| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| stoft | "What I've read is that the RPi camera used to use the OV5647 camera chip but has "upgraded" (changed chips) to a Sony IMX 219 PQ CMOS image sensor ..." | Read more » | about 8 years ago | |||
| stoft | "Jeff, I inserted the component details in the note above, just before the plots. As to the RPi camera, it seems to have two "difficulties" which n..." | Read more » | about 8 years ago | |||
| stoft | "Jeff, yes, the data is being collected, and yes, higher resolution does improve observation of detail like slit differences. I'm evolving some new ..." | Read more » | about 8 years ago | |||
| stoft | "Jeff...Actually, looking at the 'Unreinforced' 'Green' peak wavelength shift, the span is 537-549nm (the same peak in the 'reinforced' version is 5..." | Read more » | about 8 years ago | |||
| stoft | "I'd guess that it's just the collection and comparison of key measurements extracted from the spectra which may result in 'sensitivity' estimates. ..." | Read more » | about 8 years ago | |||
| stoft | "Jeff - hands-on experiences are usually helpful even if incomplete. You could tinker with the paper-n-tape process even if there are not enough hou..." | 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 | |||
| 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 | "@warren, I didn't see you comment about a draft of test types for replication experiments so I just posted them at the end of this published note o..." | Read more » | about 8 years ago | |||
| stoft | "@warren, I'm not sure I follow the linking details for grids etc., but more abstractly, a tree structure comes to mind. This note describes one com..." | Read more » | about 8 years ago | |||
| stoft | "@warren, the black ink looks quite dark in the photo and seems easy to apply. Hope it cures well. I believe the primary factors are 1) the black c..." | Read more » | over 8 years ago | |||
| stoft | "@abdul, ok so we've just differentiated the [1] and [2] kits; the option [1] should ship thin, paper only with no 'solid' materials other than the ..." | Read more » | over 8 years ago | |||
| stoft | "Interesting thought. I'll suggest using blue and red LEDs which then allows monitoring apparent wavelength shifts as well (when slit and camera or ..." | Read more » | over 8 years ago | |||
| stoft | "@abdul, interesting observations .... so here's a starter list. [0] Folding Vers (Cute, zero-cost, spectrum concept), [1] Paper Vers (Functional, l..." | Read more » | over 8 years ago | |||
| stoft | "@warren, nice to see a design from the West suddenly appear in the East! Sneaker-net variant of NC machining; hope the design actually works for yo..." | Read more » | over 8 years ago | |||
| stoft | "@mathew, good thoughts. I'm technical but from experience I see the need to include the market, user, next-bench, test, manufacturability, environm..." | Read more » | over 8 years ago | |||
| stoft | "@abdul, I'd not consider superglue because of it's negative properties for human skin -- a safety hazard. Remember, the kits are sold for education..." | Read more » | over 8 years ago | |||
| stoft | "The size of the 'square' parts is close to 0.5-in but the "ideal" value is set by the "height" of the camera lens after the camera is mounted. The ..." | Read more » | over 8 years ago | |||
| stoft | "Except ..... there is a real advantage of using the "yellow" "woodworkers glue", rather than white glue. "White glue" seems to be sold in different..." | Read more » | over 8 years ago | |||
| stoft | "@stef, Thanks for your observations; glad to see the creative spirit alive and well. Here's a link to a note (which includes two other links) about..." | Read more » | over 8 years ago | |||
| stoft | "I added a comment; I think that at this abstract level, the assumption of conceptual mode is fairly implicit. The entire post is focused on proposi..." | Read more » | over 8 years ago | |||
| stoft | "Done. " | Read more » | over 8 years ago | |||
| stoft | "Thoughts: 1 - Splash-resistant, maybe, (there are holes), 2 - Masonite does not cut nicely, 3 - Acrylic (even laser-cut) tends to have very sharp e..." | Read more » | over 8 years ago | |||
| stoft | "At the risk of missing his points, it sounds like @david-days is suggesting PLab might be described by (no particular order or emphasis) 1) enviro..." | Read more » | over 8 years ago |