How do I build a master control?
I want to build a circuit that has several led groups. Each group has an on/off switch. I want there to be a master control switch that overrides the state of all other switches; i.e. when master control is on, circuit behaves normally, when off, all outputs are 0. How do I build this circuit? Are there any parts that can simplify the process? I thought of using a multiplexer but it only outputs one value and I'm not sure how multiple output multiplexers work. Thanks for the help!