Involvement:Expert (understands the inner workings) - Ownership:1 week to 1 month
Easiest way to get 2 relays under arduino control, can replace other xbee sheields, but even if you dont need that, its still a good buy.
Screw terminals for Vin are a good start.
Jumpers to configure the xbee connection so that you can keep the hardware serial going to the host computer.
While the relays are rated to 250v, there is no way I would do that with the board layout, the ground plane is contiguous around the relay and screw terminal pins so it doesn't have the required clearance to be safe.
Not tried the Nrf or other wireless headers yet
For low voltage switching its a great shield. Mains voltage - no way.
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