Working with RFID is so much fun, you can do alot with these tags like controlling relay, turing lights on off, access control, door lock.

Control aquarium light - sunset, sunrise.

Some pretty cool automated functions and easily adjustable parameters. Not bad for a small budget!

If you ever wanted to build your own smart switch, please read the story below.

Everybody hates it when they want the drink a cup of coffee and the water tank is empty. Here is the solution!