I'm trying to design a simple circuit for a 4 LED indicator. Its basically like a game show device that has four buttons. The first one to press their button would have their LED light up and "lock" everyone else out; not allowing the other 3 LEDs to light up.
Below is my attempt at making this circuit with a few AND gates and a few NOT gates. But it doesn't work as needed. It only slightly works by blocking the next LED in line but if the one before it is lit then it turns off. Plus the first LED can always be turned on.
Is there a different component I should be using? Or a different configuration of NOT/AND/OR gates?
All help is appreciated!