Comments

cfastie commented on Best NDVI Filter : "Are you interested in the difference between a blue filter and a red filter? A blue filter could be referred to as NGB (red is blocked and NIR repl..." | Read more » 1 day ago
xose commented on Rede InfoAmazonia : "Hi aryachandran, the Mae d'agua measures acidity in water by power of hydrogen (pH), oxidation reduction potential (ORP), water conductivity, water..." | Read more » 1 day ago
mathew commented on Raspberry Pi problems : "@bkeist do you want to try troubleshooting it live? could you join next Tuesday's open call? its from 2-3 Central time. " | Read more » 2 days ago
aryachandran commented on Rede InfoAmazonia : "what are the different sensors which has been used for your project .....................please reply as soon as possible , we are desperate .... " | Read more » 2 days ago
Zengirl2 commented on What makes a good activity? : "For those people using Public Lab software, it would be helpful to include set-up info for the activity or for posting questions: Computer/Model ..." | Read more » 3 days ago
Zengirl2 commented on What makes a good activity? : "For those kits or projects using software/computers, it would be handy for people to write down basics of their setup for the activity, as well as ..." | Read more » 3 days ago
nedhorning commented on Improved DIY NIR camera calibration : "Hi sujayj - I uploaded files with the target descriptions and reflectance information to my Google Drive: https://drive.google.com/drive/folders/0B..." | Read more » 3 days ago
sujayj commented on Calibration cogitation : "@cfastie This is very interesting. Thank you! " | Read more » 3 days ago
sujayj commented on Improved DIY NIR camera calibration : "@nedhorning I have been looking to carry out calibration but was halted by the expensive costs of targets. After reading through your article, I re..." | Read more » 3 days ago
bkleist commented on UWEC air quality monitoring : "Unfortunately the cameras had been giving us a lot of trouble, and have not yet been deployed. The good news is that I was able to figure out how t..." | Read more » 4 days ago
xose commented on Public Lab Featured on PBS Documentary : "Woooow!!!!! Congrats! The first chapter makes you wanna put on the boots and get out there ;) " | Read more » 4 days ago
liz commented on What makes a good activity? : "As a next step, i'd like to think about how to improve/update an activity that someone figures out while replicating the original activity. CC @mat..." | Read more » 5 days ago
cfastie commented on DIY spectrophotometer? : "I am not familiar with the optics equations. My approach would be to enable precise adjustments of the components and find the best resolution (cri..." | Read more » 5 days ago
cfastie commented on Calibration cogitation : "Yes, we are going to change the pixel values in our photo. For each pixel in the photo we have taken of vegetation, we use the DN in the red channe..." | Read more » 5 days ago
richardbowman commented on Sizing particles in microscope images at Portland Science Hackday : "Hello, "Cambridge" here (though I've actually moved now). You're right, a laser diode would certainly get rid of the chromatic issues. I suspect ..." | Read more » 5 days ago
sujayj commented on Calibration cogitation : "@cfastie This is a very informative article. However, It isn't clear what is to be done after obtaining the final graph as you've shown. Are we goi..." | Read more » 6 days ago
cfastie commented on NIR to NDVI : "I think the Public Lab Infragram camera has a red filter, so the red channel will capture mostly red light. The blue channel will capture mostly NI..." | Read more » 6 days ago
Zengirl2 commented on Public Lab Featured on PBS Documentary : "It was great to watch this and I thought Public Lab and Open Street Map were awesome for Episode 1. Already blogged on Adafruit and did share. Keep..." | Read more » 6 days ago
cfastie commented on U-blox GPS board : "Update: The u-blox NEO-7M board can be powered with either 3.3 or 5 volts. The GPS module itself is not tolerant of more than 3.6 v, but the board ..." | Read more » 6 days ago
nedhorning commented on Improved DIY NIR camera calibration : "Hi jenjimah, Testing any of these and reporting back would be worthwhile from my perspective. One word of caution is that these are very bright re..." | Read more » 6 days ago
jenjimah commented on Improved DIY NIR camera calibration : "Hello Ned, thank you for all your work on this subject. Currently I am looking for low-cost materials that can be used as reliable standards for N..." | Read more » 6 days ago
Dave-O commented on Public Lab Featured on PBS Documentary : "I will share this with my social media followers! " | Read more » 8 days ago
tuczap commented on Measure coarse and fine air particulates with a DustDuino : "I'm using thingspeak to post my data online as Xively is not free anymore or at least you can't use free account to post all this data online. I'v..." | Read more » 9 days ago
aayushgupta1 commented on GSOC - Upgrade Plot to Rails 4 and Email Notification Overhaul : "@jywarren This has been updated. Kindly check. " | Read more » 11 days ago
ghing commented on Getting your WheeStat set up. : "I ordered a WheeStat from the Public Lab Store. The board is stamped "WheeStat 5". I'm running Ubuntu 16.10 (64-bit) and just wanted to share the..." | Read more » 13 days ago
nshapiro commented on DIY Formaldehyde Test Kit : "Hi @indy if you're based in Indiana, as your name hints, you can report your symptoms to the stat DOH and they might come out and test for free. In..." | Read more » 14 days ago
Odie91 commented on Build a plant-based air purifier : "Hi, this is an interesting project. I'm curious, do you think it's really necessary to convert the aquarium pump from blower to suction? If you b..." | Read more » 15 days ago
warren commented on Hi, about fido alarm output's : "Hi!! I think @rjstatic could help answer this one? " | Read more » 15 days ago
gkb commented on Intended Purposes for Different Tools and Techniques : "BASIC INFORMATION Project Name Project Objective (qualitative, quantitative, both) Media to be measured (Air, Water, Land, combo, people‚Äôs opinions..." | Read more » 15 days ago
cfastie commented on DIY NIR Test with Filter Kit #1 : "That's a good result from Infragram.org. The result could be different outside because the color of the light can influence the proportion of visib..." | Read more » 15 days ago