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Video on planned obsolescence.
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Zero999:

--- Quote from: wraper on April 08, 2021, 09:33:21 pm ---
--- Quote from: Zero999 on April 08, 2021, 09:14:13 pm ---I haven't seen any evidence that Apple products don't last as long as their competitors.

--- End quote ---
Their cables last a few months in average and are sold at huge premium. Competitor cables last for years and are much cheaper. Before they removed user ratings:



--- End quote ---
Oh, I'd forgotten about the crappy cables, which I believe were due to Apple going halogen free and nothing to do with planned obsolescence, so it didn't enter my mind. Going by the dates on that screenshot, none of the complaints are recent, so hopefully it's been resolved now. I've had similar problems with halogen free cables, on a project I've worked on.
Bassman59:

--- Quote from: Zero999 on April 09, 2021, 07:40:16 am ---
--- Quote from: wraper on April 08, 2021, 09:33:21 pm ---
--- Quote from: Zero999 on April 08, 2021, 09:14:13 pm ---I haven't seen any evidence that Apple products don't last as long as their competitors.

--- End quote ---
Their cables last a few months in average and are sold at huge premium. Competitor cables last for years and are much cheaper. Before they removed user ratings:



--- End quote ---
Oh, I'd forgotten about the crappy cables, which I believe were due to Apple going halogen free and nothing to do with planned obsolescence, so it didn't enter my mind. Going by the dates on that screenshot, none of the complaints are recent, so hopefully it's been resolved now. I've had similar problems with halogen free cables, on a project I've worked on.

--- End quote ---

One of the reviews mentions the iPhone 4, and yeah, the screen shot date is 2014. The Apple Lightning cables we have that shipped with recent products -- new iPhone SE, iPhone Xs, AirPods, whatever -- have been quite robust, certainly all much better than off-brand cables which last a week.
wraper:

--- Quote from: Bassman59 on April 09, 2021, 04:33:09 pm ---new iPhone SE, iPhone Xs, AirPods, whatever -- have been quite robust, certainly all much better than off-brand cables which last a week.

--- End quote ---
They last a week if you buy cable for $0.5 including delivery from China. Cables which cost $2-3 last for years with no sign of wear. Screenshot is old because since then Apple removed customer ratings, I wonder why...
David Hess:

--- Quote from: james_s on April 09, 2021, 02:24:59 am ---Yeah the shaded pole motors I've had fail were all at least 15 years old. I'm still surprised these are that bad, I'd be curious to look inside one and see what is actually failing, it may be a good opportunity to improve the design. There is no inherent reason a motor like that can't be reliable, I mean the ubiquitous brushless DC muffin fans often last many years and in every one of those I can recall having fail it was bearings.
--- End quote ---

The electronics are potted in epoxy where the coil would be on a shaded pole motor with what I suspect is an exposed 3 wire hall effect sensor to track rotation.  The oldest ones I have seen used shaded pole motor armatures without the shorted turns.

Because the motors still turn, but at low speed, I suspect the rotor may have demagnetized.  Whatever the problem, over a 10 year period they have an appalling reliability and cost effectiveness.
Zero999:

--- Quote from: David Hess on April 10, 2021, 03:45:52 am ---
--- Quote from: james_s on April 09, 2021, 02:24:59 am ---Yeah the shaded pole motors I've had fail were all at least 15 years old. I'm still surprised these are that bad, I'd be curious to look inside one and see what is actually failing, it may be a good opportunity to improve the design. There is no inherent reason a motor like that can't be reliable, I mean the ubiquitous brushless DC muffin fans often last many years and in every one of those I can recall having fail it was bearings.
--- End quote ---

The electronics are potted in epoxy where the coil would be on a shaded pole motor with what I suspect is an exposed 3 wire hall effect sensor to track rotation.  The oldest ones I have seen used shaded pole motor armatures without the shorted turns.

Because the motors still turn, but at low speed, I suspect the rotor may have demagnetized.  Whatever the problem, over a 10 year period they have an appalling reliability and cost effectiveness.


--- End quote ---
The only motor in my refrigerator is inside the compressor. I've not looked at it, but the ones I've seen are normally capacitor start, induction motors. It wouldn't surprise me if inverter driven compressors are used in industrial refrigerators and some top of the range domestic units.

There is no fan in my refrigerator. The evaporator is in the top of the enclosure and cools by convection. It's much more reliable than a fan. I have seen refrigerators with a fan, but I doubt they're more efficient, because the extra energy used to circulate the air, will probably outweigh the tiny saving in improved evaporator efficiency.
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