| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| warren | "Nice! What kind of lens would it take to make a smartphone can work? I'm thinking about plastic or resin lenses... and portability, but probably ju..." | Read more » | over 10 years ago | |||
| eustatic | "cool, want some coal dust to play with? " | Read more » | over 10 years ago | |||
| mathew | "In my silica wiki page, I mentioned polarized light microscopy as a detection method, and yes, I'm looking into it. What you see here is polarized..." | Read more » | over 10 years ago | |||
| donblair | "Bryan, xxv, Chris, Dave -- thanks so much for the fantastic ideas and reflections you've developed here. I'm going to try to digest these ideas ov..." | Read more » | over 10 years ago | |||
| btbonval | "Those are great links, DavidMack. The TSI document illustrates the tube of air I was talking about that carries the sample for measuring ("sheath-..." | Read more » | over 10 years ago | |||
| donblair | " Ah, you didn't fail at all -- I just keep dithering about the final design, and have been hestitating to hit 'print' :) But I think this might be..." | Read more » | over 10 years ago | |||
| warren | "I know i've a quick trigger finger on the "like button", but i am so jazzed about this. Don, i failed to order your circuit boards, didn't I? I am..." | Read more » | over 10 years ago | |||
| DavidMack | "Okay, I read the research paper and the heat convection air flow dependent on the sensor orientation. I also found this report which describes the..." | Read more » | over 10 years ago | |||
| DavidMack | "I'd say the heater/resistor is used to heat the air sample to avoid condensation in the chamber and on the optics. Also, any aerosol (liquid and s..." | Read more » | over 10 years ago | |||
| cfastie | "Instead of trying to measure air flow, you could impose a constant air flow. Chris Bartley said they got better results with a small fan in their S..." | Read more » | over 10 years ago | |||
| btbonval | "It is unlikely that you can do anything to stop deposition, but you could slow it. Not sure what degree of "prevent" you were asking about. There a..." | Read more » | over 10 years ago | |||
| xxv | "Would there be a way to create a field or surface coating of the glass flow tubes that prevents accumulation of particles? " | Read more » | over 10 years ago | |||
| btbonval | "The linked anemometer relies on heat differential. I don't see the tech specs, but I'd be worried that in excessively hot environments the backgrou..." | Read more » | over 10 years ago | |||
| btbonval | "For reference, I have experience with Hach HHPC6 units (taking them apart, cleaning them, diagnosing their measurement capability, etc). I think yo..." | Read more » | over 10 years ago | |||
| btbonval | "Some of the particle counters I have used in the past worked on a straight, column of air. It looks like your box is more like a mixing chamber tha..." | Read more » | over 10 years ago | |||
| donblair | "Thinking about this a bit further: when determining particle counts, is the "% low pulse occupancy time" technique relatively insensitive to tempe..." | Read more » | over 10 years ago | |||
| willie | "Awesome commentary here. By popular demand: a dustduino wiki page: http://publiclab.org/wiki/dustduino Got to give the people...give the people ..." | Read more » | over 10 years ago | |||
| mathew | "I got some big (4"x8") sheets from american science and surplus. I was going to see what happens when I put some silica dust down on a flatbed wit..." | Read more » | over 10 years ago | |||
| warren | "We could use smartphone or laptop screens for polarized light, or steal 3d glasses from movie theaters. I guess polarized light isn't in short supp..." | Read more » | over 10 years ago | |||
| donblair | "Hi Folks! Great comment thread here. Just following up on Schroyer's lead: the github code had a nice link, in a commented section, to a useful ..." | Read more » | over 10 years ago | |||
| beadias | "Hi Scott, Gerald and all. Thanks for all the comments! The Speck is currently not commercially available, but could be very soon. Please sign up f..." | Read more » | over 10 years ago | |||
| illah | "So I'll try to answer some ?'s: The Shinyei was around $15- we tried that first. The Syhitech is something like $3 in reasonable quantities. So it'..." | Read more » | over 10 years ago | |||
| Schroyer | "Hi Warren, The Syhitech looks neat, especially for the price point, but I would like to see more peer-reviewed studies to confirm how well the sen..." | Read more » | over 10 years ago | |||
| warren | "Is reading from the Shenyei really as easy as this? valP1 = digitalRead(8); valP2 = digitalRead(9); What do the values represent, or how do you ..." | Read more » | over 10 years ago |