Project Frying Nanos! Assistance Greatly Appreciated.

Using Arduino Project Guidance
9

UPDATE:

  1. I can confirm 4.75v on the 5v supply when powered via USB and 5.1v when powered with a 9v battery.

  2. The relay is part of a relay module which contains an opto-coupler.
    This is the unit I am using: Amazon.ca

I only have a meter and don't own a scope. Do I need to worry about flyback? Doesn't the relay module I am using contain the relevant circuit protection?

  1. I tested the relay and the total project current draw. The project's total amp draw is 95mA. The relay draws 59mA of that. The relay is powered by the 5v supply as shown in the diagram. The remainder of the project draws 36mA.

Am I doing something wrong here?

Thank you again for your assistance.