Using Relay output

How to use the output from relay

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Relay DS

Using Relay output

Relay can control any devices just like a switch contact. Its contact is isolated from driving circuit. Relay contact usually drive high AC voltage like Light and Fans while the contact is at low voltage like 12V DC. Relay provies isolation between low and high voltage as well as allows the low voltage circuit to control any high voltage load. So its very essential when operating loads like lights and fan in a microcontroller system.

For example, When you want to switch on light when relay comes on, then the light has to be powered through C and NO contacts. In this case NC will not be used.

Relay Used on Board

Equivalent of Sealed Isolated Mechanical Relay: GoodSky RWH-SH-112D