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 » over 2 years ago
JSummers "Hi Doug, I would be happy to help you. Here is the status of the potentiostat project: Our original design was limited to outputting +/- 1.65 volts..." | Read more » over 2 years ago
JSummers "I have been thinking about developing a spectrometer to record such spectra. What is your time frame to get this done? What resolution are you in..." | Read more » about 3 years 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 » over 3 years ago
JSummers "Hi @giannispimenidis, Sorry to hear that you are having difficulties. The voltammagram does look odd. To start off, try putting a resistor (10K t..." | Read more » almost 4 years ago
JSummers "Hi jfalquet, I dont have experience with this but it looks like getting out to 13 microns is neither easy nor cheap. Here are some options for a d..." | Read more » about 4 years ago
JSummers "Hi @super_smartaga, Your question will get better answers if you can answer some initial questions. What do you consider cheap? What wavelength ra..." | Read more » over 4 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 » over 4 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 4 years ago
JSummers " You could get a local lab to test for metals using atomic absorption or atomic emission. You would have to look up the best technique for the met..." | Read more » almost 5 years ago
JSummers " Getting the solar spectrum was a good idea. Clearly, the lines in this are not due to the light source and must be attributed to the detector. O..." | Read more » almost 5 years ago
JSummers "You may be able to do this using the GPS on your phone with an app like Strava. I think the Z direction accuracy of GPS is not as good as the XY a..." | Read more » almost 5 years ago
JSummers " I think what you want will be called a barometer. It is what drones use to measure altitude. They are not super expensive, here is one for $6.70..." | Read more » almost 5 years ago
JSummers "How would this differ from wiki pages? Seems to me that the difficulty with wiki pages is keeping them up to date. That appears to be the problem ..." | Read more » almost 5 years ago
JSummers " @oskarbob, the drivers must be downloaded from texas instruments. You can get them from http://www.ti.com/tool/STELLARIS_ICDI_DRIVERS. Instructi..." | Read more » almost 5 years ago
JSummers "Lehninger, Principles of Biochemistry, Fourth Edition, David L. Nelson and Michael, M. Cox. WHFreeman & Co, NY. Chapter 6, Sections 6.3 (Enzyme..." | Read more » about 5 years ago
JSummers " Hi Ag8n, Thanks for your interest. No, we are not headed toward chromatography although the flow cell & spectrometer are pretty well set up fo..." | Read more » about 5 years ago
JSummers " Hi Ag8n, Thanks for the comment. I am glad you are interested. We just connected the VBAT pin to the +3.3 volt bus. You did not miss any descrip..." | Read more » about 5 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 » almost 6 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 » almost 6 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 » almost 6 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 » almost 6 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 » almost 6 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 » about 6 years ago