| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| zamudio | "Ned, I have been working in the spectrometry field for many years and have been involved in calibrating various hyperspectral sensors. I plan on us..." | Read more » | about 10 years ago | |||
| donblair | "Oh, toilet tank analogy is great! @cversek was talking at LEAFFEST about how, in the water <--> electricity analogy, the only sticking point..." | Read more » | about 10 years ago | |||
| 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 » | about 10 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 » | about 10 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 » | about 10 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 » | about 10 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 » | about 10 years ago | |||
| boczniak | "very good news :) " | Read more » | about 10 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 » | about 10 years ago | |||
| donblair | "My endocrine system can't handle all of these ups and downs. But tonight ends on an up. " | Read more » | about 10 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 » | about 10 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 » | about 10 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 » | about 10 years ago | |||
| donblair | "(maybe that should prompt me to reconsider my life direction?) " | Read more » | about 10 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 » | about 10 years ago | |||
| warren | "This is great news!!! And well presented! " | Read more » | about 10 years ago | |||
| warren | "Another draft of the paper research note: I also made a Post-It notepad of these on Zazzle.com: http://www.zazzle.com/public_lab_paper_research..." | Read more » | over 10 years ago | |||
| stevie | "Draft event guide posted: http://publiclab.org/notes/stevie/08-13-2014/working-oil-testing-event-guide " | Read more » | over 10 years ago | |||
| stevie | "I agree! In this event, we were testing out a number of different bottle options, trying to source the best ones. (you can see some of the ones we..." | Read more » | over 10 years ago | |||
| bsugar | "hmmm...well, this presents a dilemma in that Public Lab will be the only ones with the purchasing power to buy them inexpensively, but people will ..." | Read more » | over 10 years ago | |||
| warren | "The orig bottles were basically square, but not very precise -- sort of that wavy crude surface from molded glass. But I have a sense that there's ..." | Read more » | over 10 years ago | |||
| bsugar | "regarding the new bottles, in my search to find alternatives, it seems like even the squarest of bottles on the outside have some curvature on the ..." | Read more » | over 10 years ago | |||
| bsugar | "@stevie, it would be very helpful. I think all and all this makes an excellent framework for any workshop, in particular the part where you have t..." | Read more » | over 10 years ago | |||
| warren | "I like the idea that if there are 4 tables, four different organizers can sort of "staff" the tables, focusing on the parts they know best. " | Read more » | over 10 years ago |