| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| amir129 | "Thank you! I'll try to make one and will post the progress. " | Read more » | almost 7 years ago | |||
| stoft | "You could buy a webcam from Amazon, use a spare DVD some razor blades, black paper, double-stick tape and build one for about $50 (most of the expe..." | Read more » | almost 7 years ago | |||
| amir129 | "Thank you very much for such details explanation. I never thought about getting the reference to compare with the result. That is a good idea. Sin..." | Read more » | almost 7 years ago | |||
| Ag8n | "Thank you for the question. To answer this, you will have to go where no man has gone before. There are a number of concerns. For example, cdom..." | Read more » | almost 7 years ago | |||
| stoft | "Without a "reference standard" the measurements will all be relative; not absolute (like ppm [parts per mission]). So, the relative concentration w..." | Read more » | almost 7 years ago | |||
| amir129 | "Thanks for your reply. I am trying to measure the percent transmission of light as a measure of pigment concentration in the water. So if i captur..." | Read more » | almost 7 years ago | |||
| stoft | "The posted graphs are, mostly, just individual experimental plots. Assuming 1) working spectrometer, 2) has been wavelength-calibrated using a CFL ..." | Read more » | almost 7 years ago | |||
| warren | "@liz shared this great resource, re: the discussion below of a "style guide" or "design modules" -- https://lawsofux.com/ " | Read more » | almost 7 years ago | |||
| warren | "Just noting that @csik has had trouble with some of these types of cameras recently: I chocked it up to not being familiar with the cameras but fo..." | Read more » | almost 7 years ago | |||
| warren | "Also noting this as a reference (though it's for print!) http://publiclab.org/style-guide " | Read more » | almost 7 years ago | |||
| warren | "Our discussion covered a lot of topics! @liz @stevie this is great stuff for planning out how we'll engage design contributions. Tommy How do we ..." | Read more » | almost 7 years ago | |||
| kgradow1 | "The cost of all of them actually vary a lot. We took a 40x apart at the barnraising and realized it only has two lenses inside of it, which seemed..." | Read more » | almost 7 years ago | |||
| stevie | "hmm maybe we could get 1 or 2 10xes. Any idea why the cost on the 10x ones here vary so much? http://www.amscope.com/accessories/objective.html?i_m..." | Read more » | almost 7 years ago | |||
| Bronwen | "I think you have to aim to be in a well ventilated area for pads too: pouring acetone might not be too terrible depending on what kinds of bottles ..." | Read more » | almost 7 years ago | |||
| kgradow1 | "I'd love to work through a build at 4x or 10x, which should a much simpler in terms of onboarding and just learning how to use the scope. At those..." | Read more » | almost 7 years ago | |||
| stevie | "ok great! we'll start with the 40x thanks! " | Read more » | almost 7 years ago | |||
| kgradow1 | "Do you mean which magnification? Either 40x or 100x are good. I think the 40x is slightly easier to start with, since it's easier to find your m..." | Read more » | almost 7 years ago | |||
| stevie | "Hi @kgradow1 wondering which lens you would recommend for a starter kit for imaging some of the PM materials we've been speaking about? " | Read more » | almost 7 years ago | |||
| kgradow1 | "40x for $22: http://www.amscope.com/40x-achromatic-microscope-objective.html 100x for $31: http://www.amscope.com/100x-achromatic-microscope-oil-..." | Read more » | almost 7 years ago | |||
| warren | "Just wanted to link over to this discussion of copper "badges": https://publiclab.org/questions/warren/12-06-2017/what-are-some-options-for-copper-..." | Read more » | almost 7 years ago | |||
| warren | "Copying in that discussion here, as it belongs here more appropriately: Also thinking of making a kit -- here are individually packaged acetone wi..." | Read more » | almost 7 years ago | |||
| warren | "I was looking for some pre-cut smaller pieces of copper in standard sizes, in part to avoid the warping that cutting big sheets with shears can cau..." | Read more » | almost 7 years ago | |||
| warren | " Just a note that we'd looked at some single-use acetone nail polish removing pads, because people wouldn't necessarily need a whole bottle -- but..." | Read more » | almost 7 years ago | |||
| warren | "Hi, @gretchengerhke - would acetone melt nitrile or latex gloves? I'm thinking of how to ship some things like cotton scrub pads and safety gear wi..." | Read more » | almost 7 years ago |