Is it possible to trigger a 555 timer with an active high signal?

I have a 555 timer and need to activate it with a 30vdc input. Can I trigger the 555 timer when that signal goes from 0vdc to 30vdc? If so, can you please explain how to connect it?

All of the circuits I've seen in the past use an active low trigger, and that is not what I need now.
3 answers 3