Originally Posted By: mlord
Mmmm... so long as I use a totally independent power supply for the motor side of the house, it works flawlessly now.
...
It's good enough now, but I really don't want another wall wart in that room. Powering the motor side directly from the 5V line of the ATX PSU in the box can still glitch it. So I may try a 12V line instead, and use a 7805 to step that down to 5V on the motor board.


Well, heh.. that was interesting.

I created an onboard 5V PSU with a 7805 connected to the 12V ATX supply from the MythTV box. No difference from just using the 5V directly from the ATX box: still glitchy. Despite placing the recommended ceramics (from the 7805 datasheet) right next to the regulator.

Oh well, yet another wall wart does seem to be in the works now..

Cheers