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led
led


Author Comment Last activity Moderation
warren "@warren awards a barnstar to Claytonb for their awesome contribution! " | Read more » almost 4 years ago
springem "Hi, new user here. Just got word from my water company that their turbidometer has been going offline for a few months. I'm curious if you have upl..." | Read more » about 4 years ago
programmer1200 "Here is a link to the source but its cheaper to purchase at the actual store , for some reason they $1.71 website and only a $1 in store . https:/..." | Read more » about 4 years ago
warren "Also, do you have a link to the light you used? Do you use a diffuser of any kind with it, or could you in theory dim the light with a filter to ma..." | Read more » about 4 years ago
warren "That sounds amazing. Looking forward to seeing it! " | Read more » about 4 years ago
programmer1200 "Hi @warren that sounds great I'll get one printed out and ready for use and should have it on its way within a few days. Your right about the stand..." | Read more » about 4 years ago
warren "Hi, this is tremendous, we'd love one at the Kits initiative! Could we trade you for some Lego parts? We're curious if you'd be interested in using..." | Read more » about 4 years ago
cfastie "Setting a custom white balance on the Mobius camera can be done numerically. Determining which numbers to use requires trial and error and subjecti..." | Read more » about 5 years ago
suman "Dear Cfastie, Very informative. Thanks for posting. I was interested to know, which method is more preferred and accurate, whi..." | Read more » about 5 years ago
Claytonb "@Thorsten I have not tried using a chart like the color checker though I have used materials(plastic, felt, paper) in the shade of red on the chart..." | Read more » over 5 years ago
Thorsten "@Claytonb great work as usual! Two questions: Have you tried some reddish colors of calibration targets such as the ColorChecker? http://xriteph..." | Read more » over 5 years ago
cfastie "This is a great discovery. It will be good to learn how this color works with a red filter like Wratten 25. I will keep my eye out for Boom Chicka ..." | Read more » almost 6 years ago
cfastie "This is a good example of how the spectrum of incident light influences the NDVI of a scene. Leaves reflect about 10 times more NIR than red, but i..." | Read more » about 6 years ago
aldehyde " I used of Mobius infragam cam (red filter) in Grow Chamber. Light - RED and BLUE (3:1) LED. As I understand this is due to lack of NIR and lot ..." | Read more » about 6 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 6 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 6 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 6 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 6 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 6 years ago
cfastie "I answered Mnzr's question here: https://groups.google.com/forum/#!topic/plots-infrared/HfowVn5ULFM " | Read more » about 6 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 6 years ago
mnzr "@cfastie Hello I'm working on a project in which we see how a person's exposure to plants affects them. Currently we have a wearable sensor with th..." | Read more » about 6 years ago
cfastie "The red filter in your Mobius is blocking most blue light but passing most of the NIR light in the scene. The blue channel receives little other vi..." | Read more » about 6 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 6 years ago