power – Connecting Arduino to a Peltier Module

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I am trying to make a cooler using Peltier Modules, the Peltier Modules and the fans switch on when the Temperature sensor attached to the circuit reads above a certain threshold. But I know that Arduino can only handle a couple of MilliAmps as its functionality, in such a case, how can I control my 480W circuitry (12V/40A) using Arduino?

I’m very new to all this and will appreciate a detailed answer.

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