| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| mathew | "The Speck team indicates that airflow is a big issue. they're controlling with a fan. If I move the Speck around just a little bit the values cha..." | Read more » | over 10 years ago | |||
| mathew | "I found a scanner, the Canon 9000F and 9000F MKII, with an optical resolution of 9600dpi and an interpolated resolution of 19200dpi, or pixels 2.6μ..." | Read more » | over 10 years ago | |||
| stevie | "Neat Mathew! nice work. " | Read more » | over 10 years ago | |||
| eustatic | "Also, just want to repeat that corporate and government types are very sensitive to this kind of data. Even though I am tasked to work on water, I..." | Read more » | over 10 years ago | |||
| eustatic | "cool. My understanding is that, at least for coal dust (=mostly crystalline silica), most particles of interest fall in the PM10 category. GCMoni..." | Read more » | over 10 years ago | |||
| mathew | "Ok. Updated. the situation is better than I thought. A 4800dpi scanner could definitely give straight PM10 measurements, possibly with identifica..." | Read more » | over 10 years ago | |||
| mathew | "Ok-- apparently my math is all wrong. I thought DPI was dots per square inch. this is completely wrong. it is dots that can be placed in a line o..." | Read more » | over 10 years ago | |||
| mathew | "@eustatic in a bit, lets get something working first ;-) @warren A smartphone would definitely work for identifying silica! its just a matter of m..." | Read more » | over 10 years ago | |||
| btbonval | "Not to derail the post, but am I the only one who thinks those pictures look like they were taken from the Hubble telescope? " | Read more » | over 10 years ago | |||
| 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 | |||
| 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 | |||
| 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 | |||
| 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 | |||
| warren | "So I think the sensor the Speck is using, the "Syhitech DSM501A" (http://publiclab.org/notes/chrisbartley/04-15-2014/speck-particle-monitor) is ~$2..." | Read more » | over 10 years ago | |||
| warren | "Willie just posted a followup about a field-test of the optical sensor component: http://publiclab.org/notes/Willie/04-01-2014/field-testing-the-sh..." | Read more » | over 10 years ago | |||
| eustatic | "Lots of Frack Sand in Coastal Mississippi " | Read more » | almost 11 years ago | |||
| eustatic | "cool. " | Read more » | almost 11 years ago | |||
| Schroyer | "Hi eustatic, The particulates sensor being used for the DustDuino could not identify the composition of the particulate matter, but indeed could b..." | Read more » | almost 11 years ago | |||
| eustatic | "Anyway, Jeff I was thinking of using this as a possible screening tool with the ongoing PM sampling that we are doing in Plaquemines, in prepara..." | Read more » | almost 11 years ago | |||
| eustatic | "Aidan, I think the github link is in this writeup? I dunno, i'm a biologist, i don't speak github well. Schroyer, that is cool. Bogalusa? or som..." | Read more » | almost 11 years ago | |||
| Aidan | "Awesome! Is this on github? " | Read more » | almost 11 years ago |