Tim's Quiz Master

Identifies first Player Button pressed out of five buttons.
Based on a capacitor and MOSFET configuration.
Depending on LED colour (LED resister used), it holds off other buttons for 30 to 60 seconds. (hold time can be increased by increasing the value of the capacitors)
It has a Reset Button to reset all the Player Buttons.

It needs 5 volt power (no greater).
Socket is for a 5.5mm barrel jack.

Can use something like this:

eBay

or

Need Cables to connect the Buttons to the Master Controller.

(Small screwdriver)

eBay