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Comments

Author Comment Last activity Moderation
MadTinker "Thought this might be of interest to some. I dug around and found 2-3 global efforts to track meteors. The tracking efforts involve not just ident..." | Read more » 8 months ago
MadTinker "Thanks, but familiar with those " | Read more » 10 months ago
MadTinker "Thanks for info. The projects linked are interesting but quite different. A spring flood and some changes to the local EPA have encouraged me to mo..." | Read more » 10 months ago
MadTinker "SNOTEL uses snow pillows which are devices about 3m x 3m, that sit on the ground and measure the hydrostatic pressure of the snow that falls on the..." | Read more » almost 2 years ago
MadTinker "Thanks Chris, unfortunately we generally have sunny weather so a laser is generally out. In addition, last year we rec'd 4.14m (163") of snow, wit..." | Read more » almost 2 years ago
MadTinker "We take two different samples: one sample is used for local chemistry analysis (alkalinity, pH, hardness, ...). That sample is collected typically ..." | Read more » almost 2 years ago
MadTinker "Nice explanation. I do this a few times a month and this is the same procedure accepted in Colorado. The one minor difference is the option to use ..." | Read more » almost 2 years ago
MadTinker "Thanks, nothing showed up using the usual search fn. I’ll definitely track these links down " | Read more » over 2 years ago
MadTinker " @warren You know it's pretty sad when I don't catch things like this myself :smiley: I was referring to the raw data. " | Read more » over 2 years ago
MadTinker "I've successfully used the DFRobot TDS/conductivity sensor combined with the a Mini-Pearl system. The Coqui was much too noisy. My Arduino setup wa..." | Read more » over 2 years ago
MadTinker " @belkinsa I’d strongly suggest the Winkler test for monitoring DO. It’s easy, can be done reliably by 14+ yr old kids. Works on lakes, rivers, etc..." | Read more » almost 3 years ago
MadTinker "A couple of clarifying questions: do you have a time period in mind for sampling before data collection/processing? do you have any form limitati..." | Read more » about 3 years ago
MadTinker " do not use DO sensor On a monthly period, at a number of sampling locations in the watershed, air/water temperature are collected and: DO, Ha..." | Read more » about 3 years ago
MadTinker "Just a quick update on the status of this project. Willow Creek is going through a couple of serious events. First, the stretch of the stream where..." | Read more » over 3 years ago
MadTinker "@cfastie FWIW I used a Kalman filter algorithm for my TDS analyses with data from a similar setup data logger setup. I believe that my original im..." | Read more » over 3 years ago
MadTinker "@youshen I think with the modifications that have been suggested, the particular RTC module that I've been using will work fine and support running..." | Read more » over 3 years ago
MadTinker "@cfastie Thanks Chris, I'd had forgotten this particular mod by Ed Mallon, and didn't notice the mods on your modules. I need to go back and review..." | Read more » over 3 years ago
MadTinker "@warren Thanks. Perhaps, but if the info in the link is true, the solution is just finding a new RTC module that runs at 5V. I misread the power re..." | Read more » over 3 years ago
MadTinker "@Ag8n - yeah, pretty sure you're right about filtering. I also think there are some calibration issues that remain even with a perfect sample. Sti..." | Read more » over 3 years ago
MadTinker "spectrophotometric technique: Ground and river water quality monitoring using a smartphone-based pH sensor " | Read more » over 3 years ago
MadTinker "Ran across this article that discusses at a high level the relationship between salinity, TDS, and conductivity. Reference . It specifically mentio..." | Read more » over 3 years ago
MadTinker "Confirm? Hmmm... well, I have two data points, both of which coincidently use the same multiplier on EC to get TDS. From discussions with folks wh..." | Read more » over 3 years ago
MadTinker "DFRobot makes a Turbidity Sensor For Arduino (SKU:SEN0189). It's sitting in my forge right now and integrating it with a Mini-Pearl logger ( @cfast..." | Read more » over 3 years ago
MadTinker "An quick update: The TDS sensor from DFRobots performs as describes. Very easy to connect to the MiniPearl logger. In general, it collects a voltag..." | Read more » over 3 years ago