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01/23/06 05:52
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#108060 - Relay board diagram
hello i want to connect 8 12v relays with atmel 89c51 port p0 can you help about the circuit diagram which help me to connect relay with the port p0. and i want to describe that i want to control these relays through serial port . thanks


List of 27 messages in thread
TopicAuthorDate
Relay board diagram            01/01/70 00:00      
   Just search for, "Relay" !!            01/01/70 00:00      
      andy Neil            01/01/70 00:00      
         Relay ratings            01/01/70 00:00      
            ULN2803,ULN2003            01/01/70 00:00      
               more on relay ratings            01/01/70 00:00      
                  Yes of course            01/01/70 00:00      
               internal diodes            01/01/70 00:00      
                  ULN2003's doesn't easily burn            01/01/70 00:00      
                     Uce saturation voltage is rather high            01/01/70 00:00      
                        there is an alternative, search for it            01/01/70 00:00      
                        I agree            01/01/70 00:00      
                           That is bad design            01/01/70 00:00      
                              ULNs resist more...            01/01/70 00:00      
                                 I would never suggest 74HC buffers for d            01/01/70 00:00      
                                    Yes , you didn't            01/01/70 00:00      
                                       I would like to see where that is, pleas            01/01/70 00:00      
                                          correct link            01/01/70 00:00      
                              Bad Design?            01/01/70 00:00      
                                 naah            01/01/70 00:00      
                  Also depends on transistor speed            01/01/70 00:00      
                     valid issue, but not that, now another            01/01/70 00:00      
                        Indeed            01/01/70 00:00      
   Serial            01/01/70 00:00      
   How much current?            01/01/70 00:00      
   allegro            01/01/70 00:00      
      and infineon            01/01/70 00:00      

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