difficulty:easy
difficulty:easy


Author Comment Last activity Moderation
warren "Hi, i saw you mentioned: it’s almost more like a polisher regarding the sandpaper -- was that a bad thing? Would you opt for a different grade of..." | Read more » over 6 years ago
warren "The spreadsheet was briefly unavailable but is now back online, thanks! " | Read more » over 6 years ago
warren "Just linking in here to the question where some of us have been looking for different materials and setups to do this test with: https://publiclab..." | Read more » over 6 years ago
warren "Hi, gretchen - the photos are great. Do you have a list of Amazon links and prices you could add -- as a step in getting a prototyping kit together..." | Read more » over 6 years ago
gretchengehrke "Here are before and after photos. We did not expect (and did not observe) any discoloration since we were only putting them out for less than 24 ho..." | Read more » over 6 years ago
gretchengehrke "Here is a picture after sanding one of the little copper strips. The green pad is actually soft sandpaper / polishing paper. " | Read more » over 6 years ago
gretchengehrke "Here is a picture of cutting the copper sheet into strips. " | Read more » over 6 years ago
gretchengehrke "Hi @warren, Thanks for the reminder to add pictures. I have tried inserting photos a few times today, but it keeps crashing the edit (and, seemingl..." | Read more » over 6 years ago
warren "And if there are any photos of these steps, i'd love to help make diagrams to illustrate the process! " | Read more » over 6 years ago
warren "Hi! Do you have photos you can attach for what the copper should look like before/after H2S exposure? Or after any possible false positives? " | Read more » over 6 years ago
zengirl2 "@gretchengehrke OK, ty for the response. Sounds like I need to check manufacturers about the copper tape to see how pure it is. Also, I was thinkin..." | Read more » over 6 years ago
gretchengehrke "Hi @Zengirl2, I'm not sure about the copper strips. Whatever copper is used needs to be fairly pure, and I'm not sure if the copper tape is pure c..." | Read more » over 6 years ago
zengirl2 "@gretchengehrke Do you know if copper tape can be used? I'm considering giving testers out at the Factory Farm Summit mounted on cardboard. Also, s..." | Read more » over 6 years ago
warren "And with some small extra tweaks and an extra diagram: foldable-2.0.4.pdf " | Read more » over 6 years ago
warren " foldable-2.0.3.pdf With instructions!!! Almost there. " | Read more » over 6 years ago
warren "Instructions! https://docs.google.com/presentation/d/1nLSUPLimHnQIJrKsrK4z9nqZmEezASSCkeWNZ1TxuLY/edit#slide=id.g274670c60f_0_0 Papercraft-Spectr..." | Read more » over 6 years ago
warren "Update -- I removed the tab-and-slots, to simplify cutting a bit, and added some instructions on how to cut out the windows with just scissors (thi..." | Read more » over 6 years ago
warren "I also worked on this, which is a bit easier to assemble and can go together without tape or glue, though it takes up more space on the page: http..." | Read more » over 6 years ago
stevie "We're hosting an event using this workflow tonight at the Warehouse in New Orleans, 3014 Dauphine Street from 6-8! https://publiclab.org/notes/stev..." | Read more » over 6 years ago
stevie "wow that's great! Thinking about hosting an event in New Orleans to work on this. I'll feed back in notes on when/where once that develops and we'l..." | Read more » over 6 years ago
chrowe "I created a web based map that shows Sierra Club's toxic sites and Harvey Ecological Hazards Map on top of NOAA's imagery https://arcg.is/0LTizq I..." | Read more » over 6 years ago
warren "I wasn't able to get GPS EXIF from Archive.org without downloading the full-res originals... that's why it's so slow! " | Read more » over 6 years ago
warren "Hi, @xose - trying to build out this workflow to generate a map of images if they have EXIF data. It's very slow, but you can read about progress h..." | Read more » over 6 years ago
cfastie "That's very clever. " | Read more » almost 7 years ago