I have a circuit design question. My controller output gives me a short pulse. I have a speaker that I would like to sound when that happens. Given that I have only one output available to me from the controller and the pulse is the only signal I get, what circuit could I use to work the speaker for a second? I could get a second controller, but that seems an overkill. Does such a circuit have a name? Delay circuit is close, but is not what I need.