Click-clack! If you want to control devices or appliances with your Feather, you can do so with a Relay FeatherWing. These Wings have a single relay on them. We have a few different types, but all have similar functionality.
The relay is controlled by one or two pins. You'll need to solder a jumper wire or close a solder jumper to select the pin. Since they're simple, you can use them with any Feather and along-side any Wing, as long as the pins you select for relay-control are not already use.
You can also have multiple relays if you like, just make sure the pins selected are unique.
This is the simplest relay. Drive the pin high to set the relay, and drive the pin low to unset it.
You can switch up to 2A of resistive current at 30VDC or ~40VAC or lower. At 110VDC you can switch up to 0.3A, at 120VAC up to 0.5A, and at 250VAC you can switch up to 0.6A. Check the datasheet for the relay for the exact switching capacity, and of course, for reactive/inductive loads you will need to de-rate. This isn't a relay you can use to turn on and off your washer/dryer, stick to 60W or less.
50mA current is drawn when the relay is set. If power is lost, the relay will go back to being unset
This is the Latching version of the above relay. This one requires two pins, a SET and UNSET and instead of keeping the SET pin high, you only have to pulse each pin high for 10ms to latch the relay open or closed. You need two pins but save power. Note, if power is lost, the relay will stay in the last setting.
Both FeatherWings use the same family of relay. You can switch up to 2A of resistive current at 30VDC or ~40VAC or lower. At 110VDC you can switch up to 0.3A, at 120VAC up to 0.5A, and at 250VAC you can switch up to 0.6A.
This Wing has a non-latching type relay. Compared to our smaller mini relay FeatherWings, this one can handle a beefy 1200 Watts!
You can switch up to 10A of resistive-load current at 120VAC, 5A at 240VAC. With inductive loads, about half that. Check the datasheet for the relay for the exact switching capacity, as it depends on type of load and voltage type and magnitude. This relay is good for handling fairly large devices, computers, TVs, small appliances and more.
