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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