hydroponics
hydroponics


Author Comment Last activity Moderation
liz "indoor or outdoor space? " | Read more » over 6 years ago
Sidney_AstroPlant "Using NIR LEDs seems like a good option to look into and I'm happy to hear that I might not have to deal with extensive filtering! I just got a res..." | Read more » about 7 years ago
cfastie "A simple option might be to turn on some NIR LEDs when the photography happens. The NIR:VIS ratio might not match sunlight, but if you know what it..." | Read more » about 7 years ago
Sidney_AstroPlant "The kit is fully enclosed with LED with a certain blue and red ratio (I have to verify what the exact ratio is). This brings me to the conclusion t..." | Read more » about 7 years ago
cfastie "Thanks for adding a photo. NDVI is based on the assumption that the light illuminating the foliage has a certain proportion of NIR and VIS -- the p..." | Read more » about 7 years ago
cfastie "Using two cameras solves one of the two problems I described (mixed NIR and VIS). That problem can also be solved by measuring or making assumption..." | Read more » about 7 years ago
Sidney_AstroPlant "Thanks Chris for your response. My assumption was that the blue filter supplied with the RPI Noir camera blocks the red channel fully. So you get a..." | Read more » about 7 years ago
Sidney_AstroPlant "Thanks for the positive messages! I see that both of you are active in open source hardware and software initiatives. We are thinking to share our ..." | Read more » about 7 years ago
zengirl2 "Glad you posted here as you know I'm a fan of the project. :) " | Read more » about 7 years ago
cfastie "I haven't used the Pi NoIR cam and have not seen your photos, so I can only respond from general principles. Camera sensors are not as sensitive ..." | Read more » about 7 years ago
warren "Just wanted to say this looks really cool! " | Read more » about 7 years ago
btbonval "Pinoccio is an open source / open hardware solution that makes data collection a breeze. It runs on Arduino and makes everyone's life considerably ..." | Read more » almost 10 years ago
ajawitz "Has there been any movement on the rumored Infragram App for Raspberry Pi? See my recent update about the TSL2561 Digital Luminosity Sensor for so..." | Read more » over 10 years ago
cfastie "This is a pretty interesting investigation. You are breaking new ground in a few areas, so there will be much experimentation to do. For example, I..." | Read more » over 10 years ago
ajawitz "Thank you for this helpful advice! This is exactly what I was hoping to hear! I've edited the research note to include my most recent test result..." | Read more » over 10 years ago
cfastie "I think you are correct that if the only source of light is blue and red LEDs that emit little NIR, the NIR channel in an Infragram camera is goin..." | Read more » over 10 years ago