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Lego Spectrometer
question: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: ## 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...


Author Comment Last activity Moderation
rrajbhar754 "Very nice post. " | Read more » almost 3 years ago
warren "Hi! I've noticed that the Pi runs /much/ faster when adequately cooled -- strange but true, because I think it throttles to reduce temperature. So..." | Read more » almost 3 years ago
danieisnietgek "Thanks changed it like you mentioned " | Read more » almost 3 years ago
bsugar "@danieisnietgek, I'm not sure if you can edit the title, but if have a suggestion which is that you add something about the raspberry pi. For exam..." | Read more » almost 3 years ago
jevs "Apparently a capital F and a lowercase f mean something different. I changed my post to a lowercase f=3.85mm. Apparently f is focal length and F is..." | Read more » almost 3 years ago
stef "there may be some answers for you in the research notes produced by @Stoft and @Warren on the topic of camera's native resolution and optics as a ..." | Read more » almost 3 years ago
devolperdev "Very Nice article Thanx for this useful jobkari My recent project is jobkari.com make sure to visit jobkari " | Read more » almost 3 years ago
jevs "What is the best focal length No IR lens to get? " | Read more » almost 3 years ago
jevs "No luck on this one either. Not sure what portion of this lens assembly is the IR portion, but there was not a single layer on the back like I was ..." | Read more » almost 3 years ago
jevs "The only kit I see for sale is the Lego kit? I do not see them selling a v3.0 kit? I plan to make my own case (Have CNC mill, laser cutter, Resin ..." | Read more » almost 3 years ago
stef "save some time and get the v3.0 kit from the store and research the notes from @Stoft and @Warren, one thing to keep in mind when using card stock ..." | Read more » almost 3 years ago
jevs "It "looks" just like the one at the top of this page within the blue legos. https://store.publiclab.org/collections/featured-kits/products/lego-spe..." | Read more » almost 3 years ago
stef "Can you further identify the camera? Is it used in any of the projects? Were can I purchase one? Im curious is there a data sheet available for iit..." | Read more » almost 3 years ago
jevs "Yeah. I understand what your saying and I had seen many cameras like this on the net where people removed the IR filter, but this one has nothing t..." | Read more » almost 3 years ago
stef "In your second image look at the ccd sensor identified as V2 ithas a reddish tint to it look for something like that on the back end of the lens as..." | Read more » almost 3 years ago
jevs "Unfortunatly the lense in the removable piece was only one piece as far as I can tell. It did not have the separate piece like I see on many of the..." | Read more » almost 3 years ago
stef "The ir cut filter should be on the back of the lens barrel assembly you can check for it by looking at an angle and look for a greenish irradiance,..." | Read more » almost 3 years ago
stef "if you read my research note,it was quite specific about the model of the spectrometer used in the plab spec 3 model as supplied I have no idea whe..." | Read more » almost 3 years ago
jevs "I looked and it seems like you may be talking about the laptop camera module? This is the one I was messing with... I am not sure where the ..." | Read more » almost 3 years ago
dbbaldha "Click here to know about the ayurveda Ayucare blogspot provides information of Ayurved medicines, treatment, home remedies, natural remedies, ayurv..." | Read more » almost 3 years ago
stef "Hi, the camera used in the plab spectrometer does indeed have an ir filter' I published a note quite some time ago on how I did it. please do a sea..." | Read more » almost 3 years ago
liz "Hi @vnourrit, when you write "tricky splitting process" are you referring to having to manually peel apart the flat layers of the DVD? If so, the ..." | Read more » about 3 years ago
phibli "@jenjimah I also struggled with this and give your workaround using OBS a go. Let's see...keep you posted! :) @warren has anyone tried to use the ..." | Read more » about 3 years ago
jenjimah "Yes when you see the live webcam feed on pi.local, you're basically just accessing a website which is streaming the pi camera video, so it doesn't ..." | Read more » about 3 years ago