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Product WIG-08627 | about 2 years ago

Had similar problems to a number of others with logomatic not reading the SF.SFE file.
It turned out the problem was the SD card format.
Reformatting the card using the formatter at http://www.sdcard.org/consumers/formatter/
and selecting “resize card” which sets the format size to an exact clyinder boundary fixed the problem.

Product SEN-09623 | about 2 years ago

Am using this board to make a flight logger for gliders flying aerobatics (full size gliders).
Just wanted to say am impressed so far by the board.
Have completed the initial firmware to allow calibration of the board accelerometers and the results are as good as much more expensive IMU’s. Have not finished the gyro cal routines yet but some quick tests show drift rate after initial bias correction to be below 1deg/min.
A real bargin compared to some of the $1000+ units once it is correctly calibrated.
Example accuracy of board after 14 point1G tumble cal)
Offsets
-15.171142 -7.42442 25.0406
Calculated axis misalignments (degrees)

X= 0.066 Y=-1.094 Z= 0.358

Max X Error 5.479 at cal pos 9 (0.558%)
Max Y Error 4.096 at cal pos 13 (0.418%)
Max Z Error 7.242 at cal pos 5 (0.738%)
Total error using 14 positions 95.098 ave error 2.264

Tutorial - LPC2148 USB Bootloader Tutorial | about 2 years ago

Had similar problems to a number of others with logomatic not reading the SF.SFE file.
It turned out the problem was the SD card format.
Reformatting the card using the formatter at http://www.sdcard.org/consumers/formatter/
and selecting “resize card” which sets the format size to an exact clyinder boundary fixed the problem.