At the moment I am working on a timed maze/labyrinth. The idea is that when you enter the labyrinth you step on a preassure plate and when you do that the clock starts tickin'. But I am having some trouble with the circuit! The idea is that a clock generator send a signal into a few flip-flops which makes a delay in the signal and force the door to stay open for a specified period of time and then shut again if you can't get through the maze fast enough. But the circuit is reseting itself faster then I want it to! which results in that nothing at all works.
Anyway I'll get back to working on it now.