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???
03/25/09 08:58
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 		 #163828 - what is spi? here
Responding to: ???'s previous message
Bing Logarth said:
going back to those summitek rf tranceivers, who has tried using them? is it really $6 for a receiver+transmitter module? how much is the shipping cost?


http://focus.ti.com/analog/do...e=swra112b

Yes they are cheap check www.sparkfun.com . Before you get proper advise you still havnt told us plenty of things

1) Your project ?
2) baud rate required ?
3) do you have RF measurement lab/instruments?
4) how secure the communication should be ?
5) OOK , FSK ,GFSK modulation etc.
etc etc etc...
6) When you say "here" where do you mean from Taiwan to------->(US?) ,how can we estimate shipping cost in such an instance?


-Ap

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      

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