jodybarbee commented on Kinect for 3d mapping from a car : "3D modeling is so interesting. I remember a couple of years ago I made a set of dishes for my daughter using a 3D printer. I think in the future it..." | Read more » about 1 hour ago kokoz commented on Is Lego Spectrometer Kit able to detect Glucose? : "I think the sucrose is in different wavelenghts? in human body sucrose is broken down in to glucose.. " | Read more » about 1 hour ago jodybarbee commented on Grassroots Mapping is an Honorable Mention for Best Tech Project at the 2010 Kickstarter Awards : "Beautiful article " | Read more » about 1 hour ago roberts_ecofarm commented on Inexpensive conductivity probe Step 1 - Sensor Probe design (revised) : "So, after reviewing my drawings I discovered I'd made a huge mistake on the cell constant (K) in the two post probe design. The cell I designed wo..." | Read more » about 15 hours ago jeffalk commented on What is the correct AQI measure ? : "I just reviewed this conversation and would like to add to it and would like comments from @sagarpreet and @guolivar if possible. About the USEPA ..." | Read more » 1 day ago xose commented on Is a Water Proof Solar Raspberry Pi Camera project viable? : "Sorry, yes, the upper right is the solar panel. In relation to the battery needed I really don't know. As we turn it off for 57 minutes every hour,..." | Read more » 1 day ago xose commented on Is a Water Proof Solar Raspberry Pi Camera project viable? : "Hi @icarito! In that setup we're using this solar panel to lipo pcb, and from that to the Witty Pi energy manager → https://www.seeedstudio.com/LiP..." | Read more » 1 day ago warren commented on What are your thoughts on this initial sketch for a Tag page on PublicLab.org? : "OK, sounds good. Thank you! On Wed, Nov 14, 2018 at 9:06 AM \ wrote: Hi! There's been a response to a discussi..." | Read more » 1 day ago cfastie commented on Why are the PM10 particles of the Purpleair monitor biased so high? : "The field evaluation report linked above includes 78 graphs comparing the results of a Purple Air sensor with a $25k GRIMM optical particle counter..." | Read more » 1 day ago kelv commented on What are your thoughts on this initial sketch for a Tag page on PublicLab.org? : "Hello Warren, I needed this so that I know how to implement the cards.. but its ok.. I'll just have it static.. for now... For the latest HTML mock..." | Read more » 1 day ago stevie commented on Why are the PM10 particles of the Purpleair monitor biased so high? : "Hi @Cbarnes9 thanks for sharing out the questions! I'm also curious where you're referencing the field test for PM10 to be biased high? Is it in t..." | Read more » 1 day ago warren commented on Can I upgrade a DIY spectrometer with a Raspberry Pi camera? : "Some serious progress has been made on this, for running SpectralWorkbench on the Raspberry Pi and connecting to it's camera: https://github.com/pu..." | Read more » 2 days ago warren commented on Microscope Webcam Conversion : ":-) good to know!!! We're looking for slightly better webcams now too. We found this one is pretty nice, and we are getting them for about$30, al..." | Read more » 2 days ago warren commented on Can anyone provide direction for technical problems using the lego spectrometer thanks : "Hi, @mblumhar - thanks for the suggestion. I think it makes sense. I've isolated out the code which would need to be ported in order to get this w..." | Read more » 2 days ago warren commented on What are your thoughts on this initial sketch for a Tag page on PublicLab.org? : "Hi, Kelvin - no worries - actually you don't need to be doing any database work yet; we will be integrating your code, or pieces of it, into this p..." | Read more » 2 days ago kelv commented on What are your thoughts on this initial sketch for a Tag page on PublicLab.org? : "@warren, which databases do you use? I need to know so that I can generate an algorithm for it. Thanks " | Read more » 2 days ago icarito commented on Is a Water Proof Solar Raspberry Pi Camera project viable? : "Thanks xose! I love that setup, it looks so rugged! I've been doing some research on how to power the pi with solar. Is the plaque in the upper ri..." | Read more » 2 days ago edie_blues commented on What do you think about this new design sketch for a Welcome page? : "Hello again @warren :) Two quick questions: is it possible to upgrade my account to a moderator so that I can publish a wiki (see above)? any pr..." | Read more » 3 days ago xose commented on Is a Water Proof Solar Raspberry Pi Camera project viable? : "Hi Icarito. The project we're working with the witty pi energy manager is this. The case was made with a PVC tube and an external solar panel. Af..." | Read more » 3 days ago shanlter commented on Microscope Webcam Conversion : "Thanks @warren, finally I bought at taobao with the price of 1.7USD each. I think you have a pretty good price for US! " | Read more » 3 days ago mathew commented on Airpup: designing a kite balloon : "@Ag8n Yes, the Jalbert Kytoons! I covered them and a few other historical kite balloons here: https://www.headfullofair.com/post/what-is-a-kite-bal..." | Read more » 4 days ago Ag8n commented on What type of aerosol was used for the calibration of the purpleair lasers? : "The purple air monitors have a low r2 value for the pm10 testing. This may lead to the skewing that you are talking about. I corresponded with th..." | Read more » 4 days ago guolivar commented on Does particle composition that the purple air monitors measure greatly skew the data output? : "Following on @jeffalk answer, please expand on your question. In my opinion (and I've worked in aerosol science for a number of years) the main poi..." | Read more » 4 days ago guolivar commented on What type of aerosol was used for the calibration of the purpleair lasers? : "As far as I know Plantower hasn't disclosed that (to be fair, I don't think any of the low-cost manufacturers has done either). From the field test..." | Read more » 4 days ago exekutive commented on UV measurements : "Are there any materials which fluoresce only under a fairly narrow band around 365nm? " | Read more » 4 days ago kramadan commented on Outreachy proposal: Planning for expanded community stats system : "Hello! https://github.com/publiclab/plots2/issues/3893 " | Read more » 4 days ago mblumhar commented on Can anyone provide direction for technical problems using the lego spectrometer thanks : "Regular USB webcam works with the raspberry pi so that is another work around. I will find another use for the pi camera. I am happy to support Pu..." | Read more » 4 days ago jeffalk commented on Why are the PM10 particles of the Purpleair monitor biased so high? : "I'd appreciate learning what in the document you referenced indicates to you that the PM10 is "biased rather high". Thanks " | Read more » 5 days ago jeffalk commented on Does particle composition that the purple air monitors measure greatly skew the data output? : "Hi. Given that you mention "silica" and you are at UW Eau Claire ( western wisconsin sand mining...) I take your question to really ask whether on..." | Read more » 5 days ago Cbarnes9 commented on Why are the PM10 particles of the Purpleair monitor biased so high? : "I found the information about the 640 nm wavelength lasers quite interesting, thank you. I have been in communication from people from Lane Regiona..." | Read more » 5 days ago