Rivers, oceans, lakes, aquifers, groundwater, stormwater, urban canals, underground streams, estuaries, and more -- we are passionate about water quality! This page will help you find resources to explore the waterbodies you care about, and connect with other people who have the same interests: ### Questions on Water Quality: [questions:water-quality] **** ## Monitoring * [Water sampling](/water-sampling) * [Water sensors](/water-sensors) * Posts on #water-monitoring * Posts on #water-testing * Posts on #reagents ## Water quality parameters Read about different water quality parameters here, including pH, nitrogen, conductivity, temperature, ORP and turbidity: * https://publiclab.org/common-water-contaminants Also see this overview of 7 ways to monitorn water quality: * https://publiclab.org/notes/anngneal/12-08-2017/7-ways-to-measure-monitor-and-evaluate-water-quality ## Groups and projects working on water quality issues: [wikis:project:water-quality] **** ## Water quality related pages [wikis:parent:water-quality] **** ## Activities [activities:water-quality]...
| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| mathew | "changing the capacitance is really easy to explain to people. every transition from a peak to trough of the wave form is queued in by the filling ..." | Read more » | over 9 years ago | |||
| mathew | "yes. we should. It isn't directly evident why we would use audio, given that it is so incredibly data-intensive. We have to make that argument RE:..." | Read more » | over 9 years ago | |||
| donblair | "Aw, shucks :) But yes, it's so cool that we might find some part of design solution space that satisfies all of these! Before Ben pointing me to t..." | Read more » | over 9 years ago | |||
| mathew | "Your diligence in solving this calibration problem in the most user-friendly way that ALSO involves simplifying the electronics AND the signal out..." | Read more » | over 9 years ago | |||
| donblair | "Here's an example of a cheap, through-hole 'trimmer capacitor': http://www.amazon.com/Through-Trimmer-Variable-Capacitors-Brown/dp/B00G9BJTJW/ref=..." | Read more » | over 9 years ago | |||
| boczniak | "very good news :) " | Read more » | over 9 years ago | |||
| donblair | "Ah darnit, I deleted my comment above by accident, instead of editing it ... Okay, the punchline is: The only ways to compensate for the effect t..." | Read more » | over 9 years ago | |||
| donblair | "My endocrine system can't handle all of these ups and downs. But tonight ends on an up. " | Read more » | over 9 years ago | |||
| donblair | "UPDATE: We can dial in the capacitance! Ben pointed me to the fact that 'trimmers' exist: http://www.mouser.com/ProductDetail/Murata/TZB4R500EA1..." | Read more » | over 9 years ago | |||
| donblair | "Yes! And before, when we had a different relationship between freq and conductivity, the only way to do that tuning was to tweak the probe -- and J..." | Read more » | over 9 years ago | |||
| mathew | "this is super excellent. does this mean that people can assemble DIY probes with slightly different relationships that we can now tune to standard..." | Read more » | over 9 years ago | |||
| donblair | "(maybe that should prompt me to reconsider my life direction?) " | Read more » | over 9 years ago | |||
| donblair | "YES! :) I was dancing around with glee last night when I saw the equation for freq vs. resistance and capacitance for the 50% duty cycle! " | Read more » | over 9 years ago | |||
| warren | "This is great news!!! And well presented! " | Read more » | over 9 years ago | |||
| warren | "Great, thanks Don. I can change the title/body to reflect whatever name you think is more appropriate -- "Coqui-based water conductivity sensor"? ..." | Read more » | over 9 years ago | |||
| donblair | "Ah, this is all so great! This brings up a bunch of interesting issue for me that I'd love to get feedback on. Naming conventions. Maybe it'd be..." | Read more » | over 9 years ago | |||
| kanarinka | "Hey @warren @donblair and Katie - Nice work - this is simple and exciting. we did a home brewed test of Coquí here last weekend with hot/cold water..." | Read more » | over 9 years ago | |||
| lilybui | "Some open source spectral analysis software to check out. http://spek.cc/ (I like this one because it translates into 19 different languages.) ht..." | Read more » | over 9 years ago | |||
| mathew | "This is most excellent. I especially like how accessible audio analysis is. Pure Data is a great FOSS system for doing audio analysis, has built-..." | Read more » | over 9 years ago | |||
| liz | "awesome! Can't wait to see your notes and pictures! " | Read more » | over 9 years ago | |||
| JSummers | "Hi Leroy, The Stellaris was replaced by the Tiva boards. The code is compatible with both boards. They can be purchased for $13 direct from Texas..." | Read more » | over 9 years ago | |||
| justinmanley | "Hey! This looks like a cool project! Enabling users to embed multimedia on a map was (at one point) part of the spec for my GSoC project to impro..." | Read more » | over 9 years ago | |||
| vjpixel | "we'll be posting here. last friday we did a hackday about water, and this week I'll be posting some notes here. " | Read more » | over 9 years ago | |||
| Leroy2007 | "I'm trying to source the components locally but can't get the Stellaris eval-board here in Europe. According to Farnell, they're not being manufact..." | Read more » | over 9 years ago |