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. Lego Spectrometer Kit 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. Build one Buy one Papercraft Spectrometry Intro Kit 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. Build one Buy one **** ## 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] Add your upgrade guide here Request or propose an upgrade _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 »](/wiki/spectrometer-faq) -- please help port these into the new system, here!...

Author Comment Last activity Moderation
jhondue123456 "https://www.google.com " | Read more » 4 months ago
jhondue123456 "https://www.google.com " | Read more » 4 months ago
jhondue123456 "https://www.google.com/ " | Read more » 4 months ago
adminR0 "I downloaded the files into CURA 5.6.0 and CURA scaled them 1000 ! When I printed them they were micro sized. I tried used 2410.3 scale and it seem..." | Read more » 6 months ago
scifers "@warren are you still active on this site? I'm a teacher trying to work with the archived version and have some questions " | Read more » about 1 year ago
scifers "@warren are you still active on this site? I'm a teacher trying to work with the archived version and have some questions " | Read more » about 1 year ago
scifers "@warren Are you still active on this site? I'm a teacher trying to work out using the archived version and have some questions " | Read more » about 1 year ago
Ag8n "Take a look at the video for the standardization of the instrument. If I read it correctly, with a few changes in the software (they list the code..." | Read more » over 2 years ago
belkinsa "I built mine but haven't tested it yet as I need hunt down a CFL :frowning_face: .... " | Read more » over 2 years ago
B-winters "Stef, thanks for your interest, I have some new updates and they can be found in this open-source publication: https://doi.org/10.1016/j.ohx.2021.e..." | Read more » over 2 years ago
stef "@realestateediary Are there any further updates to this design? Re the razor slit or any geometric changes? I am very much interested in printing t..." | Read more » over 2 years ago
liz "FYI - this is posted as a question here: https://publiclab.org/notes/carmatic/02-24-2021/alternatives-to-cfl-for-calibration " | Read more » over 3 years ago
carmatic "hello, I'm trying to look for fluorescent bulbs but they are being phased out where I live and are becoming harder and harder to find is there an a..." | Read more » over 3 years ago
getbacklink "GetBacklink is Search Engine Optimization (SEO) Specialist analyzes Website, reviews and implements changes to websites so they are optimized for s..." | Read more » over 3 years ago
appz "http://vaishma.com/ " | Read more » over 3 years ago
appz "https://www.hallmarkauditors.com/services/business-incorporation/freezone-company-set-up-in-uae/ " | Read more » over 3 years ago
appz "https://www.aacsh.com/departments/urology-and-andrology/erectile-dysfunction/ " | Read more » over 3 years ago
PivotalMayfair1 "Facial hair rash is an irritating and at times agonizing condition. Fortunately it’s frequently simple to fix. Follow this bit by bit manual for ex..." | Read more » over 3 years ago
zoran69 "The Best Web Hosting Companies Choosing the best web hosting is tough. There are hundreds of options, and every web hosting claims to be the best o..." | Read more » over 3 years ago
theuntoldrecipe "gud Information, i M very Glad Bcoz I read Ur Information. " | Read more » over 3 years ago
Bhisham89 "In E-General Studies you can get General Knowledge of HP, Current Affairs of HP, Govt Job notification and Syllabus. " | Read more » over 3 years ago
Paragonxy "I really enjoyed reading your article. Maybe I will do more research about it and publish on Naijatechclan " | Read more » over 3 years ago
sammydoe28 "“Pro Software Company” is a leading outsourcing company with a highly talented team. We work with clients around the world. We provide Virtual Assi..." | Read more » over 3 years ago
Ag8n "I hate autocorrect. It's pyrolyzing, but autocorrect thought was an error and made it paralyzing. Sorry. " | Read more » over 3 years ago