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[From the last episode: We saw how a gyroscope measures rotation acceleration.] There’s one more sensor we should look at before we take a step back: the magnetometer. This measures a magnetic field. There are lots of ways in which this can be useful, but we’re going to focus specifically […]

[From the last episode: Measuring rotation acceleration tells you something about your orientation, and it’s a natural complement to measuring acceleration in a straight line.] If you’ve ever held onto the two mounting screws in the of a bicycle tire while a friend spun the wheels, then you’re half-way to […]

[From the last episode: we reviewed and summarized our discussions over the last few months.] OK, so we’re back on track with sensors. And, specifically, we’ve been looking at motion sensors, starting with accelerometers. But we’re done with those (for now); we move next to a necessary companion to the […]

[From the last episode: We can design an accelerometer that measures all three dimensions, or degrees of freedom.] OK, so, so far, we’ve seen that we can use small movements in our accelerometer proof mass to detect acceleration. And we can tell how much acceleration there is by how much […]