answered
answered


Author Comment Last activity Moderation
stevie "Hi Jeff, thanks! This is great. I'll copy the question link into that email chain as well. Think some of the readers there would be interested, it'..." | Read more » over 7 years ago
stevie "Wow. These are awesome resources!! Thanks for clarifying the seeing/sizing distinction. " | Read more » over 7 years ago
warren "@pdhixenbaugh - any thoughts on this? " | Read more » over 7 years ago
guolivar "Yes, environmental conditions do affect the ability of an optical sensor, not too much to "see" a particle but rather to "size" it. All of these o..." | Read more » over 7 years ago
jeffalk " Yes is the simple answer: high humidity and/or moisture can effect particulate counts by raising them. Once you accept this the next step is how..." | Read more » over 7 years ago
mikekaliven87 "Wow, why do you need that? " | Read more » over 7 years ago
cfastie "The prices at Aliexpress seemed to be the about the same as at Amazon. Some of the product descriptions at Aliexpress named the sensor. For exampl..." | Read more » over 7 years ago
hank "I suggest you try aliexpress.com instead of Amazon -- why pay double or more money for stuff when you can buy it direct from China? They are an um..." | Read more » over 7 years ago
cfastie "A good starting point for evaluating these sub $60 action cameras is the sensor. Many if not all of these cameras use sensors that do not have as m..." | Read more » over 7 years ago
cfastie "Here is a better answer. The first time the sketch tries to read the BMP280 sensor is immediately after the sensor has been initialized. So the sen..." | Read more » over 7 years ago
cfastie "Way to go getting the Nano Logger logging! The first elevation data point is always wacky because the first barometric pressure data point is alway..." | Read more » over 7 years ago
MadTinker "Thanks for the info Chris. I also ran across the KnowFlow that has a lot of pretty good info. They also rely heavily on the DFRobot sensors. Until..." | Read more » over 7 years ago
cfastie "That sounds like a wonderful "opportunity." It is also a revealing test case for the suitability of DIY environmental loggers to serve their maste..." | Read more » over 7 years ago
stevie "Responses from the mailing lists: Hi Carol! So excited to work on this at Barnraising! Someone correct me if I'm wrong, but the data loggers will ..." | Read more » over 7 years ago
warren "Carol chipped in on the mailing lists: My first question is, similar to Chris's, what can the data loggers do? Conductivity? Turbidity? pH, dissol..." | Read more » over 7 years ago
cfastie "Okay, now I understand the question. It's really helpful to know what data logger hardware you will have. You will have a Nano Logger Kit. You will..." | Read more » over 7 years ago
stevie "Hi Chris, thanks a bunch! I'm hoping we can work on developing out an activity of two for people to do in first experimenting with data loggers as ..." | Read more » over 7 years ago
warren "These are some really good questions, many of which get at the question of "constraints" -- i.e. what constraints are you designing towards? A spec..." | Read more » over 7 years ago
warren "I've just bought a $40 GoPro look-alike that has WiFi, and will be testing it out at the Appalachia Barnraising. We'll check in once we've done thi..." | Read more » over 7 years ago
cfastie "Stevie, it sounds like you are looking for demonstrations of things data loggers can do. That really depends on what logger(s) you have and what se..." | Read more » over 7 years ago
warren "Possibly some of the Coqui activities (which were designed for real-time monitoring, not data logging) could be adapted for a data logger? https:/..." | Read more » over 7 years ago
nshapiro "Here is the EPA's take on that: https://www.epa.gov/air-research/village-green-project Its rather expensive but losing the PM 2.5 monitor would sa..." | Read more » over 7 years ago
warren "These or similar cameras are as low as $40 now! https://www.amazon.com/gp/aw/d/B01DG9UMS6/ Via @azaelb at https://publiclab.org/notes/azaelb/12-04..." | Read more » over 7 years ago
nanocastro "this is open source option from CTA Brasil. Documentation in portuguese " | Read more » over 7 years ago