I have a problem. After connecting the circuit, the relays work only the first time, then after disconnecting and reconnecting the arduino mega to the power supply system, I try to start the relays, but they start only after rebooting the arduin mega reset button, when the arduino is removed from the circuit. Otherwise, the relays do not work, even though all other processes are working perfectly.
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You have not posted a sketch or a schematic of your project. Until you do them providing help is impossible
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It is that wire that is in the wrong place I think! An annotated schematic and links to the hardware items is needed. Also if you are using relays and not relay modules you probably have blown at least one port by this time.
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