Relay is an electromagnetic or electronic switching device activated by a signal and usually used to control a large current or to activate another device or circuit. As seen in the drawing below, when the switch is closed, a 12V signal from the battery flows to the relay which in turn closes the relay switch and turns on the indicator bulb.

 

 

Description and SKU#

Price

Picture

SPDT Relay, 15A 120VAC

EID-R-ELA-Y01

 

 

2.50