Once I lived in an apartment with a safe that had been locked open. It was a giant, heavy thing too large to move. The owners simply renovated the apartment a

Once I lived in an apartment with a safe that had been locked open. It was a giant, heavy thing too large to move. The owners simply renovated the apartment around it. Eventually I got bored and started playing with it. Since it was locked open, it was possible to start taking apart the door from the inside. Once the tumblers were exposed, I figured out the combination. It was tremendous fun! If anyone here is in a similar situation, I recommend cracking the safe. Building the robot seems like a nice bit of mechanical engineering: https://learn.sparkfun.com/tutorials/building-a-safe-cracking-robot/all https://learn.sparkfun.com/tutorials/building-a-safe-crackin...