I have a fun one for you. Here is my diagram:
It's a 555 timer in a monostable one shot configuration. What I want to do is find a way to prevent the LED from staying on if the switch is held down. So whether the switch is just pressed or held down, I want the LED to stay lit the same amount of time and then shut off.
I was trying to find an auto shut off switch, but I didn't really have luck with one.