Dear forumers, I am a "neophyte" in hardware. It mans that my question could be stupid :cold_sweat: I want to connect 48 relays ( 6 eight channel relay modules) on my MEGA. Each relay via its optocoupler needs 30mA. Thus the controller has to deliver 48 x 0.030A = 1.44A. Wat's the solution? …

MEGA 2560 with 48 relays

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