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M5Stack Mini 3A Relay Unit is used as an electrically operated switch and implements an electromagnet to operate a switch mechanically. This is designed where it is necessary to control a large power load circuit by a separate low-power signal such as digital signal output from a microprocessor.
The M5Stack Mini 3A Relay Unit supports an input voltage of up to 30V DC and 220V AC. With the three named pins of ON, OFF, and COM, users can program to make COM connect to ON or OFF, just by high and low output of a digital GPIO.
