Last year, we used this sensor and it worked reliably. To wire it, we used a low pass filter to average the PWM signal. There are instructions to build the filter on page 18 of the datasheet here:
http://ams.com/eng/Products/Position...ensors/AS5145B
Do note that when used in this way, the sensor outputs a value proportional to it's absolute position, so it can be used like a potentiometer. For us this was perfect as we were not counting number of rotations, but rather what angle the shaft was within a rotation.
The pinouts are on page 4. +5v is pin 16, and Gnd is pin 7. We wired these to the digital sidecar last year, but I think you can wire them right to the DIO on the RoboRio.
I'm sure FIRST did the math. They always do the math. Just not math humans use. It was probably given to them from NASA from the aliens so we'd quit predicting the divisions before they release it. - Koko Ed [more] 
21-01-2015, 14:53
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