Understanding your relay

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Chapter 2, Section 2
Relays usually have tiny diagrams printed on them that can be difficult to read. The numbers show you where to connect wires on the relay base. This video takes a common relay and explains its connections, including a hypothetical way to connect the relay to illuminate a light when a pushbutton is pressed.
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I should clarify that pin 9 doesn't NORMALLY connect to 5. It is normally open. It WILL connect when the coil is energized.

wdanielmurphy