Looks to me like a problem would be the dropout voltage of 2V. I read this to mean the 7805 will stop outputting when the input voltage dips below 7 volts. That discharging RC battery wouldn't last long like that, would it?
Would 7.2V really be a heat issue at that low of a power draw?
Thanks for the suggestions. I have decided to name this bot Box-E
Too many sensors? Didn't know that was possible! $3 on ebay, so why not? Even with 4 ultrasonics, I'm still at less than half the cost of one PING sensor.
The top box is a Stellaris Launchpad box, the bottom box is an MSP430 Launchpad box. The shame is that there isn't a single TI part in the robot, at least as of now. The microcontroller is ATMEL and the motor driver is Toshiba. Sorry TI
The box is not a great look, but I find it to be a great platform while I figure out what I want to do. Kinda like breadboarding the chassis. It's my second bot, so I'm still learning what design consideration to keep in mind.
A lot of those small motors are 3vdc. The motor still spins freely or is it seized up? Without specs on the motor there's no telling. Pictures? Interesting that the motor driver chip got red hot without failing.