Quote Originally Posted by Dino308gt4 View Post
I found the problem. My 9V battery was low. I swapped it for a fresh one and that fixed it. I can duplicate the problem by swapping in the old one.

Now my next question. What should I use to power my ciruit? I'm using a 7805, and I'm driving a couple of servos, so I kill the 9V batteries quickly.

I looked at a few 9V AC to DC power supplies that I had lying around, but not enough amps I guess. The servos don't move like they should. A fresh 9V drives them at at first but run out quickly.
So many options...
A 9 volt Wall Wart with a 500ma output will do just about everything the 7805 will handle. I keep a few 12 Wall Warts around for a quickie. A capacitor across the rails is sometimes needed as some of the Warts are pretty dirty.

A battery pack with 4 AA rechargeable and no regulator. Non rechargeable have to high voltage to run straight.

If you are going to be doing this often (working on PICs and things) a good bench top power supply is the answer.

Whatever you use, be sure to have a a fuse, smaller the better, as near to the source as possible.