Vernier Software and Technology
Vernier Software & Technology

Battery Tester


A battery is a device that changes chemical energy into electrical energy. It is a common power source for many household and industrial applications. Batteries need to be of a certain strength, or electric potential, in order to power devices successfully. Electric potential determines how strongly electricity is pushed through a circuit, much like pressure determines how strongly water is pushed through a hose. After extended use, batteries can drain to a point where the device they are powering may not work properly or at all. Using a Voltage Probe to make a battery tester is a great way to determine whether the battery you intend to use has enough electric potential to run your device.

Design Requirements

In this project, your challenge is to design and build a device for testing the usability of an AA battery using a Vernier Differential Voltage Probe. A battery will be considered “dead” if the voltage is below 1.2 volts. Your device, when activated, should cause the alligator clips on the voltage probe to touch the metal terminals on a battery. After testing the battery, your program should give feedback indicating whether the battery is good or needs to be replaced.

Sensors and Equipment

This experiment features the following Vernier sensors and equipment.

Additional Requirements

You will also need NXT Sensor Adapter and a LEGO MINDSTORMS EV3 robotics system.

Vernier Engineering Projects with LEGO® MINDSTORMS® Education EV3

See other experiments from the lab book.

0Introductory Project Robot Walker
1Data Display and Acidity Tester
2Plant Waterer
3Audio Assistant
4String Tension Tester
5Aquarium Monitor
6Cartesian Diver
7Sunscreen Tester
8Battery Tester
9Solar Tracker
10Magnet Detector
13Shell Game

Experiment 8 from Vernier Engineering Projects with LEGO® MINDSTORMS® Education EV3 Lab Book

<i>Vernier Engineering Projects with LEGO<sup>®</sup> MINDSTORMS<sup>®</sup> Education EV3</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: VST0730

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