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Re Direction Indicator Needs

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dlj04(at)josephson.com
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Posted: Wed Jun 11, 2014 10:12 am Post subject: Re Direction Indicator Needs

MGL also makes 2-1/4" and a 3-1/8" round-hole-mount displays for their 

AHRS and compass modules. It's about $1300 for attitude, TC and DG, or 

$500 for direction only, including the sensors.



It would be up to you to be certain that these are equivalent to 

gyroscopic instruments. The sensors don't contain spinning masses but 

sense acceleration and attitude with multiple single-axis vibrating 

structures instead. The basic sensors are quite cheap; you can get a "10 

degree of freedom" sensor module on a pc board for under $12 which 

includes 3 axes each of attitude, acceleration and magnetic field plus a 

barometric pressure sensor. Computations that used to take 30 pounds of 

synchros can now be done with a Kalman filter running on a fifty cent 

microcontroller chip.

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