This is a pretty simple question so I am embarrased to ask. I have two triggers that when "off" are at zero volts and when "on" are at 5 volts. They share a common ground. I need to convert it to an ouput that when both are "on" it is 5 volts and when only one is "on" it is 0 volts. It does'nt really matter whether the "on" voltage is 5 volts or higher. I just need to have the voltage when only one is "on" to be near 0 volts. I need this ouput to drive a relay circuit that already has a tansistor driver so I do not need much current. I need this circuit very simple because I don't have much room in the chassis.