| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| liz | "Hi @Karik, do you have a link to LabVIEW? " | Read more » | over 5 years ago | |||
| danbeavers | "By the tube, I assume you mean the manometer. The most accurate way to accomplish this would be to make a scale that is calibrated to your setup a..." | Read more » | over 6 years ago | |||
| stevie | "great PDF write up. say someone was to mount the tube on the wall where the water changes. What might a scale look like for it that could be posted..." | Read more » | over 6 years ago | |||
| danbeavers | "In electrical terms this is analogous to measuring the voltage across a resistor to determine current where the pressure is voltage and the needle ..." | Read more » | over 6 years ago | |||
| donblair | "Wow, great work. Sorry that there's so much trouble dealing with drivers for this USB-Serial chip! Re: the capacitive sensor circuit ... do you s..." | Read more » | almost 8 years ago | |||
| mathew | "@donblair more sensor info for Diana? " | Read more » | almost 8 years ago | |||
| cfastie | "For $25 that hydro generator has got to be a good thing. It is an impartial solution for my spring house because it can't freeze (operating range 4..." | Read more » | about 8 years ago | |||
| donblair | "Oh, exciting ... it'd be fun to demonstrate anything powered by moving water. Maybe this thingy should be ordered immediately. A visit ASAP sound..." | Read more » | about 8 years ago | |||
| cfastie | "That hydro generator says it needs 3 liters per minute, which we have. Sorry about revealing your irrelevance. Also, we wouldn't need the internet..." | Read more » | about 8 years ago | |||
| donblair | "Exactly. Was confusing for me, too, as I'd been nursing a rather fixed mental picture of a parallel plate capacitor with a dielectric slab sandwic..." | Read more » | about 8 years ago | |||
| cfastie | "Why does this work when the two wires (the extension cord) are insulated? It must be that the electric field extends outside the wires into the wat..." | Read more » | about 8 years ago | |||
| donblair | "This sounds like it might prompt a PVOS research trip up to Bernie Country ... I need to write up a research note, but here's the basic idea (cour..." | Read more » | about 8 years ago | |||
| cfastie | "Don have you described somewhere how in the world this thing measures water depth? I need this and I discovered today that my spring house up in th..." | Read more » | about 8 years ago | |||
| donblair | "Hi @gretchengehrke :) I'd never really testing it very thoroughly, and I haven't done sufficient background research to know if the 555 approach I..." | Read more » | about 8 years ago | |||
| gretchengehrke | "Hey Don -- How well does the depth feature work? @stevie and I were just talking about it, and are needing a reminder. :) " | Read more » | about 8 years ago | |||
| donblair | "And a great study of capacitive depth measurements is here: http://www.umbc.edu/cuere/BaltimoreWTB/pdf/TM_2009_003.pdf " | Read more » | over 9 years ago |