I think I have a bad 7805 (TO-220) voltage regulator, but maybe I'm just not using it properly. If I apply 5V to the input, I get a surge of current (warming up my battery and cutting its voltage from the normal 6V to about 1.5). That's with the output unconnected. With no power applied, I find there's a 4K resistance between ground and output (is that normal??)
- posted
16 years ago