Vernier Software and Technology
Vernier Software & Technology

Magnet Finder


A shell game is a contest in which a person hides a small object underneath one of three nutshells, cups, or thimbles, and then rapidly shuffles them about on a flat surface. The spectators must pay close attention during the shuffling process in order to try and guess the final location of the hidden object. It is typically a sleight-of-hand swindling game. In this project, your challenge is to build a robot to play the shell game with you. The robot will act as the spectator, while you hide a magnet under one of three walnut shells. Then the robot will use a Vernier Magnetic Field Sensor to determine the location of the hidden magnet.

Design Requirements

In this project, you will design and build a mobile robot for pinpointing the location of a hidden magnet. The magnet should be hidden under one of three identical objects, such as walnut shells. The walnut shells should be laid out in a line so that the robot can drive by the shells while measuring the magnetic field of the area using a Vernier Magnetic Field Sensor. The location of the hidden magnet will be determined by feedback from the sensor of the strongest reading. Your robot should return to the location of the hidden magnet and give an audio indicator.

You are strongly encouraged to use the Engineering Design Method and your creative imagination when tackling this challenge. The Engineering Design Method will help you develop a successful working robot. A little planning will save you time and frustration, especially when working on more complicated projects.

Sensors and Equipment

This project features the following Vernier sensors and equipment.

Additional Requirements

You will also need NXT Sensor Adapter and a LEGO MINDSTORMS NXT robotics system.

Standards Correlations

See all standards correlations for Vernier Engineering Projects with LEGO® MINDSTORMS® Education NXT »

Vernier Engineering Projects with LEGO® MINDSTORMS® Education NXT

See other experiments from the lab book.

1Acidity Tester
2Plant Waterer
3Aquarium Monitor
4Sunscreen Tester
5Audio Assistant
6String Tension Tester
7Cartesian Diver
8Battery Tester
9Solar Tracker
10Migrating Robot
11Magnet Finder
12Mine Sweeper

Project 11 from Vernier Engineering Projects with LEGO® MINDSTORMS® Education NXT Lab Book

<i>Vernier Engineering Projects with LEGO<sup>®</sup> MINDSTORMS<sup>®</sup> Education NXT</i> book cover

Included in the Lab Book

Vernier lab books include word-processing files of the student instructions, essential teacher information, suggested answers, sample data and graphs, and more.

Buy the Book

Dev Reference: VST0498

Go to top