From what I learnt at school today.. Afaik NOT gate acts as an inverter, right? Which means if input is 0, output will be 1 and vice versa. My question is, if input is 0 then output will be 1. From where does the gate gets its current flow? Since input is 0. Or, it cannot be used like that? That is must be connected with AND or OR gate. Please help me clear this confusion. Btw, just registered. Hope to learn a lot from here.