| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| Ag8n | " I like the idea. But why are you selecting ftir? " | Read more » | almost 6 years ago | |||
| Ag8n | "Please look at the data sheet for the purple air sensors. Specifically, the r2 data for the pm1.0, pm2.5, and pm 10. At least in the medical fiel..." | Read more » | almost 6 years ago | |||
| warren | "I agree, i think it's laser scatter -- you can read @guolivar's post here for a bit more! https://publiclab.org/notes/guolivar/01-08-2018/thoughts-..." | Read more » | almost 6 years ago | |||
| warren | "Hi! I had to look up "adsorb" -- (it means accumulating on the surface rather than interior) but that makes sense -- basically @guolivar, you're sa..." | Read more » | almost 6 years ago | |||
| Ag8n | "Another good way to quantitate sugars is with a refractometer. They are pretty cheap and often used in wineries. " | Read more » | about 6 years ago | |||
| david_uwi | "Both glucose and sucrose solutions are colourless so visible light is not going to work. A homemade spectrometer will not go very far into the UV ,..." | Read more » | about 6 years ago | |||
| kokoz | "I think the sucrose is in different wavelenghts? in human body sucrose is broken down in to glucose.. " | Read more » | about 6 years ago | |||
| warren | "I don't know about glucose, but this post notes how to detect sugar (sucrose, i guess?) in wine: https://publiclab.org/notes/ygzstc/07-23-2014/dete..." | Read more » | about 6 years ago | |||
| Ag8n | "The purple air monitors have a low r2 value for the pm10 testing. This may lead to the skewing that you are talking about. I corresponded with th..." | Read more » | about 6 years ago | |||
| guolivar | "Following on @jeffalk answer, please expand on your question. In my opinion (and I've worked in aerosol science for a number of years) the main poi..." | Read more » | about 6 years ago | |||
| guolivar | "As far as I know Plantower hasn't disclosed that (to be fair, I don't think any of the low-cost manufacturers has done either). From the field test..." | Read more » | about 6 years ago | |||
| jeffalk | "Hi. Given that you mention "silica" and you are at UW Eau Claire ( western wisconsin sand mining...) I take your question to really ask whether on..." | Read more » | about 6 years ago | |||
| jeffalk | "I could be wrong but I do not believe optical particle counters use spectroscopy as the method is usually described. At any rate a number of years..." | Read more » | about 6 years ago | |||
| esbenrossel | "Nice work. Can you do a spectrum of a low pressure sodium lamp? If you can, or cannot, resolve the doublet at 589nm you will have a better idea how..." | Read more » | about 6 years ago | |||
| Ag8n | "Nice sharp lines on the neon spectrum! Good job! " | Read more » | about 6 years ago | |||
| homechemist | "Hi there @Bronwen , yes you can contact me at my email (shown at the end of the PDF file) and I should be able to send you the 3D models in a few d..." | Read more » | about 6 years ago | |||
| Bronwen | "This is fantastic! Are the 3d files available somewhere? I'd love to try to modify this (or build an adapter) for another camera to try to replicat..." | Read more » | about 6 years ago | |||
| farah | "how to make a kite for child? http://www.ju.edu.jo/ UJ " | Read more » | over 6 years ago | |||
| esbenrossel | "In case you guys haven't already seen, Reim over at pjrc has written a driver for teensy using the arduino IDE: https://forum.pjrc.com/threads/5256..." | Read more » | over 6 years ago | |||
| iresal | "Hi @JSummers, you are correct, I am pulsing the pins to these intervals,for the phi M I used other timer to generate the 1.4 Mhz signal (the 350 wa..." | Read more » | over 6 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 6 years ago | |||
| iresal | "Dear @JSummers, thank for the reply. I assume you mean 3964 (instead of 4964) elements, and the 15 ms came from 4us (four times the clock ticks) x ..." | Read more » | over 6 years ago | |||
| esbenrossel | "Thank you for the mention :) I should point out that I'm not FlatCat/Fl@C@ nor do I have anything to do with the RamanPi-project. " | Read more » | over 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 » | over 6 years ago |