water-sensing
water-sensing


Author Comment Last activity Moderation
smmontgom "Hi @nshapiro, We started out using computer vision to analyze simple strip tests like you can get at your local hardware store for their ease of us..." | Read more » almost 4 years ago
nshapiro "Interesting! could you post more details on what kind of lead test is used and what your sampling protocol is? thanks! looking forward to learning ..." | Read more » almost 4 years ago
WaterGeek "Nice work. That Arduino sketch (.ino) available? " | Read more » over 4 years ago
Markos "Hi, There are two types of current that can be generated when two conductive materials are dipped into the water. 1- Faradaic current 2- Non Farad..." | Read more » over 4 years ago
Ag8n "I have never met a conductivity meter that doesn't have some amount of drift. Having said that, the commercial conductivity meter at work was a lo..." | Read more » over 4 years ago
MadTinker "Yeah, that seems right. I should have thought thru it a bit more. " | Read more » over 4 years ago
cfastie "I know nothing about this topic, but here is the model I concocted from whole cloth to understand it. Measuring conductivity of water with electro..." | Read more » over 4 years ago
incaking "/* Ph And Temperature Sensing Sample Code * ph meter sensor data reading * real time temperature monitoring Hardware List * 18B20 temperature s..." | Read more » over 4 years ago
shanlter "@shanlter awards a barnstar to incaking for their awesome contribution! " | Read more » over 4 years ago
shanlter "thanks! @incaking!!! 非常详细的说明文档~! 你可以把arduino的程序链接也上传一下吗? " | Read more » over 4 years ago
warren "Hi, this looks awesome! Do you have a link to the Arduino sketch (.ino) file you've used? " | Read more » over 4 years ago
rockets "yes, that's better than mines " | Read more » almost 5 years ago
warren "Hi, @rockets -- maybe refining the title could be helpful here; I hope you don't mind but as I'm an admin, I changed it to How accurate are KnowFlo..." | Read more » almost 5 years ago
rockets "The probe accurate is list below: 1 Gravity: Analog Electrical Conductivity Sensor / Meter For Arduino Operating Voltage: +5.00 V PCB Size: 45 × 32..." | Read more » almost 5 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 » almost 5 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 » almost 5 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 » almost 5 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 » almost 5 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 » almost 5 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 » almost 5 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 » almost 5 years ago
zengirl2 "Glad you posted here as you know I'm a fan of the project. :) " | Read more » almost 5 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 » almost 5 years ago
warren "Just wanted to say this looks really cool! " | Read more » almost 5 years ago