I have a relay module link with a built in opto-isolator circuit.
When there is no load connected to the relays, the relays switch as expected. But when an inductive load (240V 0.5 HP) motor is driven. It causes the Arduino to reset every time the relay is switched.
Please suggest ways to rectify the issue. I have gone through some of the articles and it suggests to have a snubber circuit at the relays. Would a snubber help in this circuit where the optoisolator is already present. If yes, please suggest the connections as well.