ELK PRODUCTS 91212 Relay SPDT, 12V, (12 pack)

[Music] alright I'm here today to show you how you could use relays to control a linear actuator a relay is an electromagnetic switch that can be operated by a smaller current to turn on and off a much larger current relays consists of two isolated circuits one control circuit used to control the switch and the other circuit containing the switch as the control circuit is energized current flows through a coil that produces a strong enough magnetic field to close the switch when the coil is de-energized the switch opens again this allows you to control the switch with an electrical input from a sensor or microcontroller rather than a mechanical input from a user relays are defined by how they operate based on the number of poles and throws it has never repulse refers to the number of internal circuits and the number of throws refers to the number of on positions you can get relays that