![Screenshot of youtube.com: How gyroscopes got so small [video]](https://hn.urlbox.com/shots/renders/2026/10/16/17655563-d880-4907-8113-2d2abab86bcd.jpg)
How gyroscopes got so small [video](youtube.com)
74 points by surprisetalk | 34 comments
A Primal Space YouTube video explaining the history and engineering of how gyroscopes were miniaturized, starting from a 1914 Paris aviation demonstration.
#sensors on Hacker News
4 stories tagged sensors, newest first.
The MacBook has a sensor that knows the exact angle of the screen hinge(twitter.com)
951 points by leephillips | 455 comments
An X post by Sam Henri Gold showing that MacBooks contain a sensor reporting the exact lid hinge angle, with a GitHub app to read it.
The hidden cost of air quality monitoring(airgradient.com)
539 points by ahaucnx | 258 comments
AirGradient blog post by Achim Haug on the hidden costs of owning air quality monitors, such as manufacturers crippling free data APIs to push paid plans.
Air quality monitors: paying more does not get you more accuracy(airgradient.com)
320 points by ahaucnx | 177 comments
AirGradient blog post by Achim Haug arguing that more expensive air quality monitors are not necessarily more accurate than cheaper ones.