School me on relays...
So I found a diagram for An application that im doing and it shows me how to wire up a relay. But in the diagram it shows a relay with the following posts numbers.......
Now I have about 3 relays at home but on the back of 2 of them it shows these following posts numbers...
and the last one show the same as above but has no marking of ''87a'' in the middle,just a 87. Mind you the middle post is not used in this app anyway..
With that being would I have to buy new relays that match the post number markings in the diagram?