4 ms·
A Closer Look at Piezoelectric Crystal
- southwindcg 1y ago*Crystal
- pillars 1y agoThank you! Updated.
- wizardforhire 1y agoObligatory must watch old dod training film on the subject. https://youtube.com/watch?v=ZYyAYIUvI-M&pp=ygUiUXVhcnR6IGNyeXN0YWxzIGFybXkgdHJhaW5pbmcgZmlsbQ%3D%3D https://youtube.com/watch?v=ZYyAYIUvI-M&pp=ygUiUXVhcnR6IGNye...
- thenthenthen 1y agoAs well as Crystals go to war, on the industrial production of crystal oscillators: https://youtu.be/wHenisSTUQY?si=GzjfOFHFOknKRQ9m https://youtu.be/wHenisSTUQY?si=GzjfOFHFOknKRQ9m
- mikkupikku 1y agoI 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 1y agoIt seems to be https://en.wikipedia.org/wiki/Good_American_Speech 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 1y agoWhat is an artificial accent? Isn't every accent just the way people choose to speak?
- FuriouslyAdrift 1y agoIt's a way of speaking taught in broadcasting and acting schools
- kulahan 1y agoI was under the impression that this is effectively teaching people to speak without any accent at all
- mrguyorama 1y ago>effectively teaching people to speak without any accent at all There's no such thing as "no accent"
- ahartmetz 1y agoIn 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.
- NetMageSCW 11mo agoI used to speak with pretty close to no accent as I learned English in Okinawa, then went to 2nd and third grade in Arkansas and then went to school in southern Virginia. The mix resulted in an unaccented speech compared to most localities. Now I have a slight southern accent.
- FuriouslyAdrift 1y agoOh no... it's an "accent". It's just a "desirable" one. Kind of like a posh accent in England.
- FuriouslyAdrift 1y agoThe midwest has the most neutral accent although it is slowly drifting https://www.babbel.com/en/magazine/the-united-states-of-accents-midwestern-american-english https://www.babbel.com/en/magazine/the-united-states-of-acce...
- panki27 1y agoThe link appears to be broken, it redirects me to the main page.
- zenmac 1y agohttps://archive.ph/E4TZ7 https://archive.ph/E4TZ7
- sixothree 1y agoDo we still use piezo to power clock circuits of modern computers?
- nakamoto_damacy 1y agono, 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 1y agoMEMS 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-maybe-other-mems-too/ https://hackaday.com/2018/10/31/helium-can-stop-your-iphone-...
- csours 1y agoSynthetic quartz growing: https://www.youtube.com/watch?v=oFH8_uLzano https://www.youtube.com/watch?v=oFH8_uLzano https://www.youtube.com/watch?v=lzHqhNoyx2o https://www.youtube.com/watch?v=lzHqhNoyx2o
- throwpoaster 1y agoRelated: the triboelectric[0] effect. [0]: https://en.wikipedia.org/wiki/Triboelectric_effect https://en.wikipedia.org/wiki/Triboelectric_effect