Comments

Author Comment Last activity Moderation
JSummers "Hi Esben, Thanks for the comment, and thank you for your early work on the TCD1304. That was instrumental in us getting this project as far as we ..." | Read more » about 1 year ago
JSummers "sure, you can do it. Of course the diffraction angle will be different. It looks like the dvd has 1300 lines per mm and the grating has 1000 so t..." | Read more » about 2 years ago
JSummers "Hi Wln213, Interesting project. First thing, when you do technical writing like this, please describe the figures in greater detail. The main figu..." | Read more » about 3 years ago
JSummers "I believe the yellow color you see when burning wood or paper is the atomic emission from sodium ions in the material. It is the same color you se..." | Read more » over 3 years ago
JSummers "Hi @iresal, The correct integration time is the 15 ms time. I think that is the minimum time to read the data from the output pin. The 4 ms value ..." | Read more » over 4 years ago
JSummers "Hi @iresal, you are correct about the clock roll value being related to the integration time. As the code is written, the integration time equals ..." | Read more » over 4 years ago
JSummers "You can get gratings from places like Thor Labs or Edmond Optics. For a uv lamp, I would look at Thor labs or spectrometer vendors like Ocean Opti..." | Read more » over 4 years ago
JSummers "Hi @ONECore and @hmx, I just posted a research note on this topic. it is here: https://publiclab.org/notes/JSummers/06-03-2018/updating-the-wheet..." | Read more » over 4 years ago
JSummers "Anyone interested in this project? I am working on code to use the Toshiba TCD1304 ccd in this project. I hope to have this to a point where I c..." | Read more » over 4 years ago
JSummers "Nice project. This spectrometer could fit into an open-source chemical kinetics project I am working on. If you would be interested in collaborati..." | Read more » over 4 years ago
JSummers "Building a spectrometer is a fine university project, but this will not work for detecting fentanyl. Fentanyl does not absorb in the range where t..." | Read more » almost 5 years ago
JSummers "Hi @TUtam, I am not entirely up on this project but am somewhat familiar with Processing and am wiling to help. I downloaded the WheeTrometer GUI ..." | Read more » over 6 years ago
JSummers "Neat idea, but ... Perhaps I dont understand what you are trying to do, but getting a spectrum is measuring multiple wavelengths of light and laser..." | Read more » almost 7 years ago
JSummers "How does the file look? You should be able to open it with excel or notepad. It looks to me like it should have one row of headings followed by h..." | Read more » over 7 years ago
JSummers "Hi Abaker, You don't really run the Energia programs. What you do is load them onto the microcontroller and they will be active for as long as th..." | Read more » over 7 years ago
JSummers "I think that small commercial spectrometers typically use a collimating lens to get light coming through the slit parallel prior to going through t..." | Read more » about 8 years ago
JSummers "It sounds like the cuvettes absorb some oils (not quite the same as melting, but bad none the less). Plastic cuvettes are made for use with aqueou..." | Read more » about 8 years ago
JSummers "I hate to say it, but it looks like your laser peak at 499 nm looks like it was truncated, meaning that your fluorescence intensity is 25% of what ..." | Read more » about 8 years ago
JSummers "Very nice. I suspect that the limitation on accessible wavelengths is due to UV due to absorbance by the plastic optics and will not be improved by..." | Read more » over 8 years ago