| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| cfastie | "I have not tried MAPS.ME. It looks like it allows you to save base map data to your phone while you have a data connection, and then display the ma..." | Read more » | almost 7 years ago | |||
| cfastie | "I can't tell from the photo what kind of filter your camera has. My guess would be that it is a blue filter, so the red channel would be mostly NIR..." | Read more » | almost 7 years ago | |||
| cfastie | "Ah, I see. Those keywords, DATE and TIME, refer to the time the sketch was compiled and are saved on the Arduino until a new sketch is loaded. Tha..." | Read more » | almost 7 years ago | |||
| cfastie | "Liz is correct. Most smartphones have very good GPS hardware. If you take a photo at a sampling location, that photo should have location coordinat..." | Read more » | almost 7 years ago | |||
| cfastie | "Those battery eliminators are legitimate products. Canon makes them for some of its PowerShots. The AC to DC converter takes wall power and deliver..." | Read more » | almost 7 years ago | |||
| cfastie | "Point and shoot cameras typically last a few hours when running on batteries. Trail cameras typically last a few months to a year because they ente..." | Read more » | almost 7 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 » | almost 7 years ago | |||
| cfastie | "Although the full range of near infrared transmission of the Rosco 19 filter has not been measured (by anyone we know about ), we are not without t..." | Read more » | almost 7 years ago | |||
| cfastie | "The spectral response graphs supplied by Rosco don't go past 740 nm. So we are assuming that there is some transmission farther into the near infra..." | Read more » | almost 7 years ago | |||
| cfastie | "I guess the method would be deriving NDVI from inexpensive sensors (not cameras) operated by a microcontroller. There might be a better sensor (or ..." | Read more » | almost 7 years ago | |||
| cfastie | "I've made a couple of those I2C hubs and they are very handy. They're fun to make too. I now put a little super glue between the header plastic bef..." | Read more » | almost 7 years ago | |||
| cfastie | "Do you think i need the targets of known spectral reflectivity in the same bands that will be used to compute NDVI or it can be tested with any mat..." | Read more » | almost 7 years ago | |||
| cfastie | "Rosco 19: https://publiclab.org/notes/mathew/04-29-2014/a-wratten-25a-replacement-from-rosco Rosco 2007: http://legacy.rosco.com/filters/SED.cfm?t..." | Read more » | almost 7 years ago | |||
| cfastie | "That would be terrific if a ferrite bead eliminated the noise I was seeing. My impression was that the bead was protection against radio frequency ..." | Read more » | almost 7 years ago | |||
| cfastie | "Thanks Ed, It's good to know there is hope for the Nano. That's an excellent thread you linked to. I might try removing the LED resistor and the r..." | Read more » | almost 7 years ago | |||
| cfastie | "Xose, Thanks for pointing to those Grove I2C hubs. I had been pondering how to fork the I2C line. Here is my attempt to make an I2C hub from male h..." | Read more » | almost 7 years ago | |||
| cfastie | "I figured out what I was doing wrong with the real time clock. This line in a sketch: RTC.adjust(DateTime((__DATE__), (__TIME__))); will set t..." | Read more » | almost 7 years ago | |||
| cfastie | "A nice thing about DuPont jumper wires is that each wire has a separate connector. So pin pitch does not matter (if it is at least 0.1 inch, the Ar..." | Read more » | almost 7 years ago | |||
| cfastie | "That's a nice little I2C hub. Maybe it would be easy to make something like that for DuPont wires from strips of male header: But somebody would..." | Read more » | almost 7 years ago | |||
| cfastie | "Are you storing data in RAM on the Pi? In a RAM drive? Do these data persist after the Pi is powered down? Is this Pi always connected to a compute..." | Read more » | almost 7 years ago | |||
| cfastie | "Can you share an example of your spectra? Are they on Spectral Workbench? What spectrometer did you use? Are you interested in a more precise scal..." | Read more » | almost 7 years ago | |||
| cfastie | "This is a really intriguing project. The Seek camera makes possible a lot of otherwise very difficult investigations. It should be straightforward ..." | Read more » | almost 7 years ago | |||
| cfastie | "It appears that storing data in flash memory on an Arduino is not so easy. The PROGMEM keyword only works for writing constants before the main lo..." | Read more » | almost 7 years ago | |||
| cfastie | "It seems that it might be straightforward to store arrays of data in the 32k of flash memory in a 328p chip. Flash memory is non-volatile and your ..." | Read more » | about 7 years ago |