[backwoods-engineer]

The voltage cannot be much over about 25 volts. The physical size alone it seems would preclude anything larger.

It's probably 4 or 6.3V. And it doesn't need to be any higher. Processor cores in PC now regularly run at 1.2V and below. The microcontroller I just designed in at work runs at 1.7V, and has its own internal regulator from the 3.3V rails.

The highest voltage in any laptop computer is the 16-20V charger input.

[Red Badger]

You would enjoy this:

http://www.scribd.com/doc/39205165/Robot-AL-76-Goes-Astray