spectrum
spectrum


Author Comment Last activity Moderation
batuhanbozuntu " Php Script " | Read more » over 2 years ago
LuckysDraw "Such a great information for me i am a networking businessman thanks. Click Here https://www.luckysdraw.in/ " | Read more » over 2 years ago
warren "Awesome! -- Post to this group at plots-spectometry@googlegroups.com   Public Lab mailing lists (http://publiclab.org/lists) are great for ..." | Read more » almost 4 years ago
msolomon "Thank you both for your suggestions! I have it working now. " | Read more » almost 4 years ago
warren "Hi, I believe this relates to the angle of your camera in the box. If you try to point it further up or down, you should be able to center the spec..." | Read more » almost 4 years ago
Pushpaw "I suspect you have a problem with the vertical alignment of your camera. With the camera that originally shipped with the kit there wasn't room to ..." | Read more » almost 4 years ago
warren "Hi, can you tell us a bit more about what you're doing with this experiment? Welcome! " | Read more » almost 4 years ago
warren "This looks great! Which type of spectrometer did you make, and what type of webcam? " | Read more » over 4 years ago
xose "Hi there! I've been trying to use the spectralworkbench with IOS with no success using Browser app. That web browser is suupposed to use WebRTC but..." | Read more » almost 6 years ago
warren "On iOS, there is the Bowser browser, which I've heard has the correct features to work with Spectral Workbench live recording, but I've never been ..." | Read more » almost 6 years ago
liz "There is no iPhone app, or any app, actually! To capture a spectrum with iPhone, use your camera to take a still picture of the spectra and then up..." | Read more » almost 6 years ago
liz "Hi @CanfieldC ! It's great to meet you. I was the one who organized what i now understand to be your students' work into https://publiclab.org/note..." | Read more » almost 6 years ago
warren "Also - I noticed you're using a compact fluorescent lamp as a light source - but are you measuring absorption? In that case you probably want a bro..." | Read more » almost 6 years ago
cfastie "The sensors in consumer cameras have very low sensitivity at wavelengths shorter that 400 nm. Some cameras are slightly sensitive down to about 380..." | Read more » almost 6 years ago
stoft "Looks like good confirmation of what I observed -- although the clipping does distort the data. Yes, the noise at sample rate is not AGC (that loop..." | Read more » over 6 years ago
viechdokter "@stoft: Yes, the second try suggests it is probably more a noise problem. I will re-do the test very carefully and see what a third data row brings..." | Read more » over 6 years ago
stoft "Hmmm.... The noise appears significant enough that to do amplitude comparisons between filter settings I'd suggest taking at least 3 separate sets ..." | Read more » over 6 years ago
stoft "My guess is that the wavelength transmission curve of the glass (depending on type) softly "rolls off" for shorter wavelengths -- i.e. the glass is..." | Read more » over 6 years ago
viechdokter "The last point would be easiest to test: test a no-brand lamp with the same setup and the same power source and do the same stats on the results. " | Read more » over 6 years ago
warren "Great questions. I do think @stoft is mostly interested in intensity stability for the moment but both are good questions. I'm interested in wheth..." | Read more » over 6 years ago
viechdokter "Yeah I had a look at stoft's post and was very impressed about his orderly and organised way of doing things. I built my spectrometer 3 weeks ago a..." | Read more » over 6 years ago
warren "Wow, this is so great to see very close to @stoft's post: https://publiclab.org/notes/stoft/04-14-2016/spectrometer-stability Were you able to ass..." | Read more » over 6 years ago
viechdokter "Thanx Warren, it's kinda "scary" how nice and positive everyone here on the forum reacts to my musings/problems/requests... Almost looks like you..." | Read more » over 6 years ago
warren "Thanks, I put a few notes to coders in there to try to kick it off. For reference, we def. need help from everyone, coding skills aside -- take a l..." | Read more » over 6 years ago