Once again Arduino enthusiast Rui Santos has delivered an interesting easy tutorial that can be quite useful. In this example Rui demonstrates how to control mains outlets remotely - and safely - over the Internet. The key to the safety angle is using inexpensive RF-controlled outlets, so the Arduino only needs to connect with a cheap 433 MHz radio hardware.
The rest of the project is easy, and apart from using an Ethernet-enabled Arduino board - it also takes advantage of the free Home Automation Server service to create a user-interface for the controls. You can learn about the entire project through the following video:
If you're looking to work with your own RF wireless hardware, but don't want to make your own receiver circuit - check out our range of 315/433 MHz receiver shields:
Apart from being idea for working with the various low-cost data links on the market, the shield can also be used to capture wireless weather station data, as described in the book "Practical Arduino". For more information and ideas, check out the product page.