Cars, trucks, RVs, and motorhomes run dual 12-volt batteries for various reasons. Depending on how you wire a two-battery 12-volt system, the result can be a 12-volt system or a 24-volt system—or even ...

Have you ever needed to power a 12-volt relay in a circuit but only had 6 or 9 volts available? This simple circuit will solve that problem. It allows 12-volt relays to be operated from 6 or 9 volts, ...

Q.I've got a '55 DeSoto Firedome two-door Sportsman hardtop with 57,000 miles on the odometer. It has the 291ci Hemi and a Powerflite transmission. I've rewired the car and converted it to 12 V so I ...

With fuel economy regulations tightening and connectivity and autonomous-driving capability proliferating, the old-fashioned 12-volt automobile electrical system has reached the end of the road.

The Tesla Cybertruck is equipped with an all-new 48-volt low-voltage system, which replaces the outdated but still the popular, 12-volt system. This move from 12- to 48 volts for auxiliary onboard ...