Community research

warren commented on GSoC with Public Lab: First Evaluation almost 6 years ago

Looking forward to our next big challenge! :-)

warren commented on GSoC with Public Lab: First Evaluation almost 6 years ago

Gaurav! What a great post and we are indeed lucky! 😄

troyb commented on Why do raw RGB values differ from calibrated RGB values? I thought calibration just set pixels to wavelength (nm)? almost 6 years ago

So, to clarify: what I'm saying is that there seem to mathematical artefacts in the calibrated in...

stoft commented on Why do raw RGB values differ from calibrated RGB values? I thought calibration just set pixels to wavelength (nm)? almost 6 years ago

Also, 5 - Use 'absolute' measurement values when mathematically comparing amplitude of spectra --...

stoft commented on Why do raw RGB values differ from calibrated RGB values? I thought calibration just set pixels to wavelength (nm)? almost 6 years ago

Ok, visualizing the spectra helps. 1 - The calibration (wavelength calibration using a CFL source...

troyb commented on Why do raw RGB values differ from calibrated RGB values? I thought calibration just set pixels to wavelength (nm)? almost 6 years ago

Also, I didn't save any spectra with saturated channels that I recall, but the recent spectrum ht...

troyb commented on Why do raw RGB values differ from calibrated RGB values? I thought calibration just set pixels to wavelength (nm)? almost 6 years ago

Ah, the table makes the values hard to see. Note for instance that a raw value of 10 scales to 7....

Tomas0413 commented on an answer about Dark images, can't get spectrometer to work almost 6 years ago

I can't edit the previous comment, I get an error when I try. This is what I wanted to post: ech...

Tomas0413 commented on an answer about Dark images, can't get spectrometer to work almost 6 years ago

I can confirm that this tuned activity LED on Pi Zero off: #echo none | sudo tee /sys/class/leds...

Tomas0413 commented on an answer about Dark images, can't get spectrometer to work almost 6 years ago

OK! Maybe it's possible to just disable LED via software: https://www.jeffgeerling.com/blogs/jef...

Pushpaw commented on an answer about Dark images, can't get spectrometer to work almost 6 years ago

My experience is that blocking all the light from a LED indicator is a lot harder than you might ...

nanocastro commented on What is the correct AQI measure ? almost 6 years ago

Hi @sagarpreet nice work. I think is better to leave the PM2.5 value because the AQI refers to a...

nanocastro commented on an answer about What is the correct AQI measure ? almost 6 years ago

Hi @sagarpreet nice work. I think is better to leave the PM2.5 value because the AQI refers to a...

nanocastro commented on an answer about What is the correct AQI measure ? almost 6 years ago

Hi @sagarpreet nice work. I think is better to leave the PM2.5 value because the AQI refers to a...

Tomas0413 commented on an answer about Dark images, can't get spectrometer to work almost 6 years ago

Hmm! Interesting point. I didn't think about the flashing LEDs! But thinking about this, it shoul...

stoft commented on Why do raw RGB values differ from calibrated RGB values? I thought calibration just set pixels to wavelength (nm)? almost 6 years ago

Could not find the actual spectra from the info provided. How about an explicit link or post the ...

Bronwen commented on How do I get the files for the 3D fan duct? almost 6 years ago

Great! Glad it worked out. We'd love to see how your project comes together, it looks like a real...

the_butler commented on What is the correct AQI measure ? almost 6 years ago

This is interesting. What unit is PM2.5 in? If it's ug/m3 then I think it's best to not change it...

the_butler commented on How do I get the files for the 3D fan duct? almost 6 years ago

Hi @bronwen. I initially asked a 'question', but then realised the commenting function was easier...

warren commented on What is the correct AQI measure ? almost 6 years ago

I wonder if @marlokeno, @nanocastro, @imvec, @xose, @zengirl2, @JamesWarren, @the_butler, @guoliv...

sagarpreet commented on What is the correct AQI measure ? almost 6 years ago

I used the formula given on the pic above 😀 . Now the heat map looks like this :

sagarpreet commented on What is the correct AQI measure ? almost 6 years ago

Thank you :)

warren commented on an answer about How do I...place the new webcam almost 6 years ago

See if that helps!

warren commented on an answer about How do I...place the new webcam almost 6 years ago

Note how we've put 2-3 pieces of sticky foam under the bottom edge of the camera in the pics @Bro...

warren commented on an answer about How do I...place the new webcam almost 6 years ago

Hm, this looks pretty good. Can you post a pic of the entire setup, including the lamp? I think u...

Bronwen commented on How do I get the files for the 3D fan duct? almost 6 years ago

Hi @the_butler, welcome to Public Lab! I see you've tagged the MACA Open Air Quality Monitor proj...

MaggPi commented on How can you use computer vision to reduce spectral overlap? almost 6 years ago

The comment tries to answer questions above but some still need work: this is definitely a rel...

tmanmerlin commented on How do I...place the new webcam almost 6 years ago

Here is a look at the set up. Maybe you all can tell if this is to far forward or up/down, or a ...

tmanmerlin commented on Can I use a DVD or does it have to be a DVD-R ? almost 6 years ago

Here is a view of my split DVD bottom (clear) and my split DVD-R (purple)

tmanmerlin commented on How do I...place the new webcam almost 6 years ago

Another open air image. I noticed that I can block the direct light to get a black background, a...