Quick jump back to the T12 portion of the thread. I didn't hit "buy" the other day when I was doing the checkout as I got distracted by the looks. This went very much in my favor as I got a $4 discount voucher this morning.
Ergo T12 DC version for £16.20
which is even more ridiculously good value for money! Hopefully I will not get a buggering from customs.
Plus I also bought 200 UV LEDs because I need to make some prototype PCBs with faster turnaround and lower cost on larger boards than OSHpark. UV box here I come. No more 30 day turnaround. Got some photo etch resist board, developer and transparencies on the way too. Total expenditure of this project <£20 hopefully.
Just found another suitable metal case for the mains driven version that uses the same extrusions as the supplied assembled version but has an extra 20mm in length which would enable the IEC socket to be linked to the circuit board via some flexible cable, thus removing the mechanical stress from being transferred to the solder joint and also has sufficient room to all effectively bond all the case back the incoming earth terminal thus removing all matters of concern with the Quicko T12-952 assembled unit.
The existing front and back plates can be retained (ideal as the cutouts are different and the power socket is different) so it would be a quick and cheap solution to all the problems, if only the shipping was quicker. ![Face Palm :palm:](https://www.eevblog.com/forum/Smileys/default/facepalm.gif)
Sounds like you're losing out on the "cheap" part of the OLED T12 Controller ecology.
Is there any reason in the world you can't just rotate the back cover plate so the IEC socket clears the PCB instead of resting on it? Then all you have to do is fab up your GND screws and you're done.
The main realization I made a few days ago is that the main reason I buy this equipment is to repair and verify the other equipment I buy... which I then use to repair and veryfiy the other equipment I buy... which I then use to repair and veryfiy the other equipment I buy... which I then use to repair and veryfiy the other equipment I buy... which I then use to repair and veryfiy the other equipment I buy...
I've expanded my collection based on this 'logic' more than a few times. For instance, get a piece of HP gear. Obtain a copy of the POH (Pilot's Operating Handbook, AKA the operating and service manual). Look at the "Recommended Test Equipment" table in the "Maintenance" section. Go to evilBay and add new searches. Buy more stuff. Return to beginning and repeat, adding new items with each iteration of the loop.
-Pat
This is how I wound up with 3 2465s on/under my bench... for several of the critical service/calibration procedures, the service manual calls for a calibrated 2465.
![Laughing :-DD](https://www.eevblog.com/forum/Smileys/default/smiley_laughing.gif)
Back to IOS v Android earlier posting. Apple has admitted that it has deliberately slowed down older products when IOS 11 was released because it was thought that older devices with ageing batteries couldn't cope with it. They say it was "Our goal is to deliver the best experience for customers, which includes overall performance and prolonging the life of their devices," it said.
This has a huge smell of Bullshit about it, people could if after upgrading to IOS 11, problems arose due to poor battery performance, have a new battery fitted but that would not have increased sales of their new phone, I suspect it has much more to do with their sales war with Samsung then anything else.
http://money.cnn.com/2017/12/21/technology/apple-slows-down-old-iphones/index.html?sr=fbCNN122117apple-slows-down-old-iphones0728AMStory
It’s really not bullshit. It’s just not the trade off you’re used to hearing about. Someone’s cheese got moved. The battery performance trifecta. Choose your compromise: lifetime (t), capacity (Q), performance (I) Everyone bitching because Apple chose performance and everyone else chose lifetime. Q is constrained by size and technology. And incidentally you can get it fixed for free, unlike everyone else’s t limitation.
t is the thing that ruins user experiences. operational t is bad if it’s low. Latency t is bad if it’s high. Q no one gives a crap about or even understands (who knows what Watt/hours are bar us technical folk). A 50% drop in performance as a trade off is good if you start from a point of efficiency (xnu+cocoa+llvm) as this may only result in a perceptive latency increase of a few ms.
Your Tesla Model S now drives like a high end Merc C class rather than you having to call the AA out every time your Ford Focus tank gets to 25%
Case in point: Casio FX991ES PLUS calculator. Optimised for t. Battery life - fuck knows as I’ve been using it for about 2 years non stop. TI nSpire CAS. Recharge daily. Dies in the middle of something important. Useless. Casio much slower solver. Meh fine.
Case in point: Agilent OLED DMMs. Battery measured in hours/days. Keysight LCD DMMs. Battery measured in hundreds of hours of constant use, display slower. Meh fine. Lame attempt to keep it TEA related.
I charge for consultancy usually on such matters ![Wink ;)](https://www.eevblog.com/forum/Smileys/default/wink.gif)
![Confused :-//](https://www.eevblog.com/forum/Smileys/default/confused0024.gif)
Then TELL ME there's a trade off. "This new software update is configured to slow your hardware down if the battery is worn down too much. It does this to prevent random crashes caused by voltage sags. Performance may be restored by the installation of a new battery." I can then make a decision as to whether I want to install the update and take my chances with the existing battery, plan to get a new battery along with the update to extend the useful life of the device, stick with the existing software that's presumably working satisfactorily for me now, or upgrade to the latest and greatest hardware.
Bullshit is pushing out an update with an unannounced new 'feature' that, without explanation, slows my phone to a slog. The fact that they're now 'admitting' that this 'feature' exists going on a year after it came out tells me that they weren't entirely on the up and up, and while they might not have intended it to cause people to upgrade their phones because of it, they were probably not entirely displeased when that was the result.
You buy your Casio or TI calculator (I assume) knowing going in that it's optimized for one thing or the other. If you made your purchase based on this, I doubt you'd be pleased if you had an update pushed out to it that, without any warning, changed the optimization to something else and hindered performance. Performance that had been entirely satisfactory to you before the update.
-Pat
They DO tell you. Every upgrade of iOS I've ever seen has the same "This upgrade may make older devices run slower." disclaimer. And it's really NOT rocket surgery; EVERY OS released since the dawn of bits needs newer, more powerful hardware to run on. The difference is Apple took a proactive approach to keep from having another "exploding iPwn battery debacle".
Smeesh. I sure wouldn't want to be in their shoes... fix a problem or not, everybody is going to be up their butts screaming about imagined evil intent. "Sufficient unto the day is the evil thereof." applies here; there's enough horror out there without freaking MAKING IT UP.
Here's something you need to understand about LiPo batteries: they are LIVESTOCK, just like bread and vegetables.
From the day they are manufactured, their chemical makeup starts to deteriorate and the IR of the cell begins to increase, even when being used with optimal charging/battery maintenance processes (which Apple has been on the cutting edge of since the first flaming battery debacle) it is pretty much a statistical certainty that the battery in a 2-year-old iPwn is going to be operating at a given percent LESS maximum current draw AND total mAH capacity than a new one, OR WORSE. If a user keeps a phone on a charger or runs it dead and leaves it in a drawer for months, either way that battery will SUFFER even more than one that is used normally.
Add to that the fact that due to hardware technology and the inexorable march of software development, the real usable life of ANY smartphone is about 2 years; the buttons and ports get worn and full of human "bathtub ring" type muck and pocket crud, and the ever-increasing processor demand of applets running EVERYWHERE on the internet means you need more processor, RAM and storage for a phone to work acceptably.
Really, for a smartphone, a design life of 2 years is pushing it; I just replaced an android phone with quad-core processor and 1.5 GB RAM with another that has a 2x as fast quad-core 64-bit processor and 3GB of RAM. Using it, it feels just like every other phone I've owned when it was new, while my old phone felt slow and cramped even after a complete wipe/reinstall. It was an 11 months old Samsung.
There's a good argument for non-user-replaceable batteries. The battery in my new phone (a semi-permanent bare lipo) is a 4.4V/3.85V Nominal HV cell approx 120% as large as the one in my previous phone, yet has 150% as much capacity. There is a HUGE variation in the quality of LiPo batteries available to the public right now; the cheap batteries on fleaBay are just that: CHEAP BATTERIES. A manufacturer has no QC over those aftermarket batteries, whether they have proper protection or BMS PCBs installed, or even if they are anywhere near advertised dimensions or capacity or even nominal voltage.
Making the battery "non-replaceable" means the manufacturer doesn't have to pay oodles of support agents to listen to every ignorant dumbass whining about poor performance in their year-old phone which was actually caused by the cheap-ass battery they bought off fleaBay that voltage-sags every time the processor hits more than 70% load. And they don't have to worry about arguing with said dumbass and paying to ship the phone back unfixed because of said POS battery.
It's the same argument they have against making their portables so the USB connection supports "Host" mode; as soon as you do that, you have every idiot and his brother whining about poor performance/short battery life from their iPud that is actually caused by the USB back massager and/or coffee-cup-warmer they plug into it every day.
IMO, particularly for a brand selling an "upscale" product experience, these are valid and important arguments.
Merry Christmas!
mnem
*Waiting by the chimney with
a shotgun across my knees glee*