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433MHz remotes with >500ft range

Discussion in 'Electronic Design' started by Joerg, Oct 29, 2010.

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  1. Joerg

    Joerg Guest

    Out here in the Wild West _this_ is a range:

    http://www.eldoradorodandgun.com/images/sat-map-range-ask2.jpg
     
  2. Joerg

    Joerg Guest

    Paul is in Finland. The place where they hack a hole in the ice and dive
    right from the sauna into freezing water :)

    For range. 2.45GHz doesn't give you 500ft sustained unless you really
    hammer the power into the air. Which is a problem when there's only a
    coin cell to feed things.

    Yes, as I mentioned it's more like half a cell phone, with belt clip and
    a hard stub antenna sticking out.

    There are, but those are all different between countries. Makes for a
    logistics nightmare.
     

  3. Shame, it should be the place where we put the huge number of criminals
    which we currently allow to walk the streets.

    Mansfield (Shawshank) was 7 X 52 cell tiers. The largest in the
    country during the years the prison was in use.

    We need more prisons. We need better border incursion protection
    systems, and snipers for those that make their incursion for criminal
    purpose.
     
  4. Oh yeah... Surround the new prisons with powerful electric fences.
    Hell, do the border that way too... the second, inner fence... the one
    with the "Deadly Force Authorized" signs.

    A L T O V O L T A J E !
     

  5. And you're a goddamned retard. So what is new?
     
  6. TTman

    TTman Guest

    I think it's doable at 10bps @433
    I had a friend years ago that did an RF domestic oil tank level meter
    (UK)and achieved huge range at very low bps.
     
  7. The top of your desk or your room are quite natural entities to form a
    cell. However trying to communicate with other devices in a nearby
    room would certainly be possible using "sufficient" transmitter power
    levels, which would ruin the frequency reuse in nearby rooms.

    For that reason, it makes sense to use low power base stations in each
    room and connect the base stations together with some wired network.
    In this way, frequencies can be reused much more effectively. Thus
    allowing much more devices to coexist in a given space and frequency
    band, including your next superduper wireless gadget :).

    Many modern devices for unlicensed bands are quite good in handling
    the congestion. For instance, when new DSSS transmitters are added to
    an area, each receiver will suffer a small degradation of the
    signal/noise ratio of the wanted signal. With a large number of new
    transmitters added, the received (despread) SNR is so low that
    communication is impossible.

    Assuming that you are the first user of band in your area and you
    succeed in setting up links as long as the (often hilarious)
    manufacturer claims. Some time later (perhaps next week), when others
    have installed their systems in your area and frequency band, the SNR
    gets degraded, your weakest links will drop out now and then and
    finally the strongest short links work reliably. Thus, you either have
    to design your network with sufficient SNR margins at the beginning or
    be prepared to split your network later, when there are other signal
    sources installed that are reducing the SNR.
     

  8. You're a goddamned idiot. Every land in every nation was a conquered
    land at some point by some group, including yours, you pathetic piece of
    shit.

    You are a fucking loon if you think a few scattered tribes across this
    vast nation had any claim to the entire nation. They were not even
    trying to make such a claim.

    And no, the Mexicans have no fucking claim either, and the way they are
    acting we should annex the entire country there as well.

    "Americanions" is not a word, so retarded twits like you with your
    retarded mentality should end up in a prison as well. You are as bad as
    an Al Qeda terrorist.

    Hey, you retarded ****, at least you can rest in the knowledge that
    your stupidity is not as bad as that of the donkey.
     
  9. Jan Panteltje:
    But I don't think that they will be chased from there, as the Dutch were
    chased from Africa, Asia & America.
     
  10. Joerg

    Joerg Guest

    I'll have to dig up some documents about that. I have read about a guy
    who did massive autocorrelation and achieved a stunning (and sustained)
    range. Problem is, we'd need remotes ready-to-go, off theshelf stuff.
    Nicely packaged and ideally with the batteries already in there :)
     
  11. Joerg

    Joerg Guest

    Huh? What are they doing there? All the Alaskans I know are pretty
    level-headed and smart folks.
     
  12. Jan Panteltje:
    Well, also maladies and alcohol played their part.
    Tell us about your new Government. Are you happy with it?
    Holland, contry of free pot.
     
  13. Michael A. Terrell:
    That was because your problem was so bad that it tilted the statistics or
    because, in order to bear you, they all had to drink?
     

  14. YOU're a goddamned idiot.
     

  15. Your a scwewy wabbit aren't you?
     
  16. Errr You're

    Wait an minute! If he can't say the R in Screw, how could he say the R
    in You're?! (attempt to divert attention from the your/you're thing. :)
     
  17. Guest

    One theory is that the lack of sunlight causes depression. Many Northern
    countries (and US states) have the similar problems.
     
  18. Jan Panteltje:
    Apart from Muhammad, Confucius, Claude Vorilhon and Ron Hubbard, I'm not
    sure of the existence of any other religion founder.
    Peple get heart attacks all of the time.
    Which show are you referring to?
    Creating an understanding? How? By washing their brains, so they behave as
    sheep?
    Iosif Vissarionoviè D¾uga¹vi was very good at it.
    You'd prefer religious interest groups? C'mon, move to Iran. It's a
    theocracy, what better place in the world?
    The Church cannot be not leftist. It's about religion, about how to control
    peple by preaching bullshit.
    I understand your position. That's what happen when educated people does
    not have enough work to do. They beacame communist, find an audience with
    the illiterate, start making noise and disorders, then the "silent
    majority" gets tired of it and elects a dictator. It has happende and will
    happen again.
    Again religion, again looking for a purpose in life outside yourself.
    Exactly. And, if possible, help others do the same.
    Do you say it by experience?
     
  19. Michael A. Terrell:
    I'm sorry. I hoped you were drunk.
     
  20. Guest

    DimBulb thinks it is. Perhaps the two of them can get a room.
     
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