Unlike the monostable circuit in Minecraft redstone, which shortens a pulse, the pulse extender extends a pulse. Because a button gives off only a brief redstone signal, adding a pulse extender causes the redstone signal to last longer. Here’s how to create a pulse extender:
Enlarge 1This contraption lights the redstone lamp longer but with the same button input.
Enlarge 2Place comparators facing each other on the middle blocks.
3When you press the button, the redstone lamp lights up and stays on for a few seconds longer than would normally occur with only a button.