| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| Fernmoss | "Can a 405 nm led be used to visualize heating oil stains? " | Read more » | almost 3 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 7 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 » | over 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 » | over 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 » | over 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 » | over 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 » | over 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 » | over 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 » | over 8 years ago | |||
| stoft | "Sure ... what's the LED's packaging style/type? SMD, leaded, ...? " | Read more » | over 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 » | over 8 years ago | |||
| warren | "@briandegger @jeffh - thanks for the tips on LED sourcing! Thought you'd enjoy seeing this. " | Read more » | over 8 years ago | |||
| warren | "More assembly innovations and simplifications; new note and design coming soon: " | Read more » | almost 9 years ago | |||
| warren | "Made the last couple changes -- flipped the tab holes on the bottom flaps, rounded the side bottom flaps: cuvette-frame-9.pdf " | Read more » | almost 9 years ago | |||
| warren | "Another update with the tuck-in flaps, slits, and the USB hole and the indexing hole for the potentiometer (although that may be premature). The de..." | Read more » | almost 9 years ago | |||
| warren | "Oh, reference for the pinouts on the 3.3v Trinket: https://learn.adafruit.com/introducing-trinket/pinouts " | Read more » | almost 9 years ago | |||
| warren | "I figured out the problem with reprogramming -- the pin I'm using for the potentiometer is also used for USB on the Trinket. Oddly, I can get it to..." | Read more » | almost 9 years ago | |||
| Matej | "Great Work! :-) " | Read more » | almost 9 years ago | |||
| liz | "Oh hey Cort! Great to see your work again! " | Read more » | almost 9 years ago | |||
| warren | "OK, I apparently burned out my Trinket somehow, because I can't re-upload; but i have a 2nd one. I uploaded the latest version of the sketch (which..." | Read more » | almost 9 years ago | |||
| warren | "I was able to upload the sketch, but it only changes once per second -- i was hoping for a smoother change, and I'm also not sure it's ever outputt..." | Read more » | almost 9 years ago | |||
| warren | "So awesome, thanks Cort! I modified your code for the Trinket and put it on Codebender.com, using pin #4 (analog pin 2) for the potentiometer and p..." | Read more » | almost 9 years ago | |||
| dhaffnersr | "That is just too cool Jeff! " | Read more » | almost 9 years ago | |||
| warren | "Just notes to self; i want to: make the top hole with a swinging flap, for light control redesign the stack to incorporate the LED, Trinket, and ..." | Read more » | almost 9 years ago |