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Relay Module Reference

Electrically operated switch

Relay-Module

Pin names

NameDescription
VCCSupply voltage
GNDGround
INControl signal (e.g. from micro-controller)
NCNormally closed
COMCommon pin
NONormally open

Operation

The relay is an electronic switch.

When the IN pin is low / disconnected, COM is connected to NC (NC means normally closed).

When the IN pin is high, COM is connected to NO (NO means normally open).

Simulator Examples