Many companies, especially small businesses, struggle with Mac-Windows coexistence. However, coexisting in a Mac-Windows divided business world may be easier than you think, thanks to Apps4Rent's Exchange hosting services. Over the past several years, the two have taken their main platforms and built something akin to a Mac Windows computer conglomerate.
For individuals who use both technologies, these converging platforms are a huge boon, especially for business purposes. Exchange with ActiveSync has been around for quite awhile as a Microsoft Exchange server application. However, now the Mac-Exchange server integration has improved. How often have you had to send a file to a friend or associate to open because your iMac computer doesn't support Windows, or your Windows computer won't open iMac files,
For that matter, how often have you come across a program you could really use that wasn't created for your computer system, Introducing Boot Camp, a built-in utility that allows you to install Windows XP and Vista on an Apple Mac computer system. Even if your Mac isn't a new version, you can still run Windows applications on your Apple Mac computer with third-party programs such as Parralels and VMware Fusion. Both programs work much the same as Boot Camp on Intel-based Macs, allowing you to run Windows applications on an iMac computer at the same time.
You say that the 30 bucks Apple charges for these chargers will be profit, mainly. Perhaps that is the case. Seeing how much thought went into these things, knowing a recall and a redesign happened, reading how the design goes above and beyond safety regulations, I dare assume Apple spent a lot of time on research, prototyping, and testing.
That time is an expensive investment and I'd say a large part of the margin goes into returning that investment. I've been wondering why the presumably high-quality samsung charger that came with my Galaxy Nexus emits an ultra high pitched squeal (which wavers a bit) when plugged in, but that goes away when the phone's plugged in.
70kHz but varies depending on load, so maybe it dips into the top of the audible range when there's nothing plugged in, I believe the model on the charger is ETA0U80JBEBSTD. Have you done a disassembly of the Kindle usb charger, It also has some Flextronics work. Would like to see the contrast with Apple’s specs. While Amazon has a smaller charger that can fit even more easily in a pocket, they were kind of notorious for having usb cables that disintegrated in under a year.
The physical vibrations come from the wiring of the inductor or transformer. Current moving through a wire creates a coupling force on the nearby wires pulling them closer and then pushing them away, when the current stops flowing at the end of the cycle. The wires displace a tiny amount on each oscillation of the drive waveform.
Given that the coil has many hundred turns of wire, each of which, is displacing, the sound pressure generated by the movement can amount to something noticeable if it is in the audio band. This problem usually gets more noticeable as the power supply ages. Manufacturers coat the coil with glue to reduce the movement of the wires.
As the component ages, the glue becomes more brittle and may crack or otherwise yield allowing the wires to displace more freely. Great article. I am a super tough sell on that account, too. Extremely well done and technically accurate; a pleasure to read. I appreciate this level of engineering too, but seldom see anyone doing such a thorough job of exploring the details of it online. Thank you so much for this great article!
0 Comments