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How do we have to connect the relay??which pin should be given to led and which pin to the collector of the transistor in those 3pins??wat abt com??reply soon please..
normally PCB mount relay (suger cube type) are called 1 change over or 2 change over type relays
they have 5 or 8 connections – terminals
in 1 C/O type relay there are 5 terminals. 2 for coils and 3 for C, NC and NO
from these one of the coil terminal is connected to +Ve supply, second is connected with collector of transistor
C, NC and NO are for connecting device or load
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