> I'm not an expert but couldn't you just make the tip live and not connect the rest until that's connected? No. You have to deal with disconnects being possib

> I'm not an expert but couldn't you just make the tip live and not connect the rest until that's connected? No. You have to deal with disconnects being possible at both the host side and the device side. Making the tip live means you're touching a live wire to each contact in turn while plugging in the device side.