Arduino - Relays (Control AC Appliances)

Arduino is an awesome micro-controller to get started with DIY electronics, but you can not control AC appliances with it directly. Relays help to do this the arduino drives a 5v relay, which in turn controls AC appliances. The only down side to a relay is that the frequency of switching is limited to low value. To over come this we could use triacs which I would demonstrate in a different instructable.In this instructable I’m going to show you how to get started with working with relays using the arduino UNO.”