Spectacle Inertia Board

The Spectacle Inertia Board makes it easy to sense motion or orientation with a Spectacle project. The Spectacle Inertia Board is designed to allow your Spectacle to detect whether it is moving or stationary, or whether it is under acceleration. At the heart of each Inertia Board is the trustworthy ADXL345 triple-axis MEMS accelerometer. The ADXL345 is a perfect fit for your Spectacle project when it comes to all things Inertia!

The Inertia Board is equipped with two 3.5mm TRRS jacks for Spectacle control signals from a Director Board. The one labeled “In” should be plugged into a board that is closer to the Director Board than the Inertia Board is, or into the Director Board itself. Make sure to pay attention to the directionality of the jacks, as they will dictate how your Spectacle modules speak with one another and with the Director Board. As with every other Spectacle module, you will need the Director Board to operate any Spectacle project.

We have written an in-depth User’s Guide and Inertia Board Hookup Guide to help direct you through each step of setting up this and any board in the Spectacle product line. You will be surprised by how easy and quick it is to make yourself into a Spectacle!


Spectacle is a product ecosystem centered around a simple idea: creative people shouldn’t have to learn new skills to use electronics in their projects. You’ve spent years developing the skills you use, and SparkFun wants to recognize that and help you expand your creations to include electronics without requiring you to spend years learning about electronics and programming.


Spectacle User's Guide Spectacle Programmer

Get Started with the Inertia Board

Spectacle Inertia Board Product Help and Resources

Spectacle User's Guide

May 4, 2017

The Spectacle system is designed to help those without electronics or programming experience integrate electronics into projects.

Spectacle Inertia Board Hookup Guide

May 4, 2017

Everything you need to know about using the Spectacle Inertia Board in one place.

Core Skill: Programming

If a board needs code or communicates somehow, you're going to need to know how to program or interface with it. The programming skill is all about communication and code.

1 Programming

Skill Level: Noob - Programming will be limited to basic drag and drop interfaces like ModKit or Scratch. You won't be writing code, but you will still need to understand some basics of interfacing with hardware. If you?re just using a sensor, it's output is analog.
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Core Skill: Electrical Prototyping

If it requires power, you need to know how much, what all the pins do, and how to hook it up. You may need to reference datasheets, schematics, and know the ins and outs of electronics.

1 Electrical Prototyping

Skill Level: Noob - You don't need to reference a datasheet, but you will need to know basic power requirements.
See all skill levels


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