outer_space
Newbie level 5
I want to make an electronic level based on an accelerometer. Is this possible to detect changes of 0.1 degree with an accelerometer?
The problem will be to condition the analog voltage of the axises. The accelerometer shows 0G voltage at 1.25V and 1G at 1.61V. To detect 0.1 degree it will need accuracy of x axis sin(0.1) = 0.0017. It must be able to detect 0.0017 * (1.61 - 1.25) = 0.000612V. With a 10 bit adc I would want to measure between 1.25V +/- 0.1V to achieve 0.1 degree resolution. What kind of problems could I run into? Could this be correctly amplified from 1.25V +/- 0.1V to 0-3.3V with an opamp or something else?
Any suggestions or comments are appreciated.
Best regards,
outerspace
The problem will be to condition the analog voltage of the axises. The accelerometer shows 0G voltage at 1.25V and 1G at 1.61V. To detect 0.1 degree it will need accuracy of x axis sin(0.1) = 0.0017. It must be able to detect 0.0017 * (1.61 - 1.25) = 0.000612V. With a 10 bit adc I would want to measure between 1.25V +/- 0.1V to achieve 0.1 degree resolution. What kind of problems could I run into? Could this be correctly amplified from 1.25V +/- 0.1V to 0-3.3V with an opamp or something else?
Any suggestions or comments are appreciated.
Best regards,
outerspace