It would also then be the best source for the relay (5V) power direct without going through the regulator. That minimises potential for spikes and the 470uF 3.3V capacitor should then be Ok.
It would also then be the best source for the relay (5V) power direct without going through the regulator. That minimises potential for spikes and the 470uF 3.3V capacitor should then be Ok.