Book Image

Arduino for Kids

By : Priya Kuber, Rishi Gaurav Bhatnagar, Vijay Varada
Book Image

Arduino for Kids

By: Priya Kuber, Rishi Gaurav Bhatnagar, Vijay Varada

Overview of this book

The mission of this book is to integrate technology with the tools that children already use for crafts so that they feel that the technology is an extension of their playtime. We use coding, sensors, and micro-controllers integrated with art and craft supplies, origami, and Playdough. There are 10 fun-filled chapters that talk to children directly, and give clear instructions for non-technical parents too. We use Arduino as the controller of choice due to its easy availability and large community. By the end of the book, children will comfortably be able to set up their Arduino, read and understand code, manipulate code, and ultimately write their own code for projects. They will also be able to use basic sensors and know how components connect to each other. All the learning takes place with lots of colorful pictures and the circuits are neatly presented using wiring.
Table of Contents (18 chapters)
Arduino for Kids
About the Authors
About the Reviewers
Customer Feedback

Measuring the conductivity of soil

You can visualize the soil to be a kind of resistor, similar to the LDR we used earlier. The lesser the water content, the more the resistance; and the more the water content, the lesser the resistance.

Now, before we try and figure out what kind of circuit to use for our project, we need to find a way in which we can connect our wires to the soil!

We know that metals are good conductors of electricity. We need to provide a voltage between two points in the soil. We can use a large metal object, like an iron nail that can be embedded into the soil such that it can be an interface between our circuit and the soil.

Usually, these objects that are used as an interface in order to make some measurement are referred to as probes. You might have seen doctors using probes used to measure muscle activity of an athlete:

Image source:

Muscle activity of an athlete being tracked using muscle probes.

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