to monitor soil moisture levels
to determine when plants need watering. They connect a soil moisture sensor to a robot brain and write
code that reads the moisture level. As they place the sensor in different soil conditions, they observe
how the readings change, providing real-time data on the soil’s moisture content. When the moisture
drops below a set threshold, the system can trigger an alert or activate a watering mechanism.

This hands-on activity not only enhances their understanding of sensors and automation but also
encourages discussions about the importance of water conservation and smart gardening practices.
If any issues arise, students practice troubleshooting their connections and code. Overall, this
experience deepens their understanding of environmental science, technology, and the role of
sensors in everyday life.

Applications

The uses of soil moisture system are:

Smart Irrigation Systems: Soil moisture sensors are used in automatic
irrigation systems to water plants only when
the soil is dry, helping conserve water and
ensuring plants get the right amount of water.
Agriculture: Farmers use soil moisture sensors
to monitor soil conditions in fields. This helps
in optimising crop growth and improving yields
by ensuring crops are watered efficiently.

Light Sensor

A light sensor is a device that detects light levels in its environment and converts the light energy
into an electrical signal.

They are essential in systems where the amount of light needs to be measured or controlled
automatically.
LDR

LDRs are tiny light-sensing devices also known as photoresistors. An LDR is a resistor whose
resistance changes as the amount of light falling on it changes. The resistance of the LDR decreases
with an increase in light intensity. This property allows us to use them for making light sensing
circuits.

Programmable Activities with Tinker Orbits Kit 39