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About
About Me:
Software Engineer
Please tell us a bit about your UAV interest
VTOL? who knows...
Activity Feed
"Adam-
Check out my other post: http://diydrones.com/profiles/blogs/magnetic-declination-and?xg_sou.... It has the source code. Some folks asked some good follow-up questions, so check the comments, too :)
I'm on vacation, so I won't be able to dig…"
Check out my other post: http://diydrones.com/profiles/blogs/magnetic-declination-and?xg_sou.... It has the source code. Some folks asked some good follow-up questions, so check the comments, too :)
I'm on vacation, so I won't be able to dig…"
"Jack- Could you elaborate? Errors are not necessarily bad as long as they are quantifiable, right? What I think we want to avoid is treating tilt-compensated yaw values from small and high inclinations with the same level of confidence in their…"
"Great feedback, Doug! I am re-running the table creation with a 0.1 degree grid this time. Also, could you share the coordinates of such a disturbance? I'd be interested if either the IGRF11 or the WMM2010 take these into account. You can try…"
(image from http://www.ngdc.noaa.gov/geomag/WMM/image.shtml) Hi folks!I decided to implement an on-board declination calculator based on geographic location and I'd love to get some feedback. It takes up about 1400 flash bytes in total for a 3…
"Randy, thanks for the guidance. Fortunately, I had guessed correctly and was already adding support to that area once Chris pointed me to the APM 2.0 trunk. The tricky part is that DataFlash and AP_Compass_MicroMag3 are going to have to share the…"
"Great feedback guys! I'm going to play around with the data some to see what kind of size/accuracy tradeoff I can get. It looks a lot more doable if we limit ourselves to inhabited latitudes (80 N -> 55 S) as we avoid the magnetic poles."
"Thanks for the pointer, Chris! I'm sync'd into the SVN repository now. (Still have to figure out the build process, but I'm getting closer! :)
Bill's paper was very interesting. I had originally assumed that I would have to dynamically compensate…"
Bill's paper was very interesting. I had originally assumed that I would have to dynamically compensate…"
bGatti recently made a post that got me thinking: given the plethora of information captured during logging manual flights, could one run a post-analysis (a bunch of linear regressions?) to infer the in-flight characteristics of a plane. Then the…
"@Randy - Will do next time I dig into the guts of my plane."
Hi folks - this is by first blog post here, so let me know if I'm commiting a faux pas in any manner :)I've decided that the compass support on ArduPilotMega needs beefing up. I'm working on this in a few ways:1. Added MicroMag3 support - this is…
"I certainly like the thinking, but I'm pretty sure it's much more complicated than that. However, as you say, the data will (or will not) show the relationship :)
"at a given RPM, power consumption is proportional to airspeed" - only if you are…"
"at a given RPM, power consumption is proportional to airspeed" - only if you are…"
"@Randy All I can say in regard to analog vs. PWM is what I've seen anecdotally on my sensor. I can do a test program that collects both at the same time to see if the noise is from the sensor or from how it's read. I just figured I'd through in my…"
"Update: I've got the compass working and I've think I've got a simpler solution for SPI sharing as long as devices are not asynchronous.
I'll add the info later as I have to go to my real job now :)"
I'll add the info later as I have to go to my real job now :)"
"That's really too bad they dropped PWM support on the AE line.
Perhaps I am the only one have noisy ADC with the Maxbotix, but I switched the code to use the PWM output and I've found it to be significiantly more reliable and then I also don't have…"
Perhaps I am the only one have noisy ADC with the Maxbotix, but I switched the code to use the PWM output and I've found it to be significiantly more reliable and then I also don't have…"
Hi folks-I'm looking to save a few bucks and reuse my MicroMag3. I'm looking to add the support myself, but wanted to get some feedback before I get in too deep :) Game plan:1. MicroMag3 is SPI which means it will have to share with DataFlash…
"Woohoo! Fixed it. In case others see this issue, for me there was solder that shorted together pins 11 and 12 on the Atmel. 11 is ground and 12 is RX2 which is how the ADC sends data back to the Atmel. Once I broke the solder bridge things worked…"
