Hi, I am working on making a light that turns on via relay but I want to be able to set the time the time the light goes on via my Iphone. I was wondering if anyone has any idea on how to do that. Thank you so much.
Yes it is relative easy to do. Check the Arduino Cookbook and you will probably find most of what you want and how to do it.
Lots of tutorials on the web show how a phone can send commands via Bluetooth to a Bluetooth equipped Arduino.