I have been playing around with Arduinos for a couple of years now and have big plans for building some type of aquarium controller that is web enabled. These plans usually surface at night over a couple of beers and fade by morning but this little one stuck, probably because it was easy.
*** Disclaimer -- This project deals with electricity and if you are foolish enough to try it you accept all consequences.
I used the following instructables to get the basic idea.
http://www.instructables.com/id/Yet-...er-Controller/
The pictures are actually of my Wavemaker -- Doser combined but for this DIY I will explain just the Wavemaker portion.
List of ingredients:
Arduino - Mine is a duemilanove but anyone will due.
1 Deep receptacle box. Rona or HD
Face Plate
1 Receptacle
1 5v Relay (Lee's Electronics on Main)
Wire - I used cat5
2 Koralia Evolution Power Heads
I ended up taking all the pictures once the project was done as I didn't think to share until I was about finished and thought "I wonder if anyone else would want to do this?"