| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| cfastie | "`>> CCS-811 VOC sensors do not need regular calibration or initial calibration, as they use a different technique and not laser-scattering? ..." | Read more » | about 4 years ago | |||
| cfastie | "Here is some new data from a gas sensor. This is a module with a CCS-811 sensor (provides an estimate of total volatile organic compounds [VOC]). T..." | Read more » | about 4 years ago | |||
| cfastie | "The Adafruit VOC sensor module uses a CCS-811 VOC sensor. Modules with these sensors cost about half as much when purchased on eBay from sellers in..." | Read more » | about 4 years ago | |||
| cfastie | "The Arduino snow depth gauge seems to produce good data. It is an ESP8266 and laser rangefinder I2C sensor ($9 total cost). As expected data collec..." | Read more » | about 4 years ago | |||
| cfastie | "The sunlight is not an issue. For a winter-long monitoring goal, a few measurements every day are plenty, and those can be taken at night. With the..." | Read more » | about 4 years ago | |||
| cfastie | "I tried one of those little six dollar laser rangefinders (vl53lox) for measuring distance to snow. Those rangefinders don't work at all in sunligh..." | Read more » | about 4 years ago | |||
| cfastie | "I think a laser rangefinder might work well for this. Put it on a pole and point it downward to measure the distance from the rangefinder to the sn..." | Read more » | about 4 years ago | |||
| cfastie | "Using green foliage (or chlorophyll) to set a custom white balance deserves more consideration than I gave it in my last comment. Foliage absorbs r..." | Read more » | over 4 years ago | |||
| cfastie | "The goal of the custom white balance hack is to fool the camera into wildly exaggerating the brightness of the blue channel (when using a red filte..." | Read more » | over 4 years ago | |||
| cfastie | "If your K610 filter is a cutoff filter that passes wavelengths greater than 610nm and blocks shorter wavelengths, then it is similar to many filter..." | Read more » | over 4 years ago | |||
| cfastie | "`>> for simple bandpass filters, I use the letter "K" followed by the approximate cutoff wavelength Are your filters bandpass filters or cut..." | Read more » | over 4 years ago | |||
| cfastie | "I have not heard of anyone using a microcontroller (Arduino or ESP board) to read data from an SD card. But maybe it is possible. A more common str..." | Read more » | over 4 years ago | |||
| cfastie | "I haven't tried that Feather combination. I have also never seen a list of Feather-Featherwing combinations that are incompatible. So I assume it w..." | Read more » | over 4 years ago | |||
| cfastie | "It looks like the PIC12LF will do what you need. There is also a low power 555 timer (TLC555) but it is not as low power as the PIC12LF. " | Read more » | over 4 years ago | |||
| cfastie | "The TPL5110 depends on getting a signal to the DONE pin, so I am not sure it can just send a pulse every eight seconds. The TPL5111 sets an enable ..." | Read more » | over 4 years ago | |||
| cfastie | "I think NDVI will provide some information about the photosynthetic rate of mosses. Moss leaves capable of rapid photosynthesis will probably be ab..." | Read more » | over 4 years ago | |||
| cfastie | "I'm not familiar with the details, but I think the goal was to protect the sensor from precipitation (the outer can), radiation (the aluminum foil ..." | Read more » | over 4 years ago | |||
| cfastie | "`>>Is it possible to use an NIR sensitive camera to take the image and then use the red and the NIR as two separate copies of the same image ..." | Read more » | over 4 years ago | |||
| cfastie | "`>>So according to this we should be getting about 10% transmission of red light, does that mean I should subtract 10% of each pixel value in..." | Read more » | over 4 years ago | |||
| cfastie | "I don't know for sure whether your protocol with the RPi camera (use automatic white balance with blue paper) and my protocol with a Powershot (use..." | Read more » | over 4 years ago | |||
| cfastie | "I am not familiar with your white balance procedure so I don't know how it is affecting your results. If you can manually set the white balance, se..." | Read more » | over 4 years ago | |||
| cfastie | "This is a fun idea. l assume the bioluminescence will be detected only at night since it will be swamped by sunlight during the day. At night, biol..." | Read more » | over 4 years ago | |||
| cfastie | "That's really useful information. I can see the advantage of having every scientific instrument accessible on the web or network. Being able to rem..." | Read more » | over 4 years ago | |||
| cfastie | "I’m intrigued by the idea that students should “learn the foundational skills with the command line that, in the long run, will make it much easier..." | Read more » | over 4 years ago |