From: nobody@nowhere.com   
      
   On 9/7/2020 9:53 AM, Niresh wrote:   
   > On Friday, September 4, 2020 at 12:34:56 AM UTC+5:30, Pimpom wrote:   
   >> On 9/3/2020 12:04 PM, Niresh wrote:   
   >>> Hi,   
   >>> Could any please suggest how to avoid MCU reset with voltage   
   glitches/noise during relay switches ON. I have protected the relay coil with   
   free wheeling diode and MCU with 2x10uF parallel with 100nF near VDD of MCU   
   and 1uF across RESET pin.   
   >>>   
   >>>   
   >> Is this on a breadboard or on a carefully designed PCB? If it's   
   >> the former, the jumper wires could be picking up stray fields.   
   >   
   > Yes, you are correct. The relay is driven through a NPN transistor with a   
   series resistor. I understand the concept of free wheeling diodes.   
   > It is a well developed PCB board with isolated ground common for relay, MCU   
   and other circuits as well.   
   >   
   > I don't why I could not attach or copy paste the schematic and noise capture   
   in these group.   
   >   
   >   
   This is a text-only group. If you want others to see your images,   
   upload them to an image hosting site and post the link here.   
      
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