I am sorry to ask this because there are so many of these topics on the board but I can not seem to find a solution. I am fairly new to electronics in this regard, but in school Lab we were hooking up a 9v power supply to the MC7805CT to output 5v for a hex inverter. It was working then but when I came home I bought a 9v regulated power supply with 300mA and it would only output 1v and get pretty hot while doing it. I am not completely sure what the one we were using in Lab was beyond it was 9v as well. In lab the source was outputting around 9v, however mine is more like 10v. Any help would be greatly appreciated.