| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| warren | "Hi, Dave - we're doing some work on this now -- I don't think we have enough spec kits to do the paper-n-tape version here, but we are trying to cr..." | Read more » | about 8 years ago | |||
| stoft | "Thanks Jeff; understood. I'm presently working on a higher resolution P-4 spectrometers (including monochrome) so might find a spot for comparison ..." | Read more » | about 8 years ago | |||
| warren | "Also -- perhaps there could be a comparison of spectra with air gap vs. film gap... and to test your build, you might ask people to post a before/a..." | Read more » | about 8 years ago | |||
| warren | "I like this a lot! I'd try it out but I'm inclined (myself) to take things slowly -- I want to boost replications/builds on the other upgrades you'..." | Read more » | about 8 years ago | |||
| stoft | "@warren, I posted some draft note on testing to: https://publiclab.org/questions/stoft/09-15-2016/what-mechanical-specs-can-and-should-plab-spectro..." | Read more » | about 8 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 8 years ago | |||
| stoft | "@Warren, thanks for the suggestions. Take a look (above) at the two new plots which replace the one(s) you referenced. You're right, the new ones m..." | Read more » | over 8 years ago | |||
| warren | "Great post! I love how you so clearly stated some of the conclusions. A few thoughts: maybe I missed this, but to @viechdokter's comment, are th..." | Read more » | over 8 years ago | |||
| stoft | "Or, they are all 'bad' (noisy) to some degree ;-) The sharpness of the peak is still mostly a factor of slit, mechanical rigidity, being light-tigh..." | Read more » | over 8 years ago | |||
| viechdokter | "Looks like at least there are no "bad" pixels as they all show about the same amount of noise. The time averaging seems to achieve a very sharp-pe..." | Read more » | over 8 years ago | |||
| stoft | "Actually, you need several additional pieces for SWB: 1) average 3-5 parallel lines, 2) monitor stability and take data until it IS stable or times..." | Read more » | over 8 years ago | |||
| stoft | "Ideally, the user would select a "stable" ('smooth' or 'broad peak') region to monitor and then the software would take samples (and average) while..." | Read more » | over 8 years ago | |||
| warren | "Excellent; so we'll think about timeframe plus # of samples. I think we could prompt people in the interface to "ensure stable reading" during a fe..." | Read more » | over 8 years ago | |||
| stoft | "Yes, I'd agree that time averaging would help and, if possible, it sould be the default to reduce this noise component. I do not have 30 fps data, ..." | Read more » | over 8 years ago | |||
| warren | "Great analysis. Based on this, I wonder if we should more strongly encourage people to do live capturing, and to have a time averaging default sett..." | Read more » | over 8 years ago | |||
| stoft | "Mathew, thanks. It's an interesting technique, though not without some added work to characterize a diffusion surface and assure bulb stability. I ..." | Read more » | almost 9 years ago | |||
| mathew | "@stoft @warren @gretchengehrke I was digging through some notes and saw this old post. thought you might be interested " | Read more » | almost 9 years ago | |||
| liz | "This is great! 20 people replicated this construction in Cuenca, Ecuador by printing out their own on heavy black paper. " | Read more » | about 9 years ago | |||
| warren | "I have a bright LED on order (arriving tomorrow) and the bolt spacers, mentioned in this note: https://publiclab.org/notes/warren/11-30-2015/bolt-a..." | Read more » | about 9 years ago | |||
| warren | "Hmm, how did you use your white front bike light to calibrate? Surely it's not a compact fluorescent bulb? " | Read more » | about 9 years ago | |||
| MelissaN | "I wonder, for usability, if the V piece and the M-folded piece can have slits for the attenuator in both sides as well as their being an extra cuto..." | Read more » | about 9 years ago | |||
| warren | "For the L-shaped part in figure 5, I'm curious to hear @stoft's input - I'd like to see some kind of more rigid connection between the piece that h..." | Read more » | over 9 years ago | |||
| warren | "Hi, Yagiz! Awesome. Can you share some dimensions of the DVD holding part so we could come up with a vector design to add to the repository? https:..." | Read more » | over 9 years ago | |||
| warren | "Awesome. This went well, although unlike the laser cutter, my Silhouette cutter doesn't remove material, so the V-shaped piece didn't quite fit. If..." | Read more » | over 9 years ago |