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A Closer Look at Piezoelectric Crystal (samaterials.com)
panki27 1 days ago [-]
The link appears to be broken, it redirects me to the main page.
zenmac 1 days ago [-]
throwpoaster 17 hours ago [-]
Related: the triboelectric[0] effect.

[0]: https://en.wikipedia.org/wiki/Triboelectric_effect

wizardforhire 1 days ago [-]
Obligatory must watch old dod training film on the subject.

https://youtube.com/watch?v=ZYyAYIUvI-M&pp=ygUiUXVhcnR6IGNye...

thenthenthen 1 days ago [-]
As well as Crystals go to war, on the industrial production of crystal oscillators: https://youtu.be/wHenisSTUQY?si=GzjfOFHFOknKRQ9m
mikkupikku 1 days ago [-]
I wish people still talked with the accent/style used in these old videos. It's so easy to understand and listen to, compared to the typical modern American accent.
ahartmetz 22 hours ago [-]
It seems to be https://en.wikipedia.org/wiki/Good_American_Speech aka Mid-Atlantic Accent - an artificial accent - with a fairly strong natural accent of the speaker coming through.
kulahan 18 hours ago [-]
What is an artificial accent? Isn't every accent just the way people choose to speak?
FuriouslyAdrift 17 hours ago [-]
It's a way of speaking taught in broadcasting and acting schools
kulahan 17 hours ago [-]
I was under the impression that this is effectively teaching people to speak without any accent at all
FuriouslyAdrift 16 hours ago [-]
Oh no... it's an "accent". It's just a "desirable" one. Kind of like a posh accent in England.
kulahan 16 hours ago [-]
Well no, definitely not - it’s just meant to be as clear as possible. The point is to make sure as many people as possible can understand you, which is very important in informational and entertaining broadcasts.
mrguyorama 14 hours ago [-]
>effectively teaching people to speak without any accent at all

There's no such thing as "no accent"

ahartmetz 9 hours ago [-]
In English at least. Some (maybe most? - no idea honestly) languages do have more or less official standard accents. For German, that standard accent is very close to how people speak in Hannover.
mitthrowaway2 16 hours ago [-]
An artificial accent is one where there are no native speakers raised with it, but rather people are professionally trained to speak with it.
FuriouslyAdrift 17 hours ago [-]
The midwest has the most neutral accent although it is slowly drifting

https://www.babbel.com/en/magazine/the-united-states-of-acce...

sixothree 21 hours ago [-]
Do we still use piezo to power clock circuits of modern computers?
nakamoto_damacy 21 hours ago [-]
no, we use atomic clocks now... j/k

piezoelectric refers to generation of electricity from pressure applied to the material... the inverse of that effect is what generates oscillation.. quartz has a natural resonant frequency determined by its shape, size, and the way it’s cut, and when you apply AC it oscillates at a specific frequency.. the applied electricity causes is the material to deform.. that is the basic physical effect used in oscillators

MEMS oscillators are increasingly replacing quartz in compact, rugged, or integrated designs.

PLL-based frequency synthesis is used to scale a low-frequency reference (e.g., 25 MHz crystal) up to CPU/GPU GHz speeds.

willis936 20 hours ago [-]
MEMS are made on a different process than other silicon devices, which slightly increases their cost. They also need to have hermetically sealed packaging, same as quartz. Together there is little fundamental savings to be had with MEMS, but they do offer a higher ceiling on performance. I don't see crystals going away anytime soon.

Also, if you get a MEMS in a small epoxy / CSP package be weary of gases that permeate the packaging material, such as helium.

https://hackaday.com/2018/10/31/helium-can-stop-your-iphone-...

southwindcg 10 days ago [-]
*Crystal
pillars 10 days ago [-]
Thank you! Updated.
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