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randall1959

If something consumes 12 Volts at 4 watts

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milliamps? Is there a way to figure it? I'm getting a small monitor that says 12 volts and 4 watts consumption. Thanx for any help in this matter.

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P=IV

P=Power (watts)

I=Current (amps)

V=Volts

So I=P/V

I=4/12=0.333333333333333333333333333333333333333

The current is .333 amps, or 333 ma.

Another useful formula is V=IR

Volts=Current*Resistance

Good info about this is here the12volt.com.

This site refers to voltage as E, and not V. In that case, E is electromotive force, and not voltage. They really are the same thing though.

-Darwin

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Thanx........I'm not much of a mathmetician. So in this case the current draw is 333ma?

Cool, using my battery pack to power both the monitor and the receiver shouldn't be a problem. Thanx a lot!

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Ok let me see if I got the math right.

The watts were actually 4.75

4.75/12= .253 or 253 ma........correct?

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Oh ok......remember I said I'm no mathmetician :blink: Fractions were never my forte'. Thanx. :)

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Now I figured out where I was going wrong.........oops........I was dividing the bottom number by the top number.........my bad.......

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