How gyroscopes got so small [video]

This is not wrong at the pop sci level of the video.

Your phone undoubtedly has a gyroscope, accelerometer, and magnetometer all in a single IMU IC. Data from this IMU can be used to create a position cloud.

Add in some other sensor data to help collapse the position cloud, and your phone absolutely knows its position in space. Incidentally part of why IMU have magnetometers is that it’s basically one more sensor data to help collapse position clouds from just the orientation and acceleration data.

I think the only leap is how precise your phone would be with only gyroscopes generating orientation and acceleration data. But the video sort of hints at this when talking about the first rocket design using this data.

The video talks about accels in a few places, and how they are required for pose estimates.

It's basically what VR headsets and controllers do, sans their periodic error correction from cameras or lighthouses.

On this note, thank you for pointing it out.

2. The opposing springs are normally in equilibrium, so in the absence of forces the center mass moves back to position zero.

3. Think of it like a bridge. The points of contact and support are to the sides and stationary, while the spring mass system is suspended in air or in a vacuum.

4. Is simple enough if you start with two disconnected layers of materials, and then etch the top layer. You could also start with a layer of something like photoresist spincoated on the bottom layer, except for the adhesion points...

An interesting real-life scenario was the possibility of helium atoms being able to get inside the MEMS clock of some smartphones and cause the phone to stop working until enough helium can escape.

If you wanted to use such a device as a simple oscillator, you just set it vibrating and measure the oscillation frequency. Since the material isn't perfectly elastic, the vibrations will eventually be damped and die out (I guess this is what you mean by "friction"), so you use a feedback mechanism to keep the oscillation going.

A gyroscope works the same way, except that you use feedback to maintain an oscillation in one axis, and measure how much of that oscillation couples to a different axis. Whatever effect the damping has on the final measurement, I would assume it can be easily calibrated out.

I don't really know how they physically manufacture these devices without damaging the tiny, delicate structures. It's kind of mindblowing that they're so incredibly cheap.

For instance, decreasing distance increases capacitance (thankfully, imagine the capacitive parasitics Voyager 2 would induce into all of our electronics otherwise... I'm taking a ridiculous example, but the claim is ridiculous too). On the very same diagram, it shows two capacitor values changing, but those would be connected in parallel, so you would get a constant value at the end: the structure as presented is wrong, though it has the correct idea: inertia in a mass-spring system, readout (usually) via capacitance change.

So yeah it works, but if you don't know these devices already, you can't really tell what is accurate. The Wikipedia article is more accurate.

https://www.ifixit.com/News/11986/iphones-are-allergic-to-he...

Maybe YouTube will cater to those who don't know/care about AI generated content. Given that they make money on the spread between showing ads and views that are not monetized (I assume there is some lower threshold such that yt doesn't have to pay anything?). Those viewers might be a higher tier of ad consumer; one that is easier fooled and manipulated.

It's only going to get harder to detect AI voice. Sometimes they can talk for 15m before one syllable is mispronounced. I'm sure they are working on adding breath sounds and inflection.

Or if it gets bad enough, they will charge for a tier that requires human verification from the creators, perhaps.

If I'm doing research, I don't mind if it's AI but it should be clearly labelled and de-selectable.

What is it even supposed to do?