Email: Password: Remember Me | Create Account (Free)

Back to Subject List

Old thread has been locked -- no new posts accepted in this thread
???
04/06/09 07:20
Read: times


 		 #164373 - but what is the question?
Responding to: ???'s previous message
You still haven't said what the requirements are for this radio link!

It is impossible to give any meaningful recommendation when the requirements are not known!

You are still talking about this, aren't you:
Bing Logarth said:
I am planning to use it to control led matrix display
A huge one, probably 250x250. And put it along the highway, ads will be entered via rf


Key questions would be:
  • What range do you require?

  • What is your power budget?

  • What is your price budget?

  • What is your space budget?

  • What volume & rate of data do you require?

  • How many signs will there be?

  • What level of RF expertise do you have?

  • Are there any specific requirements or prohibitions for this type of application in your territory


    • For a "huge" roadside display, I would guess that the power, cost, and size of the RF unit would be insignificant relative to the overall project?

    If you are also considering SMS, I would guess that both the rate and volume of data are very low?

    List of 91 messages in thread
    TopicAuthorDate
    Is there an IC for RF tranceiver?            01/01/70 00:00      
       I am sure there is - but            01/01/70 00:00      
          Its no trouble, he can just get one made for him            01/01/70 00:00      
             :)            01/01/70 00:00      
       sample circuits with 8051            01/01/70 00:00      
          Modules are expensive            01/01/70 00:00      
             Some modules are not so expensive            01/01/70 00:00      
       Have a look at these ...            01/01/70 00:00      
          There are available modules here            01/01/70 00:00      
              1/3 of the price of the device , how many you require?            01/01/70 00:00      
             Why being afraid? You have the people...            01/01/70 00:00      
             Economies of scale            01/01/70 00:00      
             The first one will cost about half a million $US            01/01/70 00:00      
                Those Taiwanese 433 MHz modules            01/01/70 00:00      
                   support            01/01/70 00:00      
                      Why?            01/01/70 00:00      
                         How do you test it?            01/01/70 00:00      
          Do they offer sample            01/01/70 00:00      
          There are similar rf modules here            01/01/70 00:00      
             RF is never that simple!            01/01/70 00:00      
             Nordic Transceiver was far better            01/01/70 00:00      
                It's in the eye of the beholder, isn't it?            01/01/70 00:00      
                   I think it actually lies in the holder            01/01/70 00:00      
                      No such thing as "better"            01/01/70 00:00      
                         O really            01/01/70 00:00      
                            Why always pick fights?            01/01/70 00:00      
                               Who piks it            01/01/70 00:00      
                                  Impatient            01/01/70 00:00      
                                     Better is also not a Toy solution            01/01/70 00:00      
                                        You are still focusing on a single track            01/01/70 00:00      
                                           No single track            01/01/70 00:00      
                                              OP's requirements not always identical to yours            01/01/70 00:00      
                                                 No requirements were suggested to him            01/01/70 00:00      
                                                    Richard is correct            01/01/70 00:00      
                                                       I feel your English is direct translation of your            01/01/70 00:00      
                                                          My words are that we do not know            01/01/70 00:00      
                                                             My words ..            01/01/70 00:00      
                                                                Still a bit quick            01/01/70 00:00      
                                                                   Quick ?            01/01/70 00:00      
                                                                      upload and upload            01/01/70 00:00      
                                                                         Ok            01/01/70 00:00      
                                                             Is this the one Per            01/01/70 00:00      
                                                       Richard is correct            01/01/70 00:00      
                                                          how does it feel            01/01/70 00:00      
                                                             how does it feel .... great            01/01/70 00:00      
                                                                in the eye of the beholder            01/01/70 00:00      
                                                                   beholders eye            01/01/70 00:00      
                                                                hi-tech solutions?!            01/01/70 00:00      
                                                                   let me break my fast this time            01/01/70 00:00      
                                                                      Comparative analysis            01/01/70 00:00      
                                                                         Cost            01/01/70 00:00      
                                                                            Straining at gnats            01/01/70 00:00      
                                                                         It looks fiction            01/01/70 00:00      
                                                                            dismissive            01/01/70 00:00      
                                                                               Dont call it dismiss but preference            01/01/70 00:00      
                                                                                  knowing what the OP is trying to do            01/01/70 00:00      
                                                                                     Just give it a look (Modified)            01/01/70 00:00      
                                                                                        No club            01/01/70 00:00      
                                                                                        nRF24L01            01/01/70 00:00      
                                                                                           one point missed            01/01/70 00:00      
                                                                                              That's a different chip?            01/01/70 00:00      
                                                                                                 Some people jump into the middle of threads            01/01/70 00:00      
                                        what does 'big' mean            01/01/70 00:00      
                            let's not waste our time            01/01/70 00:00      
                            We appear to be stuck at that language barrier again            01/01/70 00:00      
                         best ----            01/01/70 00:00      
                            Engineering is always about compromise            01/01/70 00:00      
       nRF24L01 with SPI only            01/01/70 00:00      
          and so are the old ones            01/01/70 00:00      
          what is spi?            01/01/70 00:00      
             Why not ask the vendor?            01/01/70 00:00      
             what is spi? here            01/01/70 00:00      
                futile            01/01/70 00:00      
                   I am planning to use it to control led matrix display            01/01/70 00:00      
                      ... and 100 uA is enough to drive them?            01/01/70 00:00      
                         2kV            01/01/70 00:00      
                      Please be more particular regarding RF link needs            01/01/70 00:00      
                      And you're worrying about a few $ for the RF module?!            01/01/70 00:00      
                         Doesn't this whole tale smell like fiction?            01/01/70 00:00      
                            Library decision: SF or Fantasy?            01/01/70 00:00      
                               Delusion            01/01/70 00:00      
                                  i am starting 0 knowledge again            01/01/70 00:00      
                                     ok            01/01/70 00:00      
                                     Now that is believable!            01/01/70 00:00      
                      a VERY ambitious newbie            01/01/70 00:00      
                         The electricity bills will be cheaper            01/01/70 00:00      
                            :)            01/01/70 00:00      
       TDA5200            01/01/70 00:00      
       Xbee might be the answer            01/01/70 00:00      
          but what is the question?            01/01/70 00:00      
             Cross-references            01/01/70 00:00      

    Back to Subject List