Wyatt]’s CPUVolt library provides a fast way to measure voltage using no ... but he provides example Arduino code showing how handy this can be for battery-powered projects.

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 ...

Computer engineer Thiery Guennou based in France has created a new Arduino ... or by a 9V battery with the adapter included in the package. It tolerates voltages between 7.5 and 12 volts.

However, even though you’re literally sitting on a huge battery in your EV, it still requires a small 12-volt battery of the kind you find in your conventional combustion car. To understand why ...

and hybrids that carry big powerful high-voltage batteries also require a 12-volt battery. And certain usage patterns can end up stressing these hard-working little batteries to the point that ...