Circuit breaker!

This is the main breaker for the FRC robot! (Robotics is very useful for physics blogs..)
We use it for the on/off switch on the robot, but it's mainly meant to keep too much current from flowing through the circuit. If there is too much, the breaker heats up and switches the robot off. The little black part clicks out. To turn it back on (hopefully after you removed some of the motors and other things that are causing resistance) you click the black back in. Normally to turn off the robot you push the red button.

Naturally, you want to mount this breaker where it won't be hit by an errant ball, or your robot would randomly go dead, since the circuit would be broken and no current provided to the motors, speed controllers, and other parts.

I'm not sure why the picture has decided to be upside down, but I'm too lazy to fix it. :P The limit on this breaker is 120 amperes, so if it exceeds this limit the breaker will turn off.

On a random note... yay for working on robotics for over 9 hours straight and leaving school at 12:30 am!!!!

Whee...