Its also clear that the carrier wasn't ready for it. People with the original iPhone would get entire boxes mailed to them for their Cingular statement, itemizing every data transaction, but then all flat rate charged.
I had an original iPhone and did not get such statements. As I recall while Cingular was indeed not ready to handle unlimited data for customers, it wasn’t really a problem for the first iPhone since it wasn’t 3g. Once the 3g dropped , it was a problem since people were actually able to consume a large amount of data.
Simple: motor inverters are switching power in this frequency range.
It’s already below FCC limits for unintended radiation - it’s not going to block AM activity far from the vehicle, but putting the antenna in the midst of all that radiated noise is challenging.
Lower cost printers are absolutely using LCDs with an LED UV light source. These resin curing printers are pretty darn cheap as well, and have a ton of resolution. They also excel on volume as they do expose the entire plate at once and don’t require scanning a laser around.
The material you get out of such a printer is of course entirely different from an injection molded part.
Yeah, I’m a pretty big 3D printer enthusiast. I’m surprised they shifted from lasers to LCD. I guess the laser and galvo setup was too expensive. Probably also easier and cheaper to ship new “Low Force Display” for people with formcare. End of the day, no matter what these vendors say, the crystals in LCD get damaged by UV light and would need to be replaced eventually.
It also opens up a whole bunch of material options. If you go to resin providers websites they have only a few resins for laser printers and tons and tons for lcd printers.
Usually a combination of calcium carbonate (or bicarbonate for solubility), calcium chloride, magnesium chloride, and or the sulfate versions of the chlorides.
The ability for contract manufacturers to simply source things from neighboring companies is a very real thing - and usually the quality is pretty good. Somehow, working between companies is a quick and fast thing, where here making a new business relationship is seemingly mired in problems.
SolidWorks (and Catia upmarket), Siemens NX are the two most popular in the field that Inventor/Fusion plays in. 2d Autocad is pretty entrenched in some industries with no real competition.
KiCad is getting better and better. At this point Altium is copying features _from_ KiCad, so you know the competition is real :).
Altium is still a Delphi-ish program, though with lots of things now just compiling to .Net. The core layout package has always been solid with a very small core developer group running it which is really more what its known for. The library management parts with collaboration are actually getting a lot better (ECAD<->MCAD, etc).
Altium gained tons of weird stuff with a super weird push to "FPGAs for everything", a giant off-shore (not Australian or Carlsbad) development team, and... all of that crash and burned and no actual customer actually understood what was happening. Much of that legacy is still in parts, but most of the features have been removed by now.
If you need it, the field solver for high-speed diff pairs in Altium is head and shoulders above the approximation techniques in the online tools - which never agree with each other anyway. Kicad is no better than the online ones.
The price of a standalone field solver (which would be more capable than Altium’s, for sure) is more than the price of Altium…
Given that an FPGA can output a lot of diff pairs at pretty high speeds these days, even us hobbyists can have a need for this sort of tech.
99% of the time, I’m routing CMOS logic, i2c, SPI, maybe a CAN network here or there. I have maybe 10 projects where I worked with anything so critical that it required the most precise diff pair length matching. I think SRAM was the only that actually was affected by lackadaisically ran diff pairs.
Even then, KiCAD has successfully guided me to routing a number of signals that are capable of data transmission well into the megahertz range.
Designed gigabit Ethernet board and one with FPGA+DDR3 using KiCad 5 and it was ok. Don’t see benefit in OrCAD or Altium here. Maybe for 60 GHz there might be some benefit. Bet that’s not my working frequency range.
