http://en.wikipedia.org/wiki/Switch#Togg...
Either of these can be performed mechanically like a stereo cabinet door,
or electronically with a Set-Reset Latch Memory cell or Flip-Flop.
http://en.wikipedia.org/wiki/Flip-flop_(...
A flip flop or a T type register.
Flip-flop.
Mono stable circuit makes of two transistors.
Oh I am looking for a circuit which one hit of a button makes a signal go high and the second hit of the button makes it go low. Better explanation is a high signal switches it between high and low states and vice versa. I know this is a relatively common and beginner level logic circuit but for the life of me I cant remember what it is called.