Another option for the 5V regulator


#1

I just found one of these on my shelf:

http://www.hobbypartz.com/ub2liin.html

$8 for a DC-DC converter, 5.5-26V input, looks like it has a "switch" option(*), and I bet it wouldn't drop out when the input glitches with the motor switching.

(*) I haven't played with it yet, but I'll let you know if I get a chance to...

Lots of other options at http://www.hobbypartz.com/ubec.html but this is the one I bought a couple of for another (as yet unfinished) project...