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2016-04-13 00:56 <DocScrutinizer05> hmm, it's mainly a question of presets and people not changing them
2016-04-13 00:58 <DocScrutinizer05> using such style http://wstaw.org/m/2016/04/13/plasma-desktopJV2219.png you never will get decent schematics ;-)
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2016-04-13 04:11 <wpwrak> oh, hadn't even spotted this one. that's hardcore old-style ;-) at least it doesn't also mix connected and unconnected "+" crossings. though it has the connected variant.
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2016-04-13 05:48 <azkay> Say I get one of these: seeedstudio.com/wiki/Grove_-_FM_Receiver seeedstudio.com/wiki/images/7/70/Grove_-_FM_Receiver_v1.0_sch_pdf.pdf
2016-04-13 05:49 <azkay> Apparently, I can run it standalone without getting a Grove board, but it won't remember the frequency I'm on.
2016-04-13 05:49 <azkay> I don't want to use a microcontroller, I just want a (what I thought was simple), analog volume wheel, and to set it to a permanent frequency. Apparently no one sells a module like that
2016-04-13 05:50 <azkay> Any ideas on modifying something like this for that? Or am I going to just have to use a microcontroller?
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2016-04-13 09:07 <DocScrutinizer05> I think that chip is designed to do soft-off and keeps settings as long as you don't cut the power supply
2016-04-13 09:07 <DocScrutinizer05> anything else wouldn't make any sense, chip design wise
2016-04-13 09:08 <DocScrutinizer05> of course it has no persistent storage
2016-04-13 09:09 <eintopf> populate radio transmissions over flying robots -> use case, which you can see in fallout games
2016-04-13 09:09 <DocScrutinizer05> if only because it's a tad more complicated to integrate flash cells and RF structures on same die
2016-04-13 09:21 <DocScrutinizer05> azkay: the chip will remember the settings as long as you don't remove the batteries
2016-04-13 09:23 <azkay> I seeeee. You always come to my rescue :P
2016-04-13 09:23 <DocScrutinizer05> if you'd want to have a hardcoded fixed frequency, you would either need a chip that allows flashing that frequency, then you can't change it without using a flasher. Or the chip would need at least 8 inputs to select the FM channel binary, incl finetuning
2016-04-13 09:24 <DocScrutinizer05> I don't think either exists
2016-04-13 09:24 <azkay> Thanks for the info :), as always
2016-04-13 09:24 <DocScrutinizer05> yw :-) thanks for finding that chip
2016-04-13 09:24 <azkay> Gotta goooo, have a train to catch
2016-04-13 09:24 <azkay> No problem
2016-04-13 09:24 <eintopf> 8 inputs? could you not use some ADC
2016-04-13 09:24 <eintopf> with one input
2016-04-13 09:25 <DocScrutinizer05> well, that would be possible in theory but *highly* unlikely with a PLL tuner
2016-04-13 09:25 <eintopf> ok.
2016-04-13 09:26 <DocScrutinizer05> the smaller and simpler the chip, the more basic the interface and the higher the percentage of digital circuitry inside
2016-04-13 09:28 <eintopf> I thought some potentiometer connected to some pin to setting the freq
2016-04-13 09:28 <eintopf> that's what I think how it's realized when I tune my channel on the radio
2016-04-13 09:28 <DocScrutinizer05> analog tuning the way you suggest is both highly difficult to find the right potentiometer for that actually allows tuning to a station and stay there, and the chip needs pretty high accuracy A/D too
2016-04-13 09:29 <eintopf> ok
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2016-04-13 09:29 <DocScrutinizer05> how many turns has your dial for station setting on your radio? 0.75? for sure not
2016-04-13 09:30 <eintopf> I have some digital radio tuner like the above one inside my mp3 player
2016-04-13 09:31 <DocScrutinizer05> with a normal 270° potetiometer for tuning? That must be real fun to adjust it to a station
2016-04-13 09:31 <eintopf> no
2016-04-13 09:31 <eintopf> I can press buttons and it writes some registers
2016-04-13 09:31 <eintopf> inside the radio chip I suggest
2016-04-13 09:32 <eintopf> 0.1 Mhz
2016-04-13 09:32 <eintopf> is the space
2016-04-13 09:32 <eintopf> accuracy
2016-04-13 09:32 <eintopf> I don't like the transceiver, always makes a noise when switching frequency
2016-04-13 09:32 <DocScrutinizer05> well, I guess it uses an external serial flashrom
2016-04-13 09:32 <eintopf> I think it's software related
2016-04-13 09:33 <eintopf> ok
2016-04-13 09:33 <DocScrutinizer05> it's really difficult to build flash and RF circuits on same die
2016-04-13 09:34 <DocScrutinizer05> most likely even completely different technologies are used for flash and for RF mixing and amplification and filtering etc
2016-04-13 09:34 <eintopf> DocScrutinizer05: http://www.rockbox.org/wiki/SandiskE200HardwareComponents#FM_Chip
2016-04-13 09:34 <eintopf> it's this
2016-04-13 09:36 <eintopf> audio components are always critical... I remember some old mainboard with on-board audio
2016-04-13 09:36 <eintopf> did some noise, when transfer data over ethernet etc
2016-04-13 09:36 <eintopf> I think you can all deal with that
2016-04-13 09:36 <eintopf> but then you need to really know what you doing
2016-04-13 09:45 <DocScrutinizer05> eintopf: http://wstaw.org/m/2016/04/13/plasma-desktopzj2219.png  increment encoder usinf two coils and prolly a turning magnet or the like
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2016-04-13 09:50 <DocScrutinizer05> hmm no, not sure about that
2016-04-13 09:52 <DocScrutinizer05> in fact the whole LV2400x series is with digital interface to a controller MCU only
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2016-04-13 09:57 <DocScrutinizer05> oops 24020 nicht 24002
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2016-04-13 10:04 <DocScrutinizer05> fuer 24020 gibt's wohl kein datasheet
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2016-04-13 10:24 <eintopf> naja, ist ja auch nicht so wichtig
2016-04-13 10:24 <eintopf> radio ist gut wenn der weltuntergang losgeht
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2016-04-13 13:25 <roh> eintopf: sag bescheid, ich hab noch ein studio-mischpult aus den 80ern dazu ;)
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2016-04-13 15:18 <whitequark> DocScrutinizer51: you could make a multi die assembly
2016-04-13 15:18 <whitequark> but I guess that increases cost too muc
2016-04-13 15:19 <DocScrutinizer05> yep, aware of this and the cost it incurs
2016-04-13 15:20 <DocScrutinizer05> not very practicable for those lower-end pricerange chips
2016-04-13 15:20 <whitequark> I wonder why they never do it for large CPUs
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2016-04-13 15:20 <whitequark> for first-level caches
2016-04-13 15:20 <DocScrutinizer05> err they do?
2016-04-13 15:20 <whitequark> well
2016-04-13 15:20 <DocScrutinizer05> hm?
2016-04-13 15:20 <whitequark> I know that SPARCs use eDRAM for L4
2016-04-13 15:20 <whitequark> and I think L3?
2016-04-13 15:20 <DocScrutinizer05> 1st-level cache in flash?
2016-04-13 15:20 <whitequark> nonono
2016-04-13 15:20 <whitequark> SRAM
2016-04-13 15:20 <whitequark> since you have the same problem with logic and SRAM
2016-04-13 15:20 <DocScrutinizer05> aah yep
2016-04-13 15:21 <whitequark> sorry I am being unclear, SRAM is expensive and DRAM is incompatible with logic
2016-04-13 15:21 <whitequark> so you could put logic on one die and eDRAM for L1/L2/L3 on an immediately adjacent one
2016-04-13 15:21 <whitequark> maybe even stack them!
2016-04-13 15:21 <whitequark> add an interposer and some TSVs to connect
2016-04-13 15:21 <DocScrutinizer05> :nod:
2016-04-13 15:21 <DocScrutinizer05> I seem to have seen similar composites
2016-04-13 15:22 <whitequark> I'm sure this raises the cost substantially but with xeons of $1k upwards it can easily be profitable
2016-04-13 15:22 <DocScrutinizer05> well, SRAM is very fast
2016-04-13 15:24 <DocScrutinizer05> easy timing, low energy consumption
2016-04-13 15:24 <DocScrutinizer05> hmm the latter depends
2016-04-13 15:31 <DocScrutinizer05> about time to have some fun with Otto-engine tuning ;-)
2016-04-13 15:36 <whitequark> DocScrutinizer51: https://en.wikipedia.org/wiki/High_Bandwidth_Memory
2016-04-13 15:36 <whitequark> already happens apparently
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