Want to talk about soil? Join us for Open Call every Tuesday until Mar. 30 and our kick-off call on this topic on Feb. 2! Click here for details on how to join!


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!...

Follow
Learn more »

Contributors for question:spectrometry


People who've posted Notes
warren Notes »
mathew Notes »
liz Notes »
pablo Notes »
eustatic Notes »
cfastie Notes »
Markos Notes »
stoft Notes »
briandegger Notes »
bsugar Notes »
Bronwen Notes »
dsvilko Notes »
kgradow1 Notes »
JSummers Notes »
maxliboiron Notes »
nathanathan Notes »
31gane Notes »
bicwood Notes »
amirberAgain Notes »
amayas Notes »
amysoyka Notes »
Henry0815 Notes »
WhiteRabbit Notes »
bowlerhatman Notes »
masolaric Notes »
jaia Notes »
upson Notes »
ICSK Notes »
gretchengehrke Notes »
Pushpaw Notes »
MrBumper Notes »
stinge_nz Notes »
Ripingill Notes »
martin-slavik Notes »
klie Notes »
leanr Notes »
lukebrown Notes »
Gasam Notes »
fieldlab Notes »
tonyc Notes »
clmchenr Notes »
QMTphysicist Notes »
vafa Notes »
pdhixenbaugh Notes »
shubham Notes »
MadTinker Notes »
anjohn12 Notes »
Airship7 Notes »
cjtiaan Notes »
tim_spec Notes »
viechdokter Notes »
david_uwi Notes »
FortunaWolf Notes »
clownfish Notes »
Georgi Notes »
PeterDH Notes »
seko Notes »
AndrewJamesLaplante Notes »
Siphirobe Notes »
abdul Notes »
FoxClass Notes »
interestedperson_ha Notes »
stef Notes »
sylvainbonhommeau Notes »
suha Notes »
m3sca1 Notes »
fouadalnoor Notes »
haribhimaraju Notes »
redleon Notes »
sarahcm Notes »
CanfieldC Notes »
xose Notes »
shaikhgous Notes »
axman Notes »
Vman Notes »
tmanmerlin Notes »
idev247 Notes »
MaggPi Notes »
vgoebel Notes »
rahal Notes »
rajanzaveri Notes »
Mekis Notes »
osetroff Notes »
jjoll Notes »
savargaz Notes »
programmer1200 Notes »
1987123 Notes »
briankruse Notes »
LightWaveResearch8000 Notes »
obisidian Notes »
maltheR Notes »
islenos Notes »
Reallygeek Notes »
Dr_Z Notes »
jayjay70 Notes »
asnow Notes »
KushalKC Notes »
oglezsa Notes »
julsmill Notes »
RPiach Notes »
matthart610 Notes »
Doomik Notes »
IvanNik Notes »
Ag8n Notes »
Light_Guy60 Notes »
zayas Notes »
jht001 Notes »
jsbonillam Notes »
nyck31 Notes »
jpschaaf Notes »
partyparrot4eva Notes »
jordankc Notes »
UHF Notes »
amir129 Notes »
mountevans Notes »
Metamer Notes »
MarcioPamplona Notes »
Tomas0413 Notes »
thangvu Notes »
adamsanta Notes »
mintymac Notes »
gabrielxp46 Notes »
lavaux Notes »
troyb Notes »
raj Notes »
Aleksi12358 Notes »
jneish Notes »
amenzel8 Notes »
jaksch Notes »
exekutive Notes »
CD3000 Notes »
wln215 Notes »
mimiss Notes »
Skorex Notes »
KristinaTamara Notes »
Nelari Notes »
profpearce Notes »
willieong Notes »
omarion Notes »
dimitriconlan Notes »
bhamster Notes »
damian_orovitz Notes »
experimentierwerkstatt_dm Notes »
jkenny23 Notes »
Naumandhak12 Notes »
tasneim3mon3em Notes »
msuphysicsformcb Notes »