This is the latest version of Public Lab's DIY Desktop Spectrometry Kit -- the Lego Spectrometer. It addresses issues of rigidity, sourcing, modularity, and image quality over previous versions.

We've been making and distributing [Do-It-Yourself spectrometers](/w//spectrometry) since 2011, and have been through [4 major kit versions](http://store.publiclab.org/collections/spectrometry) and hundreds of different community contributed modifications, new versions, changes, and more. 

## Get a kit

This is an open source kit, so you can just build your own -- but to **order parts for a kit**, visit the Public Lab Store:



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## Design goals

Over the years, we've identified a few really critical improvements that have been tough to solve:

* rigidity
* easy to source parts
* modularity - working together
* image quality

Our mission is to make it **easier, cheaper, and more accessible to do environmental monitoring**, and to do that as an open source, collaborative community. And of course part of that is cost -- while people build upon our kits with more expensive options and upgrades, we want the basic kit to be extremely affordable. 

## Quick start

[notes:grid:lego-quickstart]

## Questions

[questions:lego-spectrometer]

## Building your Lego Spectrometer

[activities:lego-spectrometer]

## Spectrometry activities

[activities:spectrometry-sampling]

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## Spectrometer calibration

[activities:spectrometry-calibration]

****


[![tinkercad.png](https://publiclab.org/system/images/photos/000/022/935/large/tinkercad.png)](https://publiclab.org/system/images/photos/000/022/935/original/tinkercad.png)



_Tinkercad model, below_

## Parts

### 3D models

* Tinkercad: https://tinkercad.com/things/43IqCTHE7Iz
* Thingiverse: https://www.thingiverse.com/thing:2711528

### 3D brick models

Lots of great brick models are available here: https://printabrick.org/ and on http://thingiverse.com

* assorted standard bricks: https://www.thingiverse.com/thing:2626413
* holey bricks: https://www.thingiverse.com/thing:1095326
* sloped brick: https://www.thingiverse.com/thing:527185
* corner L brick: https://printabrick.org/bricks/2357
* brick w/ peg: https://printabrick.org/bricks/2458 (I used this instead of a 1x2 hole brick + a friction peg, because I couldn't find a model for the brick)

Brick dimensions are nicely described in this diagram from Wikipedia:

https://commons.wikimedia.org/wiki/File:Lego_dimensions.svg