How pencil tire pressure gauges work • Hacker News Board

Re: How pencil tire pressure gauges work

#11

Post by rhapsodic » Sat, Dec 10, 2022, 2:55 PM UTC

psychphysic wrote: post #9

nick889996544 wrote: post #8

Earlier quoted context omitted.

It's very very weird. Also seems like they are making it all up based on their assumption of how the internals could fail. Kind of feels like SEO content to me.

Hopefully it's not AI generated

No post body was provided.

Re: How pencil tire pressure gauges work

#12

Post by jrootabega » Sat, Dec 10, 2022, 2:59 PM UTC

ajsnigrutin wrote: post #4

blamazon wrote: post #2

To me, the fact that these things are omnipresent for 99 cents is just as much proof that our species can do pretty much anything, as much as it is that we have levitating trains.

These things are very cheap to produce, don't have a lot of parts, are small and light (cheap to transport). A few days ago I bought a 12V air compressor (for filing car tires) for 6.99€ (it was a reduced price, but at a store where everything is always reduced... the base price was 9.99€) So... 22% VAT removed, then the sellers margin, shipping a not-that-small box from china... then you add the shell packaging, pap…

Having had recent, in-depth personal experience with these things, PART of the answer is that they're crap. They almost don't exist, in that a working one is rare. Each one is really just a probability of functionality; a non-functional replica of some ideal product. They will almost certainly break with relatively low amount of standard usage (or the usage they support is ridiculously unrealistic, like not using them in temperatures over 86 F). And this is because their pipelines are optimized to produce the parts as cheaply as possible; just enough to physically exist and work, perhaps, a few times. They will be sold under different names over time so people won't be able to share their experiences. And of course, they are made in places where human suffering and pollution are not penalized.

Re: How pencil tire pressure gauges work

#13

Post by somat » Sat, Dec 10, 2022, 4:26 PM UTC

dvh wrote: post #5

lukev wrote: post #3

This is interesting. I read this link because I've been curious about exactly how these work, and I like knowing that sort of thing. Turns out, it works precisely how I would have expected it would work, and indeed, probably using the first approach I would have used for designing such a thing (granted, I'm not a mechanical engineer.) Most things I learn about do NOT fit expectations that well. Truly a simple, practi…

I had "Unusual sources of energy" class at University. One day we were sitting in the classroom, the teacher was there but the class didn't started yet. I was eating one of those extruded styrofoam cracker and I noticed on the packaging there was a nutrient information, I converted it 1:1 to electric energy and calculated that one cracker could power single LED diode for 6 months. It seemed wrong so I told it to the…

A good youtube video on the subject of the energy content of food and how efficient the body is at using it.

https://www.youtube.com/watch?v=9wZ0wTqJIxY

Re: How pencil tire pressure gauges work

#14

Post by oppedahl » Thu, Dec 15, 2022, 1:44 PM UTC

Hello folks. I am the person who wrote that blog article. I will be delighted if people might actually post their comments on the article itself! I am fascinated that someone thought I was writing like "a children's book". I am also fascinated that someone said "It's very very weird. Also seems like they are making it all up based on their assumption of how the internals could fail. Kind of feels like SEO content to me." I can promise you that when I write this blog, I never give even a moment's thought to SEO things. My guess is that most readers of this "Hacker News" site would find other articles of mine to be interesting: https://blog.oppedahl.com/?cat=13 .