Re: Duty cycle - Another Math dilemma
Hi Ed,
Is the dutycycle at various temperatures repeatable? I mean, you say that 0° at 72F is 4993 and 0° at 65F it's xxxx, are those numbers repeatable from time to time or is 4993 one time and 5006 another?
If they are repeatable then all you need is a temperature sensor (which I suspect you have anyway) and a bit of more math....
Mount the tempsensor in very close proximity to the accelerometer, set the accelerometer exactly level and leave it there. Then, using a hairdryer or whatever measure and plot the dutycycle vs temperature over the range you expect to use it and see what comes out. If you're lucky you'll get a linear realationship between temp and dutycycle which is very easy to compensate for in software. If it's not a linear relationship that too can be compensated for - not as easily though.
If you're very amibitious repeat the test at 30° tilt and see if the relationship is the same.
/Henrik.
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