An 8 pin relay contains two single pole double throw contacts
Pins 1 and 4 and 8 and 5 are normally closed. On the other hand pins 1 and 3 and 8 and 6 are normally open
The coil of the 8 pin relay is connected across pins 2 and 7
In the following example will be connected pin 1 and 8 to a power source, four light balbs will be connected to another power source with a switch
When closing and open the the SW, contacts change the position
When closing and open the the SW....
Contacts changes the position
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