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

Back to Subject List

Old thread has been locked -- no new posts accepted in this thread
???
08/21/07 19:40
Read: times


 		 #143466 - high voltage measurement
I have to read high dc voltage (above 300V) from a microcontroller. First thing that came into my mind was to have a voltage divider and directly read into a ADC and then to the microcontroller. Obviously, it is unsafe. So, next idea was to have an optocoupler after voltage divider and then to ADC. But I guess that wont work either since I wonder how optocoupler can transmit voltage levels across. So, here I am hoping to get expert advices from you all. Thanks.

List of 34 messages in thread
TopicAuthorDate
high voltage measurement            01/01/70 00:00      
   it all depends            01/01/70 00:00      
   Unsafe?            01/01/70 00:00      
      and unsafe it is            01/01/70 00:00      
         Just how unsafe?            01/01/70 00:00      
            Looks interesting (PC isolation)..            01/01/70 00:00      
   voltage range            01/01/70 00:00      
   Obvious?            01/01/70 00:00      
      Better have an optocoupler burn out than uC            01/01/70 00:00      
         Well, yes, but ...            01/01/70 00:00      
         Why?            01/01/70 00:00      
            why to let things burn out in first place?            01/01/70 00:00      
               You still haven't said...            01/01/70 00:00      
                  I think ...            01/01/70 00:00      
                     Right            01/01/70 00:00      
                        And that should have been obvious?            01/01/70 00:00      
   High-voltage isolation            01/01/70 00:00      
      Sure.....Thanks            01/01/70 00:00      
      Sadly            01/01/70 00:00      
      Avago tech            01/01/70 00:00      
         unsafe and burn            01/01/70 00:00      
   Isolation Techniques            01/01/70 00:00      
      Commercial Product            01/01/70 00:00      
         commercial products like?            01/01/70 00:00      
            It depends where you are            01/01/70 00:00      
               Also current measurement            01/01/70 00:00      
                  More details please            01/01/70 00:00      
                  9916340000            01/01/70 00:00      
                     Thanks            01/01/70 00:00      
      what about            01/01/70 00:00      
   You could use any opto to do this            01/01/70 00:00      
      M Chitrakar: what is the volume what's the range            01/01/70 00:00      
      HCNR201 and IL300F could also be used            01/01/70 00:00      
   This is how I managed high voltage measurements.            01/01/70 00:00      

Back to Subject List