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ramanPi - Raman Spectrometer

The open source 3D Printable Raman Spectrometer using a RaspberryPi and easy to find off the shelf components..

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The ORIGINAL open source 3D Printable Raman Spectrometer that uses a raspberryPi, a really bright laser and some parts you can grab from your favorite suppliers..!

BASIC DESIGN GOALS:
1. Make it Open.. Everything.. All of it..
2. Make it 3D Printable.
3. Make it modular and easy to upgrade.
4. Make it as easy to build as possible.
5. Make it easy to customize and open to improvement.
6. Use only commonly available off the shelf components whenever possible.
7. Have a remote interface that will allow it to be controlled and viewed from anywhere.
8. Compare the spectra to the online internet spectral databases.
9. Provide the capability to log data to remote databases, share with friends and colleagues..
10. Not be just another open source spectrometer..
11. Make it easy to use and intuitive.
12. Make it attractive with an elegant design..
13. Make it useful and just cool to have!

Welcome to the hackaday.io project page for the ramanPi! The ramanPi is a raman spectrometer that I decided to build back in April of 2014 because I needed one for another project and could not afford the tens of thousands of dollars a commercial product costs...and there are no DIY or open source systems in existence until now. I knew nothing about spectroscopy, let alone raman spectroscopy back then and everything here documents my learning process towards my goal.....A fully functional, and fairly high resolution raman spectrometer. When I started this project, I had wildly different ideas about how I was going to achieve my goal. The project logs begin very early in my design process and document how I changed my approach and what led to the form it is taking now. In the process of designing this system, and participating in TheHackadayPrize, I have learned a great deal.. Not just about spectroscopy and how raman systems work, but about how important it is to share your work with others..to contribute to the community and help others learn as well. Before I started this project, I had no idea I would later join the contest. I had started to post my project once...then deleted it because I didn't think anyone would be interested. I decided to post it after speaking to a friend who convinced me to go through with it. It wasn't long until Mike S. here at hackaday contacted me to do a Hacker Bio...apparently the first of it's kind on hackaday..! Of course I was interested and very grateful...Mike encouraged me to go further and really convinced me that this is important and sharing benefits everyone.. Boy did I learn how true that is.. In the journey so far, I have learned a tremendous amount, people have been wonderfully supportive and have offered some terrific advice! I want to thank everyone for everything! This is my first project that I've shared publicly, and I have not looked back..It's been one of the greatest experiences I've had the honor of to date.. I am determined to finish this project and make it the best it can be, because everyone has been so supportive and the interest it has generated has made me want to make it better..! Thank you to everyone who has been so great.!!

Be sure to check out the bio that Hackaday.com did on me!!

ST Micro gave me a shoutout on their Facebook page!

The great people over at RaspberryPi.org did a wonderful article on ramanPi!

Some kind words from the folks at 3ders.org too!

Thanks to Elecia and Chris White at embedded.fm for the great podcast interview!

Follow me on twitter too! I'll be tweeting on gitHub updates as well as from here!

Index of Instructions and Informational project logs:

THP Semifinals Video

You can also view the project log with this video that includes a full transcript HERE ...

THP Finals Video

A bench top, raman spectrometer constructed from very easy to source components and 3D parts printable on even entry level printers. My system is a completely unique innovative design in the world of raman spectroscopy and has many advantages beyond the fact it can be constructed for a tiny fraction of the cost of a used commercial system, which can cost tens of thousands of dollars! My system connects to multiple internet databases to retrieve spectral data to identify chemical compounds under test. It is completely scalable to fit almost any budget... Many of the components can be used for other purposes outside this...

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  • 1 × Raspberry Pi Model B+ 512MB RAM $39.95ea Adafruit Product ID: 1914
  • 1 × ARM Nucleo Board STM32F4 STM32F401RE 512K $10.33ea Mouser Part Numer:511-NUCLEO-F401RE
  • 1 × Tosbia TCD1304DG Linear CCD Array Detector $14.99ea eBay
  • 3 × Black Plastic 3D Printer Filament Cartridge (I used an XYZ daVinci v1.0 - 1.75mm 600grams per cartridge) $28.00ea Amazon
  • 1 × Set of ramanPi PCB Kit (3x prototype boards, some solder and a long weekend) $TBD - Probably around $20ea

View all 77 components

  • ramanPi is ON HOLD

    fl@C@03/02/2018 at 02:36 0 comments

    I just wanted to drop an update..                                        Thursday, March 1, 2018

    In case everyone didn't already notice....   My efforts for ramanPi are currently on hold.  =D

    I will be returning to the project once I have completed a number of other milestones in larger project(s).  When I return my efforts toward ramanPi, I will be completely redesigning the optics, electronics and software.  I still have a need for an inexpensive raman spectrometer, so this will happen.  

    If anyone would like to take a leading role in coordinating other developers, etc. in the interim....please let me know and we can talk about how that might work...as there still seems to be a lot of interest int this project..

    Also, I want to take this moment for the people who either haven't read thoroughly through this project, it's logs, etc..  This project is listed as 'work in progress'....meaning it is not a fully functioning raman spectrometer as yet.  Much development is still required.  If you want a completely functional raman spectrometer of this nature,  I'll urge you to contribute to this project!  

    Thanks!

    -fl@C@ 

  • moar of the things

    fl@C@03/10/2017 at 08:08 2 comments

    So, I thought I'd throw a couple of these in for inspiration.... I'm really enjoying Fusion360... Anyone interested in helping with creating these?

    This is the beamSplitterAssembly reborn into a simpler, and easier to print design.. No more of that tiny little carriage for the cube, this one is much more robust and a way simpler design..


  • And...I'm feeling productive..

    fl@C@03/09/2017 at 07:53 0 comments

    And, so the beginnings of the new beam splitter assembly... I'm enjoying fusion 360 so far.. Took me a minute to get the hang of it, but I'm progressing...

    So, again...comments, questions are all welcome!

  • First new part - a new objectiveLensMount!

    fl@C@03/09/2017 at 04:44 0 comments

    Well, here it is...! A new start and a new part... I'll be adding these parts to the gitLab Repo as I finish them.. If you'd like to contribute to the creation, let me know through a DM here! The collaborative features of fusion 360 should make it pretty easy.. As always, questions or comments are welcome!

  • Moving On...

    fl@C@03/08/2017 at 23:23 0 comments

    Ok, the gitlab repository has started ( https://gitlab.com/ramanPi ).. I'm basically giving up on the website for ramanPi.org... I don't have the time to try to keep it from the constant bot attacks or whatever...

    So, this brings me to the next point... I'm going to be starting an updated version of ramanPi in the new gitlab repo. I am interested in everyone's opinion on this, so if you have any.....let me know here...asap!

    The new design will be created in Autodesk Fusion 360. The releases will be housed in the gitlab repo, and collaboration will be through fusion360.. If you'd like to get in on it from the start, now is the time! I have a TON of people who've wanted to join the dev team through this website... I'm going to approve them all... If you are still interested, let me know through a DM here, same goes if you're not interested anymore..

    Optics will be fairly similar, electronics are going to be majorly different (and I am going to take my time this time, not being rushed with a contest)... and hopefully, the whole thing benefits from better design software, more expertise, more experience, more care and time taken, etc...etc..

    Let's get going, finally... I've had a few failed starts...but my plate is clear now...Proof is in the pudding.. =D

  • gitHub vs. gitLab and other exciting news.

    fl@C@10/12/2016 at 01:01 0 comments

    I'm thinking about moving the repo from gitHub...and over to gitLab.. GitLab seems to be a lot better suited to what I'm trying to accomplish.. I'll probably keep gitHub there, and maybe update it with major updates or at certain intervals...but it won't be the repository that gets the regular pushes, etc.. Any questions or comments about that are welcome!

    Also......I am directing some efforts towards a redesign of the electronics in ramanPi... Meaning the four boards (interface, control, imaging, and power boards) will narrowed down to a single board....and that board will have a connector for a raspberryPi zero to sit on... I haven't gone through the specifics of how the zero will connect completely since there's the business with the USB, etc. to deal with in order to get wifi/networking....but the significant cost savings warrants a close look...this redesign is an effort to cut costs and complexity...so.....hopefully that's exciting news..

    ramanPi.org is on it's way back to life, thanks to some help from a generous web developer! Looks like the bot attacks are no longer an issue...now it's just back to business..!

  • MagPi Issue 50 - ramanPi is #7 !

    fl@C@09/30/2016 at 11:13 0 comments

    So, to my amazement...ramanPi is reaching more and more people... this time it looks like the great people over at Raspberry Pi's MagPi magazine included ramanPi in it's "Top 20 RaspberryPi Projects" and the "MagPi Issue 50 - Top 50 Raspberry Projects".. And a while ago they wrote a great bit on ramanPi in their blog..!

    Thanks to them, and everyone for everything..!

  • Update.

    fl@C@05/08/2016 at 17:42 6 comments

    So.. I figured I'd consolidate the last few logs into this one to make it easier to follow what's going on...

    Hackers.. I moved ramanPi.org over to a new host...and it's helped with reliability... But it hasn't stopped the 1,004 malicious login attempts and constant bot traffic trying to overwhelm the site.. I don't have the resources, time or whatever to spend on mitigating the constant attacks...

    Soo..... Basically, as a result.. I can't seem to recover anyone's email addresses, etc. If you were interested in developing, or were participating... Contact me here, I know a lot of people have..and I'm trying to keep up.. I'll get to you soon! But I'm thinking of just forming the 'team' here at hackaday.io to make life easier. It's not as organized, and a little restrictive...but it's here.

    So, hopefully some of you see this..and so on... Here's to picking up where we left off... :D I'll try to update here with what I can..

  • ramanPi and 3D Printing for the Citizen Scientist @localMotors

    fl@C@05/08/2015 at 15:26 0 comments

    Hey, short notice... But if you're going to be in the Phoenix area the week of the 14th, I will be in town at Local Motors to talk about ramanPi and 3D Printing for the Citizen Scientist..!

    Hopefully I can put up a video of the talk after if you missed out and are still interested!

    PM me if you're interested in more details!

  • Developer Developments

    fl@C@04/28/2015 at 23:04 0 comments

    So, it's been a great past couple weeks! I have had some really talented and incredibly smart people contact me and offer their help to contribute to ramanPi..!! I'm very excited about where this is going and I think by the end of it, we will have a very good system.

    We have a couple Python gurus, one of which has both PyQt4 and signal processing experience as well as being an electrical engineer with FPGA skills. Another being skilled with the various libraries we'll be using in addition to a multitude of programming languages and has a Masters in Physics. There's a couple people who have some in depth knowledge and experience with optics and lasers as well as raman systems, both in usage and design.. Another who is very skilled with FPGA design and will make the difference for the imagingBoard.. All of these people are being very gracious in offering their time, experience, knowledge and skills to work together to bring ramanPi to the next level and make it a system that can be used for serious science in the school, in the lab or at home!

    I'd really like to take a moment and thank everyone for all of this.. It's going to be very exciting!

    If you're interested in contributing as well, you can contact me at dev@ramanPi.org!

View all 88 project logs

  • 1
    Step 1

    Below is a list of build instruction logs that will instruct you on how to go all the way from sourcing your components to printing the parts, and constructing your very own raman spectrometer!

    To begin, you will need some tools..  Pretty much every section requires similar tools.  If a section requires a special tool not listed here, it will state that and show you which tool is appropriate.

    Tools Required:

    • 1. Needle Nosed Pliers
    • 2. 1.5mm Hex Driver
    • 3. 5/16 Hex Driver
    • 4. Philips Screw Driver
    • 5. Precision Tweezers
    • 6. Nitrile Gloves
    • 7. Cotton Gloves
    • 8. KimTech KimWipes

    3D Printed Part Guidelines:

    Printing the 3D Printable parts will take you probably about a week. The spectrometer portion alone took about 15 hours on my XYZ daVinci 1.0 printer.. The 5.25" Drive tray takes about 10, and most of the other parts are about 6 or 8 hours.. Print in high enough quality to make sure the parts end up solid enough that they won't crumble in your hands..use 30-50% density... Supports are a good idea and the spectrometer really should be printed with the inside facing the floor. I managed well with .2mm height, you might want to try .1 or whichever is best for your printer. All the parts have been designed for use with ABS plastic and I would recommend using black ABS filament.  For parts with beam paths, I am investigating different ways to coat the interior for reduction in reflections, etc. For now, if you like you can coat them with a flat black paint..this will help keep the noise floor down.

    All of the 3D Printable objects are located in the gitHub repository.  They have been created with openSCAD and can be modified, etc.  You can view the .STL files and you can download and edit / modify the .SCAD files as well.  

    Sections You Will Be Building and Configuring:

    Following Instructions:

    Each section of the raman spectrometer system is divided into separate build logs to make it easier to find a section and keep the flow.  You'll see each section has a "LET'S BUILD IT" graphic..

    You can click on that and it will take you to the appropriate instructional build log associated with that section!  At the end of the instructional build log, there will be a link to return here...or you can just close the tab and this tab should be here waiting!

  • 2
    Step 2

    Section: 1

    A Completed objectiveLens Mount

    Components Required:

    Click on the graphic above to open a new tab with instructions on how to build your objectiveLens Mount!

  • 3
    Step 3

    Section: 2

    A completed beamSplitter Assembly

    Components Required:

    Click on the graphic above to open a new tab with instructions on how to build your beamSplitter Assembly!

View all 13 instructions

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Discussions

braniti wrote 03/16/2015 at 04:58 point

  Wonderfull  project . 

   Last year I run across old   sci.article: http://www.researchgate.net/publication/227816958_Urine_analysis_by_laser_Raman_spectroscopy

showing how Raman  can measure   molecule  in Urine (for my wife health needs) ...  crazy tech ...  then searching for DIY  Raman I run on your project at forum where people are thinkering how to build one cheap  : 

http://www.sciencemadness.org/talk/viewthread.php?tid=23422&page=4

They mentioned your great project but someone stated that  you didn't provide  measurments  of some  compund  spectra.

so few questions :
1)  Can you please give feedback on their comment ?
2) I assume you compared it to some    commercial  device ... If yes , can you give some information?
3) Do you consider adding option for  Surface-enhanced_Raman_spectroscopy, might be needed  for my needs ? 

  If i can measure some molecules  in urine   I will  make  time  for the replication this summer assuming that the parts price is  roughly  600-1000$  ( as you said in the

http://publiclab.org/notes/flatCat/08-29-2014/ramanpi-the-3d-printable-raspberry-pi-raman-spectrometer  ...  lucikly 

3Dprinter  and hackerspace is in the neighbourhood )

 Btw today  I was at ki-cad workshop  ( at local hackerspace)  and there i heard about cheeper alternatives to OSHPark,  presentor was very happy with quality  of :  SeedStudio , Hackvana PCB ,  Smart protoyping, Dirt Cheap Dirty Boards   (free shipping, 15$ for  10 pcbs  )

All the best ,

p.s.   "24hours is never enough"  totaly with you on this one .

  Are you sure? yes | no

fl@C@ wrote 03/19/2015 at 23:32 point

Hi..  I haven't seen the discussion on sciencemadness... I should start by saying, ramanPi is still under development.  I started the project in late last year...  It's quite an undertaking for one person :)  So, a lot of progress has been made...but there is work to still be done.

I am in the process of trying to get as many developers together as possibly to help bring everything together.. I'm working on getting a FAQ and list of work to be done on ramanPi.org so people can see what needs to be done still and where they can contribute...  

So, to answer the questions...

1- Assuming the comment is regarding that I didn't provide measurements of any compounds, etc..  Long story short as to what has been the limiting factor.... CCD integration times due to processor limitations. The stm32f401re I chose originally for the imagingBoard doesn't have quite enough power to pull off what I needed..  I tried many approaches and nothing quite did it.. That is changing very, very soon..  Without writing a book here, I decided to go with FPGA for the imagingBoard..  This will accomplish two things..It will make the spectrometer portion more capable of the longer integration times, and will allow for extra signal processing, etc... And the major other benefit will be that it will allow the spectrometer to fulfill my original goal of making it work as a completely independent spectrometer outside the raman system if someone wanted just a spectrometer.. It will be fully compatible with the Ocean Optics USB4000..  What this means is that the end goal of obtaining actual raman spectra is almost here.  There's a lot of posts in the link you gave, but I hope this helps.. If not, let me know and I can clarify... :)

2- I have no access to any commercial systems (which is why I built ramanPi) =) But I am working with a couple people who do have access, and hopefully will be able to provide something there soon as well.. What I can say is that the resolution will be relatively comparable. (depending on the options one chooses to build)

3- I currently have no plans for adding options on surface enhanced raman spectroscopy..  Possibly in the future, but for now... I will focus on completing the base system.. :)  Having said that, there are a number of options I have planned for the future, so this may become one as well.. but if I recall about surface enhanced, it might be a little tough to implement on a DIY level...

It is my goal to bring the kits and parts to where someone can build a system for the $600-$1000 range...depending on options, etc...

Hope this helps!

  Are you sure? yes | no

A. M. Aitken wrote 03/24/2015 at 20:59 point

"CCD integration times due to processor limitations. The stm32f401re I chose originally for the imagingBoard doesn't have quite enough power to pull off what I needed.."

I don't understand this.

  Are you sure? yes | no

fl@C@ wrote 03/24/2015 at 22:08 point

HI Marvin..  I was driving the CCD clocks straight from the MCU.. I started with PWM, which I couldn't get to go more than about 500kHz.. tried using busout which was worse.  If I'm missing something, I'd love to hear it.. :)  I didn't add external hardware to drive the clocks mainly due to time constraints..  The FPGA redesign is already underway, thanks to some kind help.. 

  Are you sure? yes | no

A. M. Aitken wrote 03/24/2015 at 23:25 point

You can toggle a GPIO pin every 2 clock cycles with the ST20F4 series so a (say) 1MHz read out even with math on the fly ought to be trivial on an 80MHz part.  Clocks up to 5MHz should be fine but much faster will start to smear the CCD and I'm not sure any application would benifit from the few ms savings in readout.  For integration, you should be reading out as few times as possible from the CCD until a bit below saturation.  For a Raman signal into the Toshiba CCD this could be 30secs while the MCU has no driving to do.  A slower chip could read into RAM and then compute the integration sums afterward but in this case you are probably ADC limited, 400ish ns if using the internal unit.  I've not looked at your design in some time, am I missing a part of your thought process?

  Are you sure? yes | no

A. M. Aitken wrote 03/25/2015 at 00:57 point

I mean STM32F4 series of course, doh!

  Are you sure? yes | no

fl@C@ wrote 03/25/2015 at 07:51 point

Marvin, sorry.. I think my memory failed..I think the PWM would actually allow around 1MHz..which I agree is still nowhere near what you'd think you could get. Correct me if I'm wrong but I believe it to be a limitation of the mBed libraries.. There is a 'FastPWM' library but if I recall it didn't support the F401 at that time.  I tried several variations including using the 'busout' function but the timing was worse..   I have had success reading from the CCD, but the trouble was reading the ADC while trying to maintain the master clock.. The documentation for the 1304 isn't great, but my understanding was that you need to drive the master clock during integration? while in the 'electric shutter' mode you read one pixel per four cycles..and in the normal mode SH stays low during integration but the master clock keeps going....?  When I mentioned the trouble with integration times due to processor limitations, I was able to readout using both the busout and PWM methods running at around 500kHz using the firmware that is in the gitHub...which uses the 'electric shutter' in a FSM .. It was when I tried moving to the normal mode and lengthening the SH period I ran into the problems..

I have read the ADC in the F401 is quite fast..and I do store the values.. I tried using the CMSIS RTOS library to see if that would help to read the ADC while driving the clock..but it was actually worse.  I haven't worked with any of the STMicro tools, which is probably the best way to go when trying this kind of stuff.. but in the way things have come out, the FPGA seemed like a much better way to go.....the desire to make the spectrometer a device that can be used on it's own, outside the raman system if people want to build just that...and be compatible with the ocean optics usb4000...doing a continuous acquisition while streaming the data compressed through the usb serial interface and the other various functions...it seemed that trying to make the F401 do all of that was too much to ask without spending a lot of extra time trying to be clever with coding..  With the efforts ramping up in development, and people starting to contribute...the FPGA looks like it's solving all of these problems..and hopefully won't add any addition cost..

I am more than open to any ideas you might have..or any info regarding the CCD.. :)

  Are you sure? yes | no

vazquez wrote 02/13/2017 at 13:44 point

fl@C@ the Ocean Optics HR2000 uses a Xilinx XCR3128XL CPLD to drive the CCD , a LTC1415 ADC and a Cypress EZ-USB controller. Have you considered using PL chips instead MCU at the CCD data acquisition level? 

  Are you sure? yes | no

schiaucu wrote 02/02/2015 at 16:55 point

Hey, this is a fantastic job! When you will be decided to sell some kits, let me know, I want to buy one.

  Are you sure? yes | no

fl@C@ wrote 02/06/2015 at 05:17 point

Hi..!! Will do..! They're in the works.. Hopefully in the following few months I will have some significant updates in that direction...!

Thanks!!

  Are you sure? yes | no

leelsuc wrote 01/29/2015 at 19:07 point

I got a lot notes on how to calculate the spectrograph. I got many free articles from archive.org, very good website.

  Are you sure? yes | no

leelsuc wrote 01/24/2015 at 20:51 point

Hey Fl@c@. THANK YOU SO MUCH for doing this great work.

one question, could you post the books or notes to calculate the czerny turner spectrometer? I 've been looking for a long time... thanks, or any online source or formula you can share with us?

  Are you sure? yes | no

FrankenPC wrote 01/11/2015 at 00:05 point

Hey Fl@c@. THANK YOU SO MUCH for doing this complete build log. This is genius.

So, I WANT to build one really bad. I'm in need of this kind of technology right now and I have the money for the parts. I don't currently have a 3D printer though.

SO a couple of questions for you! There are 3D printer on demand sites on the web I'm sure. Do you recommend any? Never hunted for a service before. And you mention the PCB kits. You have any plans to sell them in the near future or should I just outsource some vendor who does Eagle? Can you recommend any prototype manufacturers?

Finally, your Eagle files are up to date? No dead bug mistakes or anything?

  Are you sure? yes | no

fl@C@ wrote 01/11/2015 at 10:06 point

Hey FrankenPC.... So, thank you..! I am in the process of gearing up to offer kits.. I am planning on offering full kits, or parts.. I am also looking into offering either plastic parts (will probably be molded, or possible HDPE machined, etc..) and also aluminum parts.. The PCBs are current, but I will be updating them in the near future with more options... and I will be offering those as well. If you need something very soon, I've used OSHPark but they seem pricey to me..but the boards come out very nice. I don't know of any 3D Printer on demand sites...but I have seen a couple in shopping malls lately.. If you're not in a terrible rush, I am working very hard to get the site up and things in line to offer them... =)

  Are you sure? yes | no

jgm.requel wrote 01/20/2015 at 19:43 point

Well you can count me as a purchaser when you do!
-James

  Are you sure? yes | no

eichlerdr wrote 12/27/2014 at 01:53 point

I am a chemistry student at UIC and I have been working on some independent studies with spectroscopy, and I must say this is absolutely amazing. I was thinking of doing a basic visible light spectroscopy device with the raspberry pie, but now that I have seen this I may have found a new project to play around with. Please keep up the innovation!

  Are you sure? yes | no

fl@C@ wrote 01/07/2015 at 07:36 point

Hi eichlerdr, thank you..! Maybe start out with just the spectrometer portion! Keep my updated on your build!

  Are you sure? yes | no

bootdsc wrote 12/09/2014 at 20:58 point
This is the single most complicated and impressive build to ever cross HaD, how it ended up in 5th place is some kind of conspiracy. Beat out by a handheld spectrum analyzer, really? Come on i can go on amazon and buy one so who cares. I hope you bring this to kickstarter and have lots of success.

  Are you sure? yes | no

fl@C@ wrote 01/07/2015 at 07:34 point

Hi bootdsc..! Hey, thank you.. I am just glad to have been a part of the whole thing, there were a lot of great projects.. I hope I can get to that point soon!

  Are you sure? yes | no

admin wrote 11/30/2014 at 05:05 point
I would just like to congratulate you with regards to your project, i have no previous knowledge of Raman or much else, but you have sparked my interest and i have been studying like no tomorrow, i have started to order parts and i am going to build it.
i will have of course lots of questions and hope you don't mind me asking (don't want to be a pain)
again congrats
David

  Are you sure? yes | no

fl@C@ wrote 12/04/2014 at 04:11 point
I'm always open for discussion! Thanks for the interest and I wish you the best of luck..! Keep an eye out, I will be doing some possible design updates in the next few weeks.. I will do my best to keep the component list the same though :)

  Are you sure? yes | no

gabriel.goetten wrote 11/27/2014 at 13:28 point
Hey man! Your project is freaking amazing! However, the signal seems too weak right? Maybe it is because the intensity of the laser... Anyway, are you planning to sell this as a full ramanpi where we can buy it fully? Because it seems very good =D

  Are you sure? yes | no

fl@C@ wrote 12/04/2014 at 04:09 point
Thanks.. If the signal you're referring to is indicated in the posting titled 'Raman' ... I should probably have spent more time on that post.. It's probably misleading in that I think it indicates my attempt of obtaining a raman signal over testing the RTOS implementation of the imagingBoard firmware.. Where I say that the raman signal is incredibly weak is reference to the fact that raman signals are incredibly weak in contrast to the rayleigh light in return... I was sleep deprived and generally worn down by the contest deadlines...... A week or two more and I will be back on track and clearing up my intentions with this device....which will in fact probably include a kit and possibly pre-built version for sale.. I have had a lot of inquiries regarding that, so here is hoping!
Thanks again.. I'd like to hear your opinion or anyone else's if you/they have any requests for functions or features...!

  Are you sure? yes | no

Neil Jansen wrote 11/13/2014 at 22:09 point
This just once again proves the judges weren't doing their jobs. Very sorry you didn't win first place, and I'm sorry that they thought a sensor breakout board and some pcv pipe antennas were cooler than your project. You deserved to win, your work and dedication towards this project has been amazing.

  Are you sure? yes | no

Christian Lerche wrote 11/15/2014 at 08:18 point
I disagree with you on that point Neil, the judges did what they were asked to do. You and I as well, have different opinions on who should win the prize, but you can't say the judges didn't do their jobs.

  Are you sure? yes | no

fl@C@ wrote 12/04/2014 at 04:14 point
Thanks for the kind words Neil..! I'm just happy that I was a part of the whole thing.. I never even expected to make the final 5.. I totally thought you'd beat me there..! I'm very sorry btw...I love your project and will definitely be building/buying one..!

  Are you sure? yes | no

airbuckles wrote 11/12/2014 at 17:56 point
THIS IS AWESOME!!!

  Are you sure? yes | no

matt wrote 11/11/2014 at 06:23 point
So far how much success have you had in identifying compounds using this instrument? I understand that you are still working on the software. Can you post some example spectra with a database spectra to show how your results compare?

  Are you sure? yes | no

fl@C@ wrote 12/04/2014 at 04:12 point
I'll be re-writing the firmware for the imagingBoard in the next few weeks.. expect lots of updates from that..!

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Dmitri wrote 10/29/2014 at 11:15 point
Love this project!
A couple questions:
1. Why did you decide to go with crossed Czerny-Turner configuration? Aberration corrected concave holographic gratings clearly offer some advantages. Was the price point too prohibitive?
2. Why not do away with just one edge filter? You probably don't care about anti-Stokes scattering. Removing 522nm Short Pass Filter would simplify the design.

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fl@C@ wrote 10/29/2014 at 21:19 point
Hi, thanks Dmitri...
Yes, number one is about cost.. The concave holographic grating was considerably more expensive.. It might be something I consider later though..
I actually do want information on the anti-stokes as much as stokes in my other project.. The beauty is that if people aren't interested in the cost or complexity, an adapter can be made to replace the filter selector assembly..!

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vazquez wrote 03/08/2016 at 01:11 point

The filters are not symmetrical around 532. The short WL filter cuts up to 360 cm-1 from the laser line, this is good. The Stokes filter, otoh, cuts up to 615 cm-1, this limits the "good" side (most intense) of the scattering to higher vibrational frequencies only. Did you consider using a second gratting instead of filters to remove the laser exciting line?

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Jrsphoto wrote 10/29/2014 at 05:00 point
Congrats fl@C@ Glad to see you made it to the final 5!

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fl@C@ wrote 10/29/2014 at 21:20 point
Thanks!! I'm still looking at those libraries when I get around to the version for the raspi camera!

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radiusmike wrote 10/25/2014 at 04:10 point
Superb. This is most impressive. You have my vote for Best in Class and the Hackaday Prize. Wow!

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fl@C@ wrote 10/29/2014 at 21:21 point
Thank you..! I'm happy people like it!

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carrigan90 wrote 10/18/2014 at 20:37 point
Awesome!

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fl@C@ wrote 10/29/2014 at 21:22 point
Thanks!

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WestInSide wrote 10/15/2014 at 08:15 point
Nice!!!! Congrats!

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fl@C@ wrote 10/15/2014 at 19:47 point
Thank you!

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spacedoudou wrote 10/14/2014 at 12:08 point
you're in the top 5 !!! congrats !!

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fl@C@ wrote 10/15/2014 at 19:46 point
Hey thanks spacedoudou! =D Lots to do now..!

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David wrote 10/13/2014 at 18:15 point
Well Done!

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fl@C@ wrote 10/13/2014 at 19:59 point
Thank you! =D
I look forward to seeing your PCR machine...! I would like to build one myself... Hopefully I can see it in Munich!

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David wrote 10/14/2014 at 12:22 point
Sure, no worries. If I get some PCB's made up by then, you can have one :)

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Kojote wrote 10/15/2014 at 09:22 point
Make Munich too?

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fl@C@ wrote 10/15/2014 at 19:44 point
Thanks David! :)
I want to get a group of instruments like yours, the pyppm and mine and whatever else can be found together to make a nice suite of lab gear.. maybe share a protocol and be able to integrate data.. An openLab suite so to speak..

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fl@C@ wrote 10/13/2014 at 20:00 point
Thank you!

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