I've got a question for anyone who can answer, I accidently left my battery connected to my USB NerKit circuit while doing the first project in the manual, Did that hurt anything?? I tried it with another battery (after the one before it died) but nothing happened- on the LCD screen or anything.

Thanks for your help

Nathan

P.S This is my first time to post anything on here so I wouldn't mind advice on that too!!!

Nathan -

Generally leaving the battery on (and letting it drain down) will not harm the MCU. You may have damaged the voltage regulator but even that is doubtful. When you changed batteries you may have knocked a wire loose somewhere. If you have a multimeter, you should check voltages around the breadboard to see if everything is OK.

Thanks for your input,

At first I didn't have an extra battery handy, and the one I tried wasn't putting out 9v, I think that gave me the problem I had. I ended up connecting several 1.5v batteries together to get my 9v-- which worked.