A voltmeter isn’t the best gauge of your boat battery’s condition. (Pun intended.) But a voltmeter can provide information useful to savvy boaters. Here’s how to use yours.

A voltmeter and ammeter are to an electrical system what a pressure gauge and a flow gauge are to an oil pressure system: A voltmeter measures electrical pressure in volts; an ammeter measures ...

You mentioned your voltmeter runs at about 15 volts most of the time. My guess is the gauge reads a shade high and is reporting a healthy maximum system voltage of 14.8 volts, which is the norm ...

The voltmeter has a fixed measurement range from 0 to 100 VDC, the only switches on the board are for powering it on and a hold button, which freezes the value currently being shown in the three ...

Reaching for a voltmeter, I quickly discovered that the –12-V output read zero volts. Unsoldering a Zener diode didn’t restore the voltage, but unsoldering a 470-µF, 16-V electrolytic capacitor did.

How to Test a Computer Power Supply Using a Voltmeter. The power supply on a computer transforms the alternating current from the wall outlet into a direct current flow that the computer's ...

Are you certain that your AC voltmeter is safe to measure an incoming 480V power feed? Sure, the manufacturer may rate the meter as good for “600VAC,” but is that sufficient? Let’s look closer at ...

Nano-sized Voltmeter Measures Electric Fields Deep Within Cells Date: December 3, 2007 Source: University of Michigan Summary: A wireless, nanoscale voltmeter is overturning conventional wisdom ...