| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| warren | "@stevie did you see this note now that Henry's added images? Pretty neat, and perhaps one of the only posts I've seen of the oil testing kit in the..." | Read more » | over 10 years ago | |||
| warren | "Also can you share any of the spectra you did get? Links? Thanks! " | Read more » | over 10 years ago | |||
| warren | "Wow the photos are amazing. Was there a reason you mostly used the green? A blue laser will excite a broader range of colors, since light can only ..." | Read more » | over 10 years ago | |||
| warren | "Cool yes I forgot about that dusjagr! Sketch of audio powered LED: " | Read more » | over 10 years ago | |||
| dusjagr | "btw... we have continued a lot... see what urs made: http://hackteria.org/wiki/DIY_NanoDrop m " | Read more » | over 10 years ago | |||
| warren | "Another thought. To avoid needing batteries for the LEDs, I wonder if we could power them off the headphone jack of a phone... Like this laser acce..." | Read more » | over 10 years ago | |||
| warren | "Well I like the angle in part because it seems convenient for viewing on a table or countertop... Almost like a lectern. And we can adhere a phone ..." | Read more » | over 10 years ago | |||
| amysoyka | "I was thinking about this very issue today. It just doesn't make sense to hold the phone at an angle though - how can we rearrange this idea so tha..." | Read more » | over 10 years ago | |||
| stevie | "Awesome Scott! Thanks for posting. What about what we found with the Spec? I could post a follow up note on some of the issues we ran into there, o..." | Read more » | over 10 years ago | |||
| eustatic | " " | Read more » | over 10 years ago | |||
| eustatic | "https://farm6.staticflickr.com/5233/14324445688_189d7e59a6_h.jpg I guess it is fluorescing! " | Read more » | over 10 years ago | |||
| warren | "I think the 405 nm ones may be enough -- this looks like fluorescence just like crude oil, so we'd only be measuring >400nm light anyways. The i..." | Read more » | over 10 years ago | |||
| warren | "Also why does the laser show more in the coal dust vial? Are you sure it isn't fluorescing? Could you take a clearer photo? " | Read more » | over 10 years ago | |||
| warren | "Wow, great work. For Grand Isle Coffee 10x (the one where the laser doesn't go all the way through), it looks like you could dilute it further. Or ..." | Read more » | over 10 years ago | |||
| mathew | "we can source UV lights in the 370nm band-- they're expensive, but not THAT expensive. we might also be able to get some free samples from a manufa..." | Read more » | over 10 years ago | |||
| warren | "Hi, Henry - what is your fluophore? Did you purchase the alpha oil testing kit with the blue/uv laser pen? I've been able to line up the desktop ..." | Read more » | over 10 years ago | |||
| ferguspitt | "Hi Josh, I'm doing some research on public labs' use of spectrometers, and I was wondering if you could confirm a few details for me? ferguspitt@co..." | Read more » | over 10 years ago | |||
| warren | "Tip on 405nm UV LED which then has wide-band RGB phosphors for visible light: http://www.open-photonics.com/featured-technologies/high-cri-leds " | Read more » | almost 11 years ago | |||
| warren | "Just posted a series of steps in great photos here: http://publiclab.org/wiki/oil-testing-kit " | Read more » | almost 11 years ago | |||
| warren | "Adding this to the comments of the post too, but i also recommend: cotton swabs bring rubber gloves and plenty of mineral oil! and extra AAA batt..." | Read more » | almost 11 years ago | |||
| liz | "Sure! we are just starting out with cataloging common oils, so i think a broad selection would be good. We also know that the more complicated the ..." | Read more » | almost 11 years ago | |||
| jholmes5 | "Looking forward to it! Would thread cutting oil be good? I think it has some extra sulfur in it. Jay " | Read more » | almost 11 years ago | |||
| warren | "Alpha oil testing kits now available! http://store.publiclab.org/products/spectrometry-sampling-kit " | Read more » | almost 11 years ago | |||
| mathew | "For everyone who wanted a sampling kit, the parts for 20 have arrived. e-mail us and we'll share a private purchase link kits@publiclab.org " | Read more » | almost 11 years ago |