For those who regularly make hot drinks four or five times a day, an electric kettle is usually ... best times to use high-energy appliances, such as during off-peak hours, could reduce costs.' ...

Build a light-activated switch using LDR that lets you control home appliances using your mobile phone's torch.

A switch or a fuse in an electrical circuit is always connected to the live wire so that the socket or appliance is not live when switched off. If the switch or fuse is placed in the neutral wire ...