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 since 2011, and have been through 4 major kit versions and hundreds of different community contributed modifications, new versions, changes, and more.
Kits now available
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:
Over the years, we've identified a few really critical improvements that have been tough to solve:
- 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.
So, this design tries to address each of these challenges with ideas and input from the community:
Assembly instructions are here:
Read the introduction post here:
Activities show how to use this project, step by step.
|Assembling the Public Lab Lego Spectrometer||-||-||@warren||-||-||1 replications: Try it »|
|Preparing a DVD-R to act as a diffraction grating||-||-||@MrBumper||-||-||0 replications: Try it »|
|Raspberry Pi spectrometer GUI||-||-||@cedarlodge||-||-||0 replications: Try it »|
|An evolution of the 3D print version of the Spectrometer||-||-||@ajy00||-||-||0 replications: Try it »|
|DIY-spectrometer episode 2 (using LEGO)||-||-||@TakeshiMatsumoto||-||-||0 replications: Try it »|
|1. Setting up the Raspberry Pi Camera for Wireless Streaming||-||-||@partsandcrafts||-||-||0 replications: Try it »|
|Spectrometer 3.0 add-on v2||-||-||@programmer1200||-||-||0 replications: Try it »|
|Prepare an SD card for a Raspberry Pi camera from scratch||-||-||@warren||-||-||1 replications: Try it »|
Activities should include a materials list, costs and a step-by-step guide to construction with photos. Learn what makes a good activity here.
Tinkercad model, below
- Tinkercad: https://tinkercad.com/things/43IqCTHE7Iz
- Thingiverse: https://www.thingiverse.com/thing:2711528
3D brick models
- 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: