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Thread Closed: Drifted off-topic

???
12/13/09 14:53
Modified:
  12/13/09 14:56
Read: times


 		 #171594 - Rise times...
Responding to: ???'s previous message
Also, certain LEDs show considerable rise times:

http://www.vishay.com/docs/80097/physics.pdf

So, if the relay is turned off very fast, the LED couldn't absorb the free-wheeling current fast enough anyway.

But the best argument is given by the datasheet itself: These relays can be ordered with a built-in free wheeling diode, which wouldn't make any sense, if it wasn't needed...

Kai Klaas

EDIT: As the relay current is only 20mA, there's no need for a 1N4001. A fast 1N4148 would be strong enough.

List of 34 messages in thread
TopicAuthorDate
Suppression Diode for relay            01/01/70 00:00      
   non-polarized LED ??            01/01/70 00:00      
      Im surprised.... DIAC            01/01/70 00:00      
         triac + diac => quadrac            01/01/70 00:00      
   built in snubber diode            01/01/70 00:00      
      Powerful enough?            01/01/70 00:00      
         Clamp voltage            01/01/70 00:00      
            Clamp Voltage            01/01/70 00:00      
               Rise times...            01/01/70 00:00      
                  RIse Times...            01/01/70 00:00      
                  TOTALLY irrelevant            01/01/70 00:00      
                     You are just wrong, dear Erik!            01/01/70 00:00      
                        Simulation with TINA            01/01/70 00:00      
                           regardless ...            01/01/70 00:00      
                              So what?            01/01/70 00:00      
               The right description            01/01/70 00:00      
                  Clarity in descriptions            01/01/70 00:00      
                     To be fair            01/01/70 00:00      
                        Yes, to be fair...            01/01/70 00:00      
                           To me, it wasn't            01/01/70 00:00      
                              Very sad indeed            01/01/70 00:00      
                                 You said it yourself            01/01/70 00:00      
                                    And it should have ended there            01/01/70 00:00      
                                    Life is too short            01/01/70 00:00      
                                       Avoid the truth?            01/01/70 00:00      
                                          Avoid the truth?            01/01/70 00:00      
                                             That's exactly what I did!            01/01/70 00:00      
                                                clarification            01/01/70 00:00      
                                                   Still a well proven fact            01/01/70 00:00      
                                                      Not all...            01/01/70 00:00      
                                                         Solution found. Thread can close.            01/01/70 00:00      
                                                         Clarifying things should always be seen as good            01/01/70 00:00      
                                                            Clarifying things should always be seen as good            01/01/70 00:00      
                              "non-polarised" versus "bi-polar"...            01/01/70 00:00      

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