Adafruit Latching Mini Relay FeatherWingThe Latching Mini Relay FeatherWing is a powerful tool for controlling small appliances, allowing you to easily switch on and off devices such as lamps, fans, and solenoids that run on up to 250VAC or DC power using any Feather board. This FeatherWing provides a reliable and efficient way to add relay control to your Feather projects. Latching Relay Design: Unlike the Non Latching relay, the Latching Mini Relay uses two control pins: SET and UNSET.