Buttons are convenient ways to generate temporary redstone signals that automatically turn themselves off after a little while without the player having to do anything to turn them off. But they only last about 1 to 1.5 seconds. What if I need the signal to last a little longer than that (such as 3-5 seconds), but I still need it to turn off on its own? Is there some other source of temporary, self-offing redstone power that can last longer than a button?