Comments

Author Comment Last activity Moderation
mathew "it looks like your links aren't heading straight to JungleRythms.org. neat project! I tried out a single set. looks doable! " | Read more » about 8 years ago
EdMallon "One of my high school teacher friends mentioned that he wanted add Arduino based projects to his science classroom, but after I posted those DIY gu..." | Read more » about 8 years ago
mathew "I screen-capped this graph of different sensors and their sensitivities and put it in this comment, the original link is dead. " | Read more » about 8 years ago
mathew "FLIR is looking in a narrow band-- 3200-3400nm -- where these hydrocarbons are most absorptive. @geraldmc pointed out that there are weaker absor..." | Read more » about 8 years ago
Thomas12345 "Hey, if you are still looking for more information how to get good camera, here's the good resource: http://bestquadwithcamera.com/tips-and-guides/..." | Read more » about 8 years ago
khufkens "http://www.flir.com/uploadedFiles/CVS_Americas/Cores_and_Components_NEW/Resources/flir-lepton-datasheet.pdf : says, 8 to 14 μm which seems to be to..." | Read more » about 8 years ago
cfastie "That's excellent. Maybe a good order of magnitude cheaper than a FLIR camera. There seems to be a typo in the description of the IR range covered ..." | Read more » about 8 years ago
khufkens "@marlokeno It's not cheap (although it's $100 than it used to be, mmm) but it sure is DIY and within the larger amateur budget. https://www.sparkf..." | Read more » about 8 years ago
cfastie "When the kmz file (attached in the previous comment) is loaded in Google Earth you must click "Exit Photo" to regain control of Google Earth. Then ..." | Read more » about 8 years ago
eustatic "Ha. These questions are painful. " | Read more » about 8 years ago
cfastie "Lots of people have used MapKnitter to place images that are not aerial photos they have taken. Some of these are older aerial photos which must be..." | Read more » about 8 years ago
gretchengehrke "Conductivity readings would indicate the presence of ions, but since there is so much calcium, and also substantial amounts of magnesium etc, it wo..." | Read more » about 8 years ago
gretchengehrke "Fabulous post, Scott. Thanks! For each of these situations, would the process be to try to convince Louisiana DEQ that there is oil and that the oi..." | Read more » about 8 years ago
khufkens "On the raspberry pi camera there is no real focus, so you either unscrew the lens assembly (google macro lens / macro photography and raspberry pi ..." | Read more » about 8 years ago
ajawitz "@cfastie- Have you or others done and/or documented any other work with historic aerial imagery? This is a subject I've been very much interested..." | Read more » about 8 years ago
cosettespafford "Thank you, Chris! Your explanation really helped! Cosette " | Read more » about 8 years ago
cosettespafford "Can you let me know how you focused your camera? I just finished my spectrometer yesterday; I can take spectral images at this point, but they need..." | Read more » about 8 years ago
shubham "In the commercial spectrometer measuring milk fat%, the range is mostly between 600-1100nm. Could you correlate the peaks with the actual fat% in t..." | Read more » about 8 years ago
cfastie "Hello, Some experiments suggested that viewing the spectrum at a slight angle (from perpendicular to the grating) produced a clearer image of the ..." | Read more » about 8 years ago
cfastie "I guess you are referring to the video on this page: https://publiclab.org/wiki/spectral-workbench-usage, which is this video: https://www.youtube...." | Read more » about 8 years ago
lucca_fabani "Hi Chris, I am using the v3 Spectrometer kit, I have tried different light sources, the one i am currently using is a white LED, i have tried with ..." | Read more » about 8 years ago
cfastie "What video are you referring to? What spectrometer are you using? What light source are you using? Chris " | Read more » about 8 years ago
pdhixenbaugh "Would it be possible to have a variant using standard batteries? It's not too big of a deal to order a special battery, but in some places and situ..." | Read more » about 8 years ago
cfastie "We can't see methane because visible light passes right through it. DIY infrared cameras based on consumer cameras can't detect methane because nea..." | Read more » about 8 years ago
cfastie "The Bayer filters determine how wavelengths are separated into the three color channels. This is how the camera can sense the balance between the t..." | Read more » about 8 years ago
poo "this green photo don't Relevance to Bayer pattern Mr. @cfastie ? " | Read more » about 8 years ago
eustatic "I'm unsure about the claims, but at least one vaccuum company advertises that its unit can 'wash' the air. Of course, the unit moves a larger volu..." | Read more » about 8 years ago
marlokeno "Thanks to Chris for some lucid suggestions. I have some questions, and ideas for improvements after reading your post. Question: I don't understan..." | Read more » about 8 years ago
cfastie "This is very good data -- two independent reports that moss grows under deciduous forests in Sweden. Martenskram suggested two hypotheses that coul..." | Read more » about 8 years ago
cfastie "If bubbling room air through an aquarium removes some dust from the air (including some silica dust) then growing diatoms in the water is not requi..." | Read more » over 8 years ago