I'm a begginer with Arduino and I'm trying to use an Arduino Mega with hydroponics. I'm using a 4 relay board with 5VDC relays to activate a pump and a lamp. Everything works fine until I connect things to ac, then the Arduino freezes after a while, so it's not a sketch problem. I used the freeMemor…

Arduino hangs when working with relays and AC

terryking228 May 8, 2018, 4:50pm 2

Hi, This is a common problem,

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