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universal Radio receiver

Discussion in 'General Electronics Discussion' started by roltex_rohit123, Jun 17, 2010.

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  1. roltex_rohit123

    roltex_rohit123

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    Oct 12, 2009
  2. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

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    Jan 21, 2010
    Construct it as per the instructions first. Then see if you can be bothered changing the design.

    It will also give you a baseline to see if you've made things better or worse.
     
  3. NickS

    NickS

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    Apr 6, 2010
    I took this little excerpt from the linked page and had a good laugh. Just think if we could somehow figure out how to decode FM signals there could be a whole new world of interesting things to listen for.
     
  4. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

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    It is funny, but I suspect he's wondering how the signal *are* decoded rather than how they *could* be.

    There's a possible explanation near the end of the page.
     
  5. davenn

    davenn Moderator

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    Sep 5, 2009
    my crystal set (45 years ago) received all stations all at once :rolleyes:
    thank heavens I discovered selectivity hahaha

    one has to wonder why anyone would still wanna hear everything all at once in this day and age of excellent radio receivers ;) !!

    Dave
     
  6. roltex_rohit123

    roltex_rohit123

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    Oct 12, 2009
    can there be a selectivity added to this circuit?
     
  7. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

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    No. The whole point of the circuit is that it has absolutely no selectivity.

    (Well, technically the answer is yes. But it's a bit like saying you want a forklift instead of a car, and then asking "but how do I make it into a car". You're better off starting with a car. In this case you'd be better of starting with a conventional receiver -- one with a tuned front end.)
     
  8. roltex_rohit123

    roltex_rohit123

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    Oct 12, 2009
    can FM and Shortwave and all bands be demodulated by a single circuit? like aerospace radios and cellphone signals...
     
  9. (*steve*)

    (*steve*) ¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd Moderator

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    Jan 21, 2010
    No, not unless you're talking about software defined radio. (And then the problem is simply shifted to different software modules rather than different circuits)

    There's probably some ICs that will do what you want -- essentially they will have all the smarts to do multiple decodings, but still there are multiple modules in the IC, not just one.
     
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