Post Created date
Gyros
There are some "higher grade" MEMS that might be suitable *at constant temperature*, with a bias instability of 1-5 deg/hr ( == 0.0014 - 0.000277 deg/s). White noise dominates,...
Sunday, 11 March 2012 - 00:39
Gyros
AgwanII wrote: For next project I need to measure quite low angular rates, so it seem these gyros are on the limit on beeing good enough for it. Might work, might not. Can you...
Saturday, 10 March 2012 - 13:33
Source code revision control
alank2 wrote: Is the added complexity of a SVN and backing it up, keeping track of its database, etc., worthwhile? Perhaps I just don't know what I am missing... Without doubt...
Saturday, 10 March 2012 - 08:28
accelerometer to roll and pitch
Dave67 wrote:Thanks Damien - that all makes sense I was wondering whether the error varies with the angle too in some simple trig relationship, since error seems to dramatically...
Friday, 9 March 2012 - 09:28
accelerometer to roll and pitch
meslomp wrote: If I then use those pitch and roll values to calculate heading (I also have a 3d magneto onboard same direction setting) as long as I keep my self made board flat...
Friday, 9 March 2012 - 09:27
accelerometer to roll and pitch
The second part is what sort of errors to expect. I will talk in mg (milli-g's or one one-thousandth the acceleration due to gravity = 9.81 / 1000). The dominant errors for low-...
Wednesday, 7 March 2012 - 12:43
accelerometer to roll and pitch
Dave67 wrote:One other quick question: Using a 3 axis accelerometer & coarse levelling as a Clinometer works for roll or tilt of -90 to +90 degrees, but as the tilt approaches...
Wednesday, 7 March 2012 - 12:41
Source code revision control
+1 Subversion. Multi-platform. Free. Easy to use. Pick any three! (Seriously, even our non-technical people use it at work!) -- Damien
Monday, 5 March 2012 - 20:49
Floating point design help needed
bobgardner wrote:Koshchi: I think all floats and doubles that get read into the 387 are extended to 80 bit. Using the x87 (FPU) the internal accumulator is 80-bits, though you can...
Wednesday, 29 February 2012 - 10:20
accelerometer to roll and pitch
Dave67 wrote: 1) To restate my last question from the previous post, what can I realistically measure with just one 3-axis accelerometer? a) Attitude over a limited range? b) Tilt...
Wednesday, 22 February 2012 - 12:53
Anybody know what the big Atmel Xmega announcement is?
lfmorrison wrote:The current project-of-the-day on my plate, involving an ATxmega128A1, actually uses 6 of the 8 USARTs, all 4 DMA channels, most (maybe all -- I'd have to check)...
Sunday, 19 February 2012 - 12:47
Getting Standard Deviation from Noise Density
KitCarlson wrote:Here is a a good youtube from ADI on how to convert SD to RMS. http://www.youtube.com/watch?v=y... +1 Video :) BUT accelerometers are special beasts. Whist the...
Sunday, 19 February 2012 - 12:35

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