Want to talk about soil contamination? Join us on any Tuesday Open Call in February and March. We'll kick-off a research area review on this topic on Feb. 2! Click here for details on how to join!

Lego Spectrometer

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: <div style="margin:20px 0;"> <div id='product-component-ab665e9d252'></div> <script type="text/javascript"> /*<![CDATA[*/ (function () { var scriptURL = 'https://sdks.shopifycdn.com/buy-button/latest/buy-button-storefront.min.js'; if (window.ShopifyBuy) { if (window.ShopifyBuy.UI) { ShopifyBuyInit(); } else { loadScript(); } } else { loadScript(); } function loadScript() { if (!window.hasOwnProperty('shopify')) { shopify = true; var script = document.createElement('script'); script.async = true; script.src = scriptURL; (document.getElementsByTagName('head')[0] || document.getElementsByTagName('body')[0]).appendChild(script); script.onload = ShopifyBuyInit; } } function ShopifyBuyInit() { var client = ShopifyBuy.buildClient({ domain: 'publiclab.myshopify.com', storefrontAccessToken: 'ea3cc579c4c8dfc19b1de781173fc46e', }); ShopifyBuy.UI.onReady(client).then(function (ui) { ui.createComponent('product', { id: [499905232924], node: document.getElementById('product-component-ab665e9d252'), moneyFormat: '%24%7B%7Bamount%7D%7D', options: { "product": { "variantId": "all", "contents": { "imgWithCarousel": false, "variantTitle": false, "description": false, "buttonWithQuantity": false, "quantity": false }, "styles": { "product": {}, "compareAt": { "font-size": "12px" } } }, "cart": { "contents": { "button": true }, "styles": { "footer": { "background-color": "#ffffff" } } }, "modalProduct": { "contents": { "img": false, "imgWithCarousel": true, "variantTitle": false, "buttonWithQuantity": true, "button": false, "quantity": false }, "styles": { "product": {} } }, "productSet": { "styles": { "products": {} } } } }); }); } })(); /*]]>*/ </script> </div> ## 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] **** ## 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...

Learn more »