Just to inspire you, I share some old projects that never made it to become an ible.
CementTruck2 years ago
What is an "i-button"?
An RFID nub that fits into a receptacle. Very popular for access control.
kenyer (author)  CementTruck2 years ago
It is an electronic key that I use for my garage-door: http://www.instructables.com/id/The-iButton-garage-door-opener-Arduino/
These are awesome. Do you have any more photos of the clock?
kenyer (author)  GorillazMiko2 years ago
No I'm sorry. I made this with a kid, who took it home :)