===== Driving Relays from GPIO Pins =====

Usually GPIO pins work with 3.3V and low current sink/source capabilities.

To drive a relay the following circuits are recommended:

{{gpio/hardware/transistor-relay.png?linkonly|transistor-relay.png}}

{{gpio/hardware/opto-relay.png?linkonly|opto-relay.png}}

===== See Also =====

  * [[/GPIO|FreeBSD GPIO Framework]]