question:general
question:general


Author Comment Last activity Moderation
Ag8n "There are several other previous questions that discuss this. But crazy is is correct, all tds meters are conductivity meters. One side note- ther..." | Read more » almost 7 years ago
cfastie "I agree that the DFRobot TDS sensor looks like a useful device at a good price. My lame understanding is that this and other sensors which purport ..." | Read more » almost 7 years ago
warren "The NoIR camera ships with a filter -- it's actually the same as the blue filter in our filter kit, as it was developed based on our community's wo..." | Read more » almost 7 years ago
gretchengehrke "Also, I just saw on comptox.epa.gov that acetone is actually more hydrophilic than isopropanol, which totally surprises me! I guess vapor pressure ..." | Read more » almost 7 years ago
gretchengehrke "Either acetone or 99% isopropanol are probably fine, and maybe we should do a comparison. The only concern I see with isopropanol is that it has a ..." | Read more » almost 7 years ago
warren "Just as a price reference, Thingiverse offers a kind of crowdsourced printing service and various services seem to offer about $12 as a quote for t..." | Read more » almost 7 years ago
warren "There seems to be a small piece that sits under the camera too! http://partsandcrafts.org/pi_microscope/picam2_lens_gripper.stl That would be ama..." | Read more » almost 7 years ago
cfastie "There is one part at Thingiverse. Is that the only one you need printed? The part at Thingiverse has a flat horizontal lower surface which could ca..." | Read more » almost 7 years ago
Bronwen "I think it probably depends somewhat on what we need the cleaning agent to do: alcohol and acetone work a little differently, and acetone will like..." | Read more » almost 7 years ago
warren "@asnow @bronwen " | Read more » almost 7 years ago
warren "@gretchengehrke mentioned: Isopropanol has pretty similar properties, but the commonly available rubbing alcohol in drug stores is 70% isopropanol..." | Read more » almost 7 years ago
warren "I posted this on Thingiverse too! https://www.thingiverse.com/thing:2820427 " | Read more » almost 7 years ago
warren "Just FWIW we've compiled up a few options for Trello-type task tracking. Do people have opinions or likes/dislikes, pros/cons on these? https://do..." | Read more » almost 7 years ago
liz "Hi @Alanrday, sorry to hear you are having trouble. Please email web@publiclab.org to delete your account. Consider calling into Open Call Tuesday ..." | almost 7 years ago
warren "Hi! Can you post this at github? https://github.com/publiclab/plots2 Thanks! We're happy to help! " | Read more » almost 7 years ago
warren "Hi liz! I see there are several moving parts here: some is like wiki gardening some is like communication (posting update summaries) some is faci..." | Read more » almost 7 years ago
warren "Hmm, can you upload a good resolution pic of your device so we can see? " | Read more » almost 7 years ago
PhillipLyons "I have seen it on Youtube, A guy was doing it. I can't remind of the link. But you can definitely try Youtube buddy. " | Read more » almost 7 years ago
PhillipLyons "You can get Maximum Knowledge form here https://www.encyclopedia.com/science-and-technology/astronomy-and-space-exploration/astronomy-general/spect..." | Read more » almost 7 years ago
warren "@pdhixenbaugh -- this sounds related to some stuff you've been talking about! It could also be really good for #community-kits work! " | Read more » almost 7 years ago
liz "@pdhixenbaugh thanks for encouraging this conversation! " | Read more » almost 7 years ago
caguldi03 "Yes. I saw that and am hoping I will be able to join the call. " | Read more » almost 7 years ago
liz "Hi caguldi03! Would you like to join an open call tomorrow? They happen every Tuesday at 2pm Central / 3pm ET. All topics welcome, you can see a fe..." | Read more » almost 7 years ago
Markos "Hi, There are two types of current that can be generated when two conductive materials are dipped into the water. 1- Faradaic current 2- Non Farad..." | Read more » almost 7 years ago