Arduino hangs when connecting 220v to relay board - Project Guidance - Arduino Forum

Hi. I'm having a problem with a relay that controls a light bulb that is connected to 220v. I have everything connected like this: Relay switches every 2 seconds on/off. It works fine if the light bulb isn't connected to 220v, if I plug the light bulb in, then it works for a couple of seconds ant then the whole thing freezes. As far as I understand the problem is that the on/off switching generates some kind of interfering current? In future I will replace the light bulb with a solenoid va

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