Exploring Relay Mechanisms. This presentation delves into the inner workings of relays, their applications, and various types available, including double pole, single pole, phototransistor, solid-state relay, semiconductor, flywheel diodes, suppressor diodes, DPDT, Double Pole, Double Throw Relay, latching relay, NC (normally closed relay), NO (normally open relay), and Electromagnetic and electromechanical relays.