Mains Switch Relay 2: Ready-Built PCB Assembly for Raspberry Pi, Beaglebone, Arduino & PIC

Disappointed when it arrived and I realised it was only a single relay board as I ordered it thinking it was actually a dual relay board. Obviously entirely my own fault and have tried not to let this influence my rating. The board looks well designed and manufactured with nice wide tracks for the line voltages. The earth terminals don't appear to be linked so it is critical to ensure that continuity is maintained otherwise there is the potential for the end equipment to be unearthed with potentially fatal consequences.(I will amend this review if anyone can confirm earth continuity.)

Mains input goes to one terminal and connect your mains operated device to the other. Although there are 3 connections on both mains connectors, the earth (centre pin) is not used by this board. Experimented with a desk fan controlled by both Arduino and RPI. Somewhat pricey compared to some of the multi relay boards which mostly don't have a separate mains in/out - this feels safer and easier to use.