Using a battery charger directly as a power source
Posted: Mar 20th, 2013, 2:25 am
This might be more of a conceptual physics question, but is it possible to use a battery charger directly as the power source if you are controlling a ROV from land? Mainly: is the charger just a simple AC to DC converter? If so, the question I then had is how can the charger define both the voltage and the current without knowing what resistance it is being attached to and still be consistent with Ohm's law? I've heard somewhere that the amperage listed is just the maximum possible current...not sure.
Also, when I was doing testing using a battery charger I wanted to see how the voltage drop was across my tether, so I measured the voltage across the charger and got 12.6V, but when measuring the voltage across the tether I got 14V...is there some reason for this or is my $10 multimeter just giving me bad readings
Also, when I was doing testing using a battery charger I wanted to see how the voltage drop was across my tether, so I measured the voltage across the charger and got 12.6V, but when measuring the voltage across the tether I got 14V...is there some reason for this or is my $10 multimeter just giving me bad readings