| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| cfastie | "That's a good question about the DVD plastic fluorescing. I don't know of anyone who has raised that question about the Public Lab spectrometers. I..." | Read more » | over 6 years ago | |||
| warren | "Hi! Here's a good place to post questions about fluorescence: https://publiclab.org/wiki/oil-testing-kit#Questions Or, just at https://publiclab.o..." | Read more » | over 6 years ago | |||
| warren | "Hi, there's been a lot of work on fluorescence and there's still a lot to do -- you can read up at #fluorescence - and on this page: https://publi..." | Read more » | over 6 years ago | |||
| ICSK | "Does the diffraction slit that is offered also fluoresce? Any other thing I might not be thinking of for measuring fluorescent responses? Only par..." | Read more » | over 6 years ago | |||
| neilh20 | "Very interesting. A new board from seeed is intriguing- though a bit pricey - seems like it could be turned into an auto-monitoring system. https:/..." | Read more » | over 6 years ago | |||
| maltheR | "Thanks for the info... I was looking for it myself.. And big up for your photos, sir.. " | Read more » | over 6 years ago | |||
| yusufm | "Flourescence is not very bright nor too low (depends how much dye i inject), emission in green band, might last few 10s of ms. " | Read more » | over 7 years ago | |||
| cfastie | "How bright is the fluorescence? What color, and how long does it last? Do you shine a light on the leaves to make them fluoresce? What color? How l..." | Read more » | over 7 years ago | |||
| warren | "Hi - i wonder if @gbathree may have some insights into this -- the #multispeq may be a way forward on this? " | Read more » | over 7 years ago | |||
| phil3D | "@phil3D awards a barnstar to mathew for their awesome contribution! " | Read more » | over 7 years ago | |||
| jakemartin | "A L2F is a light to frequency converter. This would work for any fluorescing oils such as crude oil. To distinguish them you would need to look a..." | Read more » | almost 8 years ago | |||
| warren | "Wow, this sounds very cool! What's an L2F detector? Would this work for other fluorescing oils and would it be likely to be able to distinguish the..." | Read more » | almost 8 years ago | |||
| dhaffnersr | "It's me again Jeff, Dave H, sorry I posted the wrong graph i made, this is the right one " | Read more » | about 8 years ago | |||
| dhaffnersr | "Hey Jeff, I use spekwin32 for all my spectral data processing, first here are 2 references that may help you https://www.researchgate.net/topic/uv..." | Read more » | about 8 years ago | |||
| warren | "Hi, Dave - what is the tell-tale hump? Do you mean from the LED input light? If so, it's at 398nm, not 385nm. What processing did you do? " | Read more » | about 8 years ago | |||
| dhaffnersr | "Hey Jeff, I saw your spectra of the nail polish machine and there it is the tell tail "hump," so I exported it and processed it and here is what it..." | Read more » | about 8 years ago | |||
| dhaffnersr | "Hey Dave, well I was thinking along the lines of when I built a wind speed indicator with a small dc motor and LCD screen attached and calibrated i..." | Read more » | about 8 years ago | |||
| stoft | "Unfortunately, LED wavelength does not change with applied voltage or current -- their center peak wavelength is not variable or controllable and P..." | Read more » | about 8 years ago | |||
| dhaffnersr | "Hey Jeff! Sure I'd be happy to test any LEDs you want to send. I do want to throw an idea your way, I think using the higher wavelength LEDs are st..." | Read more » | about 8 years ago | |||
| stoft | "Sure ... what's the LED's packaging style/type? SMD, leaded, ...? " | Read more » | about 8 years ago | |||
| warren | "@dhaffnersr and @stoft, if you'd like I could send you the lower-wavelength LEDs as well for comparison testing? " | Read more » | about 8 years ago | |||
| warren | "@briandegger @jeffh - thanks for the tips on LED sourcing! Thought you'd enjoy seeing this. " | Read more » | about 8 years ago | |||
| dhaffnersr | "Hey Jeff, I thought I had some high brightness LED's, I can't find them right now but I did have a RED LED clear top 1.7v@20mA 3000mcd@ 12deg viewi..." | Read more » | about 8 years ago | |||
| warren | "Ok, this is getting a little out there, but I'm going to buy and try a few other products; I see $3.84: http://www.ebay.com/itm/201481504603 $3..." | Read more » | about 8 years ago |