kyak changed the topic of #qi-hardware to: Copyleft hardware - http://qi-hardware.com | hardware hackers join here to discuss Ben NanoNote, atben/atusb 802.15.4 wireless, anelok and other community driven hw projects | public logging at http://en.qi-hardware.com/irclogs and http://irclog.whitequark.org/qi-hardware
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<DocScrutinizer05> hmm, it's mainly a question of presets and people not changing them
<DocScrutinizer05> using such style http://wstaw.org/m/2016/04/13/plasma-desktopJV2219.png you never will get decent schematics ;-)
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<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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<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
<azkay> Apparently, I can run it standalone without getting a Grove board, but it won't remember the frequency I'm on.
<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
<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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<DocScrutinizer05> I think that chip is designed to do soft-off and keeps settings as long as you don't cut the power supply
<DocScrutinizer05> anything else wouldn't make any sense, chip design wise
<DocScrutinizer05> of course it has no persistent storage
<eintopf> populate radio transmissions over flying robots -> use case, which you can see in fallout games
<DocScrutinizer05> if only because it's a tad more complicated to integrate flash cells and RF structures on same die
<DocScrutinizer05> azkay: the chip will remember the settings as long as you don't remove the batteries
<azkay> I seeeee. You always come to my rescue :P
<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
<DocScrutinizer05> I don't think either exists
<azkay> Thanks for the info :), as always
<DocScrutinizer05> yw :-) thanks for finding that chip
<azkay> Gotta goooo, have a train to catch
<azkay> No problem
<eintopf> 8 inputs? could you not use some ADC
<eintopf> with one input
<DocScrutinizer05> well, that would be possible in theory but *highly* unlikely with a PLL tuner
<eintopf> ok.
<DocScrutinizer05> the smaller and simpler the chip, the more basic the interface and the higher the percentage of digital circuitry inside
<eintopf> I thought some potentiometer connected to some pin to setting the freq
<eintopf> that's what I think how it's realized when I tune my channel on the radio
<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
<eintopf> ok
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<DocScrutinizer05> how many turns has your dial for station setting on your radio? 0.75? for sure not
<eintopf> I have some digital radio tuner like the above one inside my mp3 player
<DocScrutinizer05> with a normal 270° potetiometer for tuning? That must be real fun to adjust it to a station
<eintopf> no
<eintopf> I can press buttons and it writes some registers
<eintopf> inside the radio chip I suggest
<eintopf> 0.1 Mhz
<eintopf> is the space
<eintopf> accuracy
<eintopf> I don't like the transceiver, always makes a noise when switching frequency
<DocScrutinizer05> well, I guess it uses an external serial flashrom
<eintopf> I think it's software related
<eintopf> ok
<DocScrutinizer05> it's really difficult to build flash and RF circuits on same die
<DocScrutinizer05> most likely even completely different technologies are used for flash and for RF mixing and amplification and filtering etc
<eintopf> it's this
<eintopf> audio components are always critical... I remember some old mainboard with on-board audio
<eintopf> did some noise, when transfer data over ethernet etc
<eintopf> I think you can all deal with that
<eintopf> but then you need to really know what you doing
<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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<DocScrutinizer05> hmm no, not sure about that
<DocScrutinizer05> in fact the whole LV2400x series is with digital interface to a controller MCU only
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<DocScrutinizer05> oops 24020 nicht 24002
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<DocScrutinizer05> fuer 24020 gibt's wohl kein datasheet
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<eintopf> naja, ist ja auch nicht so wichtig
<eintopf> radio ist gut wenn der weltuntergang losgeht
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<roh> eintopf: sag bescheid, ich hab noch ein studio-mischpult aus den 80ern dazu ;)
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<whitequark> DocScrutinizer51: you could make a multi die assembly
<whitequark> but I guess that increases cost too muc
<DocScrutinizer05> yep, aware of this and the cost it incurs
<DocScrutinizer05> not very practicable for those lower-end pricerange chips
<whitequark> I wonder why they never do it for large CPUs
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<whitequark> for first-level caches
<DocScrutinizer05> err they do?
<whitequark> well
<DocScrutinizer05> hm?
<whitequark> I know that SPARCs use eDRAM for L4
<whitequark> and I think L3?
<DocScrutinizer05> 1st-level cache in flash?
<whitequark> nonono
<whitequark> SRAM
<whitequark> since you have the same problem with logic and SRAM
<DocScrutinizer05> aah yep
<whitequark> sorry I am being unclear, SRAM is expensive and DRAM is incompatible with logic
<whitequark> so you could put logic on one die and eDRAM for L1/L2/L3 on an immediately adjacent one
<whitequark> maybe even stack them!
<whitequark> add an interposer and some TSVs to connect
<DocScrutinizer05> :nod:
<DocScrutinizer05> I seem to have seen similar composites
<whitequark> I'm sure this raises the cost substantially but with xeons of $1k upwards it can easily be profitable
<DocScrutinizer05> well, SRAM is very fast
<DocScrutinizer05> easy timing, low energy consumption
<DocScrutinizer05> hmm the latter depends
<DocScrutinizer05> about time to have some fun with Otto-engine tuning ;-)
<whitequark> already happens apparently
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