The water gun - the cheap, squirt-squirt variety - has become the weapon of choice and symbol of Spain's anti-tourism ...

For the first time in history, AC can be generated directly using DC batteries instead of burning oil, gas or coal from the power plants or diesel generators.” - Dr. Ermanno PinottiGILROY ...

why do carmakers no longer use generators, which produce rich, creamery DC electricity? Why would it make any sense to generate AC, and then have to convert it to DC? As you probably guessed ...

Jeff suggests that you could replace the function generator with just a manual AC source by switching the leads on a battery back and forth. Some people call these AC to DC converters "wall warts ...