131–140 of 179 posts
Earlier quoted context omitted.
where can one buy a bag of ferrites?
There are several options from Amazon, try searching for "Clip-on Ferrite Ring".
I'm also just grown weary of amazon.
The "gosh, this is hot" thing when its on charge has been an issue from time to time, as the magsafe ages out, or some component on the mac board. Apparently its caused by HF on top of the desired DC, leaking out the componentry somehow as mechanical vibration.
Apple have form for some very odd stray vibrations around their macbook and being on charge. It's a not-electric-but-you-think-it-is thing around soft-touching their brushed aluminium case, sometimes. The "gosh, this is hot" thing when its on charge has been an issue from time to time, as the magsafe ages out, or some component on the mac board. Apparently its caused by HF on top of the desired DC, leaking out the co…
Apple have form for some very odd stray vibrations around their macbook and being on charge. It's a not-electric-but-you-think-it-is thing around soft-touching their brushed aluminium case, sometimes. The "gosh, this is hot" thing when its on charge has been an issue from time to time, as the magsafe ages out, or some component on the mac board. Apparently its caused by HF on top of the desired DC, leaking out the co…
I think the periodic electric impulses may be interpreted by your brain as a fake stick-slip phenomenon and change how the texture feels.
See: https://superuser.com/questions/462244/electric-shock-mild-v...
Isn’t that just two wraps? Or two and a half at best?
Apple have form for some very odd stray vibrations around their macbook and being on charge. It's a not-electric-but-you-think-it-is thing around soft-touching their brushed aluminium case, sometimes. The "gosh, this is hot" thing when its on charge has been an issue from time to time, as the magsafe ages out, or some component on the mac board. Apparently its caused by HF on top of the desired DC, leaking out the co…
It is electric, and it happens when you're on ungrounded AC.
Apple have form for some very odd stray vibrations around their macbook and being on charge. It's a not-electric-but-you-think-it-is thing around soft-touching their brushed aluminium case, sometimes. The "gosh, this is hot" thing when its on charge has been an issue from time to time, as the magsafe ages out, or some component on the mac board. Apparently its caused by HF on top of the desired DC, leaking out the co…
It is electric, and it happens when you're on ungrounded AC.
Earlier quoted context omitted.
MagSafe® is a registered trademark of Apple Inc., so if they call it a MagSafe® charger, it's a MagSafe® charger. https://en.wikipedia.org/wiki/MagSafe_(wireless_charger)
Gonna hit back with "nope". If Kleenex gets into toilet paper and tell you that toilet paper is now kleenex, the response is "you clearly don't what what the hell you're talking about, get your head out your ass". Magsafe is a magnetic power connector that clicks into a socket, whether Apple sticks their head up their ass or not.
Wikipedia on MagSafe (wireless charger)
> MagSafe is a proprietary, *magnetically attached* wireless power transfer
That probably means I can talk with my phone while wireless charger hangs on to the back of the phone?!
Earlier quoted context omitted.
Honestly, I’d rather my electronics cause some noise on a frequency I never use than have a ferrite bead on every USB cable under the sun. Seems like the author resolved the problem at minimal cost and effort.
The author's minimal effort was facilitated by his access to specialized equipment and time researching the issue. And as others have mentioned, Apple could have placed a small ferrite on the power supply PCB to achieve the same effect.
The minimal effort included hours of studying electrical engineering and radio technology at university including all the math and physics needed. Studying for amateur radio license. And after founding this issue delving deep into radio interference literature and datasheets of various components. Then setting up a test environment to replicate the issue and do tests trying to eliminate the interference. After a success write a blog post describing the solution in short and hopefully interesting way.
> This radio interference was also present on the aviation frequencies (around 124 MHz) How did this thing get FCC approval? What's it's FCC approval number? Who tested this thing? Want to look that up. If RF got outside the charger and into the USB cable, it's very badly designed. The power in the USB cable is DC. There shouldn't be any significant RF component. There should be ferrite beads and capacitors in the po…
Fascinating. No wonders we have so much red tape on stuff that is in the air.