Spectrometry

The Public Lab spectrometry project is an open source community effort to develop low-cost spectrometers for a range of purposes. All open spectrometry hardware and software efforts are welcome here! **Join in by:** * Learning [what spectrometry is](#Whats+spectrometry) * Reading about goals and [asking great questions](#Frequently+Asked+Questions) * Building a basic spectrometer using [one of our starter kits](#Starter+Kits) * Trying (and critiquing) our [community-made how-to guides](#Activities) and posting your own * Building on others’ work; hack and remix the kits to refine and expand them * [Share your upgrades](#Upgrades) for others to try -- and perhaps for inclusion in an upcoming starter kit release or add-on kit **** ## Starter Kits Public Lab’s Kits initiative offers several starter kits, including many of the basic components, and instructions for constructing a basic visible light spectrometer. The point of the kits is to provide a shared reference design for building experimental setups onto. <div class="row"> <div class="col-md-6"> <a href="/wiki/desktop-spectrometry-kit-3-0"><img style="width:100%" class="img-rounded" src="https://cdn.shopify.com/s/files/1/0198/8618/products/OI0001322_1024x1024.jpg?v=1513178552" /></a> <h3>Lego Spectrometer Kit</h3> <p>Our most recent kit, incorporating community improvements while balancing low cost and ease of construction. Choose between webcam and Raspberry Pi camera versions and build attachments width standard Lego connectors.</p> <p> <a class="btn btn-primary" href="/lego"><i style="color:white;" class="fa fa-wrench"></i> Build one</a> <a class="btn btn-primary" href="http://store.publiclab.org/products/lego-spectrometer-kit"><i style="color:white;" class="fa fa-shopping-cart"></i> Buy one</a> </p> </div><div class="col-md-6"> <a href="/wiki/foldable-spec"><img style="width:100%" class="img-rounded" src="https://cdn.shopify.com/s/files/1/0198/8618/products/IMG_20170706_150656_876_1024x1024.jpg?v=1512139105" /></a> <h3>Papercraft Spectrometry Intro Kit</h3> <p>A $9 paper spectrometer which you can attach to a smartphone or webcam. It’s made of paper to reduce cost and complexity, and is mainly intended as an “introductory” or educational kit. The flat design can be printed on a laser printer or photocopied to make more.</p> <p> <a class="btn btn-primary" href="/wiki/paper-spec"><i style="color:white;" class="fa fa-wrench"></i> Build one</a> <a class="btn btn-primary" href="http://store.publiclab.org/products/papercraft-spectrometer-intro-kit"><i style="color:white;" class="fa fa-shopping-cart"></i> Buy one</a> </p> </div> </div> **** ## Activities This is a list of community-generated guides for specific applications using your spectrometry setup (either a [starter kit](#Starter+Kits) or a [modded design](#Upgrades)). These [activities can be categorized](https://publiclab.org/wiki/activity-categories), and some may be more reproduced -- or reproducible -- than others. Try them out to build your skills, and help improve them by leaving comments. Together, we can repeat and refine the activities into experiments. > **Note:** If you are working on an **urgent issue** such as a threat to your or someone else’s health, please know that these techniques may not be ready for your use; it's possible that they never will be. [Read more here](/notes/gretchengehrke/09-29-2016/common-low-cost-technique-limitations) ### Activity grid [activities:spectrometry] **** ## Upgrades Have you added to your starter kit, improved it, or redesigned it? Show others how to take it to the next level by posting a build guide here: [upgrades:spectrometry] <a href="/post?tags=upgrade:spectrometry,seeks:builds&title=How%20to%20do%20X" class="btn btn-primary">Add your upgrade guide here</a> <a href="/post?tags=request:upgrade,page:spectrometry&template=question&title=How%20do%20I...&redirect=question" class="btn btn-primary">Request or propose an upgrade</a> _Mods should include a parts list and a step-by-step construction guide with photo documentation. See an example._ **** ## Challenges We're working to refine and improve DIY spectrometry on a number of fronts; here, take a look at the leading challenges we're hoping to solve, and post your own. For now, we're using the Q&A feature, so just click "Ask a question" to post your own challenge. Be sure to add: * constraints: expense, complexity * goals: performance, use cases [questions:spectrometry-challenge] **** ## Builds There’s a lot going on in open source spectrometry -- if you’ve developed another open source design you’d like to show others how to construct, post it here! * [RamanPi](https://hackaday.io/project/1279-ramanpi-raman-spectrometer) * [Hackteria “drop”-style spectrometers](https://publiclab.org/notes/gaudi/04-03-2014/diy-micro-volume-spectrophotometer) / [DIY NanoDrop on Hackteria.org](http://hackteria.org/wiki/index.php/DIY_NanoDrop) * _Add yours here_ ##What's spectrometry? Colored light is often a blend of different colors. A spectrometer is a device which splits those colors apart, like a prism, and measures the strength of each color. A typical output of a spectrometer looks like this spectrum of the daytime sky, with the actual light spectrum at the top and the graph of wavelength (horizontal axis, in nanometers of wavelength) and intensity (vertical axis) below: [![sky.png](https://i.publiclab.org/system/images/photos/000/005/455/original/sky.png)](https://spectralworkbench.org/analyze/spectrum/19882) > Needed: overview of spectra, calibration, units, comparison, and fluorescence/absorption. Please edit this page or link to a resource, potentially [the Wikipedia page](https://en.wikipedia.org/wiki/Spectroscopy), although that's quite full of technical jargon. ## Software Spectral data can be analyzed with https://spectralworkbench.org to create spectra plots, find centers of emissions plots, and find similar spectra. Data also can be exported in various formats (JSON, CSV, XML) for further analysis and visualization. ## How does this compare to a lab instrument? The [Desktop Spectrometry Starter Kit](/wiki/desktop-spectrometry-kit-3-0) is only one part in an experimental setup, and the following shows where it fits in an overall diagram of a lab spectrometric setup: [![tmp_31873-IMG_20161027_101601_2-79757779.jpg](https://publiclab.org/system/images/photos/000/018/635/large/tmp_31873-IMG_20161027_101601_2-79757779.jpg)](https://publiclab.org/system/images/photos/000/018/635/original/tmp_31873-IMG_20161027_101601_2-79757779.jpg) [![tmp_31873-IMG_20161027_095939_2-108076392.jpg](https://publiclab.org/system/images/photos/000/018/636/large/tmp_31873-IMG_20161027_095939_2-108076392.jpg)](https://publiclab.org/system/images/photos/000/018/636/original/tmp_31873-IMG_20161027_095939_2-108076392.jpg) There are many, many different types of spectrometry and spectrometers -- many don’t even measure light. Even among those that do, some detect light in the ultraviolet range, and others in the infrared range of light. The range of Public Lab spectrometers depends on the range of the commercially available cameras we attach them to (~400-700 nanometer wavelengths). A commercially available product with a slightly wider range (from 335 to 1000 nanometers) is [available from Cole Parmer](http://www.coleparmer.com/Product/Cole_Parmer_Visible_spectrophotometer_335_to_1000_nm_wavelength_range_analog_output/UX-83055-10). **** ## Frequently Asked Questions [questions:spectrometry] Note our previous Frequently Asked Questions page, which [can be found here &raquo;](/wiki/spectrometer-faq) -- please help port these into the new system, here!...

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Lego Spectrometer /wiki/lego-spectrometer over 1 year ago by warren 18 13,941 7
Papercraft Spectrometer Intro Kit /wiki/papercraft-spectrometer over 1 year ago by joyofsoy 15 14,307 3
Raspberry Pi Spectrometer /wiki/raspberry-pi-spectrometer over 1 year ago by warren 3 7,404 0
Make a Public Lab spectrometer /wiki/economist almost 3 years ago by warren 28 37,602 1
Pi Camera /wiki/pi-camera over 1 year ago by warren 15 2,072 3
Oil Testing Workshop 4: Analyzing and Sharing /wiki/oil-testing-workshop-analyzing-and-sharing over 4 years ago by warren 4 276 1
DIY Oil Testing Advocacy /wiki/diy-oil-testing-advocacy over 4 years ago by warren 14 434 1
DIY Oil Testing Tools /wiki/diy-oil-testing-tools over 4 years ago by warren 7 430 2
DIY Oil Testing: Community /wiki/diy-oil-testing-community over 4 years ago by warren 14 339 2
Oil Testing Workshop 1: Design an experiment /wiki/oil-testing-workshop-design-an-experiment over 4 years ago by warren 12 470 3
DIY Oil Testing Questions /wiki/diy-oil-testing-questions about 3 years ago by warren 28 1,135 2
DIY Oil Testing /wiki/diy-oil-testing over 4 years ago by warren 18 668 1
Spectral Workbench Operations /wiki/spectral-workbench-operations 4 months ago by warren 15 1,534 2
Oil Testing Kit Construction /wiki/oil-testing-kit-construction almost 5 years ago by warren 10 506 1
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Desktop Spectrometer 3.0 parts list /wiki/dsk3 over 5 years ago by warren 3 2,018 4
Desktop Spectrometry Kit 3.0 /wiki/desktop-spectrometry-kit-3-0 almost 3 years ago by warren 77 18,035 15
Multispectral analysis for determining plant health /wiki/multispectral-analysis-for-determining-plant-health almost 6 years ago by btbonval 4 1,675 0
Oil Testing Kit Literature /wiki/oil-testing-kit-literature over 4 years ago by warren 9 373 2
Oil Testing Kit Illustrations /wiki/oil-testing-kit-illustrations about 6 years ago by warren 3 313 0
Spectrometer History /wiki/spectrometer-history about 6 years ago by mathew 4 1,365 0
Ottawa /wiki/ottawa over 5 years ago by warren 2 366 3
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Oil Testing Kit /wiki/oil-testing-kit almost 3 years ago by warren 132 7,497 6