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JRE
JRE
05:38
@abdullahkahraman I suspect they are talking about a large freezer where you keep large amounts of food for long periods of time. My mother has a freezer in her basement. The freezer is nearly 2 meters long, a meter deep and a meter high. Keeping track of what all is in there, and how long it has been there, would be a good task for a small database. Finding things by opening and digging could take a while if it were full.
abdullah kahraman
abdullah kahraman
05:53
@JRE Oh, we call that "deep freezer" in my country. My mom has one of these, too. She says "Fresh food when nobody has it"
 
2 hours later…
PlasmaHH
PlasmaHH
08:00
@JRE chest freezer in a lot of other areas. I sometimes tried the database thing with a barcode scanner etc but nothing works really well
Asmyldof
Asmyldof
08:13
@PlasmaHH My neighbour has been doing paper admin for 30 years on his stock in fridge and freezer
He'd switch to computers, but his wife can't seem to get past hating computers
And I just used my Dynascope to plant 01005 resistors upright on chip-bond-pads and tie them to ground as test termination
3 hours of my life....
But the people that pay me want it, so...
abdullah kahraman
abdullah kahraman
@Asmyldof Photos or didn't happen
And here I am complaining we cannot manufacture below 0805.. :)
PlasmaHH
PlasmaHH
08:34
@Asmyldof we tried paper too, but nobodoy wants to update the paper when you dump shitload of new stuff into the freezer, or when you just quickly need something while everything is already bubbling on the stove
abdullah kahraman
abdullah kahraman
@PlasmaHH That's very true..
These small ATSAMD microcontrollers are starting to be too shiny I have a hard time trying not to play with them!
 
1 hour later…
Asmyldof
Asmyldof
09:43
@PlasmaHH That's where their system seems to hold up perfectly. I'm not saying I could do it either, but... they can
@abdullahkahraman Will you pay me the € 50000 NDA fine per picture?
abdullah kahraman
abdullah kahraman
@Asmyldof That's a dumb question, of course I will
That's the price of curiosity
Asmyldof
Asmyldof
mmhmmm
 
4 hours later…
PlasmaHH
PlasmaHH
13:16
Why does my phones audio output look similar to this? (ltspcie recreation, actual scope trace at home)
user image
 
1 hour later…
Asmyldof
Asmyldof
14:41
@PlasmaHH Because it is a very badly filtered multi-level D class amplifier? (Is that a class in and of itself? Or BD?)
PlasmaHH
PlasmaHH
15:01
like rail switching G/H? so a DG maybe... ^^
@Asmyldof maybe they assume that whatever gets connected automatically filters anyways, like headphones
but its a bit weird since at certain places it is said that they paid extra attention to provide a good dac, and then they fuck it up that way
the description of the amplifier claims to monitor the impedance and change something according to it...
and the dac is supposed to be a 192khz/24 bit one...
not that the android api would allow for anything like that to be used afaik
also they claim that the built in "loud"speakers are servo controlled...
Marla
Marla
@PlasmaHH. . servo controlled loud speakers?
PlasmaHH
PlasmaHH
@Marla yeah, a technology initially built into subwoofers. The electronic not only provides a drive signal but also checks the membrane position and uses that as a feedback to change the drive signal
hm, there is another feature that is rather intresting though...
they have like all phones today all kinds of equalizer effects, but their setup wizard is intresting.
you are supposed to sit with your headphones on in a quiet room and tell if you can hear all kinds of test tones, and based on that feedback it automatically changes the equalizer curve
Asmyldof
Asmyldof
15:25
@PlasmaHH My first 5.1 amplifier ever already came with a microphone they told you to place in the "centre of experience" and turn on test mode.
My suggestion in that case is to leave the room to get a snack
But it worked great
Didn't matter what speakers you attach, just run test mode again and everything will re-tune.
I feel they could do something similar, since a phone should probably have a built in mic
@PlasmaHH Probably means there's a back-emf measurement to estimate strain
Or they market-appropriated the term for a simple AGC loop
PlasmaHH
PlasmaHH
@Asmyldof yeah, my 7.2 I bought last year did the same (harman kardon). equalizer, delays etc, works fine indeed
but I think for the phone it might be a bit harder, the microphone that came with my amp is actually one with a rather flat response, a bit unusual for a phone I would guess.
its not a high end measurement capsule, but also not your standard electret mic thing
Asmyldof
Asmyldof
@PlasmaHH On the other hand, the microphone that's in your phone is the microphone that's in your phone and no user is going to be replacing that because they lost it.
PlasmaHH
PlasmaHH
so assuming that they don't change manufacturers every day and the quality isn't total crap, its relatively easy to characterize for all existing phones of a series
Asmyldof
Asmyldof
15:44
@PlasmaHH And even integrate a tone-calibration into the production test that lasts for less than 10ms
The reason my amplifiers have a flat response microphone is that they are external and part of an uncontrolled process
"Will the user use his Panasonic Mic with his Panasonic Amp, or will he accidentally use the Yamaha Mic?"
etc etc
If you remove that from the equation, any crap mic that is stable over the expected product use-time can be tone-calibrated in software
And since phones have an expected use time of 2 years, that truly becomes "any crap microphone"
Or, in my case, "a phone has an expected use time of 3 months"
PlasmaHH
PlasmaHH
hm, I use my phones 3-4 years
anyways, why would they do that d style amplifier thing? surely a classical opamp based solution or similar wouldn't be a problem?
or maybe what I am seeing is an artifact of the DAC really... I shall make a proper screenshot of the real trace...
 
2 hours later…
Asmyldof
Asmyldof
17:49
@PlasmaHH 2 very common reasons: 1. Wanky employyes (either in marketing or engineering) who think they're cool for doing that and saving 8mW. 2. They had plans, such as more powerful output options, which are no longer in support in the final design, but proven concept over new engineering, yadda yadda
Tony Stewart
Tony Stewart
18:15
@Asmyldof If you want to do this, you must understand everything about material property changes due to skin effects and choose the correct materials for conductors and dielectric. This is just the beginning.
 
1 hour later…
PlasmaHH
PlasmaHH
19:34
@Asmyldof interestingly, this steps go away when I run it into 50Ohm, but its still very noisy, though I don't know if it is picking up noise too
also the triggering seems to be a mess
 
1 hour later…
Uygar Uçar
Uygar Uçar
20:57
Assume there are two points, we know their unity defines a line. There are infinitely many planes obtaining this line. If i want to have only one plane, i should have at least three points.

I'm trying to tell a smartpen project.
I'm considering of my writings to archive in computer or mobile phone. In order to do that i needed to know my writing plane.
https://postimg.org/image/88ccu5xvh/

I attached two points(two materials like paperclips or like a metal thing) just to define my writing plane. I want to use a third point and obtain my writing plane.
i hope i could tell something

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