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Mahmood Elnasser
03/08/17 00:30
Read: 155 times
Sacramento
USA


 
#190759 - Experimentation
Responding to: Konstantinos L. Angelis's previous message
Thanks
Adding a zener diode(s) in series with free wheeling diode makes relays de-energization faster on the expense of higher back emf voltage generated on collector of transistor which might increase noise in a shorter time. I even tried a series resistor with free wheeling diode and the higher the resistor the faster the de-energization and the transistor has to be correctly rated or it breaks down.
My main source of noise was the contacts for if no load was connected to them I had no noise issues.
MA.

List of 13 messages in thread
TopicAuthorDate
Relay noise      Mahmood Elnasser      02/09/17 21:27      
   metal box      Stefan KAnev      02/11/17 02:32      
      not possible      Mahmood Elnasser      02/12/17 12:30      
   Are the output leads,inside the relay,...      Kerim Fahme      02/13/17 10:28      
      FG Relays      Mahmood Elnasser      02/16/17 16:31      
   can you ....      Erik Malund      02/14/17 07:03      
      not piggies      Erik Malund      02/14/17 10:55      
         LCD Shield      Mahmood Elnasser      02/16/17 16:42      
            no scientific base      Erik Malund      02/17/17 07:09      
   Avoid Relay noise addin a zener !      KONSTANTINOS L. ANGELIS      03/06/17 14:25      
      Source of noise      Mahmood Elnasser      03/07/17 09:38      
         Relay noise, add a zener with the flywheel diode      KONSTANTINOS L. ANGELIS      03/07/17 12:05      
            Experimentation      Mahmood Elnasser      03/08/17 00:30      

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