Smartphone spectrometer
smartphone-spectrometer

This page refers to a product no longer sold by the kits department. Plans still exist but item is discontinued in favor of the desktop spectrometer and the foldup spectrometer. This info is here for archive purposes only. The final instructions (as sent to press) are here: smartphone-spec-instructions-p1-1.0.pdf smartphone-spec-instructions-p2.pdf ###List of parts * 3 injection molded plastic (ABS) parts * 2 short screws * 2 long screws * black paper liner * diffraction grating * protective film * precision printed slit * jewelers screwdriver ###Design files This being open hardware (CERN OHL 1.1), here are the files: PublicLaboratory_Mobile_Spectrometer_v31.zip These are also on Thingiverse: http://www.thingiverse.com/thing:116610 And here is a more 3D-printable version by Brad Dudenhoffer: http://www.thingiverse.com/thing:125428 Order a [3D print](http://3dinsider.com/3d-printers-for-sale/) on Shapeways here: https://www.shapeways.com/model/976427/public-lab-smartphone-spectrometer.html ###Instructions ![spec-instructions-1.png](https://i.publiclab.org/system/images/photos/000/001/722/original/spec-instructions-1.png) ![spectrometer-instructions-p2-good.png](https://i.publiclab.org/system/images/photos/000/001/724/original/spectrometer-instructions-p2-good.png) **** Sketchup model: smartphone-spec-overview.skp ##Mathew's Assembly Run## * 3 injection molded plastic (ABS) parts * 2 short screws * 2 long screws * 1 short black paper liner (5cm x 4cm) * 1 long black paper liner (5cm x 8cm) * 6 5cm lengths of double-sided tape * 1 5cm black foam tape * diffraction grating (5cm x 4.4cm) *protective film _I did without-- this extra step increases the chances of damaging the grating in order to protect it._ * precision printed slit * jewelers screwdriver * razor blade [See full image set here](https://www.flickr.com/photos/14397636@N07/sets/72157635289590145/with/9627692282/) ![spec.gif](https://i.publiclab.org/system/images/photos/000/001/336/medium/spec.gif) ###Adhesive options Here's a list of other adhesives and tape strips which may be helpful in assembling and mounting the spectrometer. Some may be shipped in the kits: * Tape strips are sold for costumes and wigs: http://www.amazon.com/Bonding-Double-Tape-Walker-Straight/dp/B00D7LA162/ * 3M's super strong 300LSE in letter sheets, ~$12 each: http://www.amazon.com/9474LE-super-strong-double-sided-adhesive-transfer/dp/B00CCGK31G/ ** these are an excellent option. 3M sells [24x36" sheets](http://multimedia.3m.com/mws/mediawebserver?mwsId=66666UF6EVsSyXTtlxTV5XM2EVtQEVs6EVs6EVs6E666666--) somewhere. we can save users any trimming through cutting to 6mm wide-- the width of the edges of the mountplate. one sheet = 300 30cm strips 6mm wide, giving each user 6 5cm pieces they can cut to length with their razor. Then there's no tape trimming to do when attaching. * Scrapbooking tape strips: http://www.amazon.com/Double-sided-adhesive-mounts-12-pack/dp/B00D5WDZXO/ (hard to find but good size -- big lots available on ebay: http://www.ebay.com/itm/New-72-Packs-Scrapbook-Double-Sided-Adhesive-Strips-/321157403796 is 3600 strips for $65, or 2c per strip) ###Photos Photos of the assembly process. [![IMG_1052.JPG](https://i.publiclab.org/system/images/photos/000/003/306/medium/IMG_1052.JPG)](https://i.publiclab.org/system/images/photos/000/003/306/original/IMG_1052.JPG) [![IMG_1043.JPG](https://i.publiclab.org/system/images/photos/000/003/307/medium/IMG_1043.JPG)](https://i.publiclab.org/system/images/photos/000/003/307/original/IMG_1043.JPG) [![IMG_1053.JPG](https://i.publiclab.org/system/images/photos/000/003/308/medium/IMG_1053.JPG)](https://i.publiclab.org/system/images/photos/000/003/308/original/IMG_1053.JPG) [![IMG_1054.JPG](https://i.publiclab.org/system/images/photos/000/003/309/medium/IMG_1054.JPG)](https://i.publiclab.org/system/images/photos/000/003/309/original/IMG_1054.JPG) [![IMG_1044.JPG](https://i.publiclab.org/system/images/photos/000/003/310/medium/IMG_1044.JPG)](https://i.publiclab.org/system/images/photos/000/003/310/original/IMG_1044.JPG) [![IMG_1046.JPG](https://i.publiclab.org/system/images/photos/000/003/311/medium/IMG_1046.JPG)](https://i.publiclab.org/system/images/photos/000/003/311/original/IMG_1046.JPG) [![IMG_1045.JPG](https://i.publiclab.org/system/images/photos/000/003/312/medium/IMG_1045.JPG)](https://i.publiclab.org/system/images/photos/000/003/312/original/IMG_1045.JPG) [![IMG_1048.JPG](https://i.publiclab.org/system/images/photos/000/003/313/medium/IMG_1048.JPG)](https://i.publiclab.org/system/images/photos/000/003/313/original/IMG_1048.JPG) [![IMG_1056.JPG](https://i.publiclab.org/system/images/photos/000/003/314/medium/IMG_1056.JPG)](https://i.publiclab.org/system/images/photos/000/003/314/original/IMG_1056.JPG) ...


Author Comment Last activity Moderation
njmalhq "I don't think browser version is relevant here. This is a standalone android app which no longer runs. In fact every similar software I have fou..." | Read more » about 3 years ago
liz "hi @njmalhq , sorry to hear this isn't going smoothly. What browser are you using? Firefox is the best one to use on the phone because you can spec..." | Read more » about 3 years ago
njmalhq "This software is broken. It won't run. " | Read more » about 3 years ago
warren "Hmm, can you upload a good resolution pic of your device so we can see? " | Read more » over 4 years ago
xose "Wow! I didn't knew this printable. Thanks! " | Read more » over 4 years ago
ananyo2012 "This is really awesome @Karmanya. The spectrum is really good. Using different light sources for the experiment helps in comparing the different sp..." | Read more » almost 6 years ago
warren "Hmm, I actually think DVDs are some of the highest quality gratings available, esp. if alcohol is used to clean the dye off. But you'd have to ask ..." | Read more » over 6 years ago
EvilCartman "Thank you @warren for this great project! I am planning to use its basics to build a similar spectrometer and I want to ask you a few questions: ..." | Read more » over 6 years ago
mathew "wait, shorter answer-- The bandwidth is the same, but the beam will be wider. " | Read more » over 8 years ago
mathew "The laser is a diode + a lens. Unfocused it still goes in a pretty straight line for short distances at least. There are all-in-one surface mount ..." | Read more » over 8 years ago
warren "Huh. do laser diodes have as narrow a bandwidth as a laser? " | Read more » over 8 years ago
mathew "I've been trying to find stand-alone diodes, and it seems that there are several chinese manufacturers of 405nm laser diodes on Alibaba that are qu..." | Read more » over 8 years ago
cfastie "I have a smartphone spectrometer, so maybe bring a cuvette to SNOWFEST and that should be all I need. " | Read more » over 8 years ago
warren "I wanted to work off of the actual models (or prototype models) Mathew and others made, but didn't have time to do a scaled model. Also, figuring o..." | Read more » over 8 years ago
eustatic "cool " | Read more » over 8 years ago
cfastie "Jeff, If you include the dimensions of the part of the spectrometer that inserts into the window, and the dimensions of the cuvettes, the next mock..." | Read more » over 8 years ago
warren "yes! there are CSV, JSON and XML download links on each spectrum page at https://spectralworkbench.org. " | Read more » over 8 years ago
matt "Is the spectral display actually saved. Is there a way to access the spectral data (spectral display) for dropping into Excel or something like th..." | Read more » almost 9 years ago
patcoyle "Looking good. Thanks. " | Read more » almost 9 years ago
nedhorning "Thanks for posting this Jeff. The results are interesting. Most of the LEDs that I've seen have band widths in the 5nm - 10nm range. It's important..." | Read more » about 9 years ago
straylight "wow, good results jeff, as it happens, I'm about to do a similar test on some filters which we use for another experiment. It is rather important t..." | Read more » about 9 years ago
warren "Updated with a picture of it screwed together! " | Read more » about 9 years ago
Suiris "Well done! Knowledge + energy = Dreams come true. " | Read more » about 9 years ago
warren "They will shortly be in the mail to you, Mathew. Thanks! " | Read more » about 9 years ago