OHM’s LAW

In it’s simple form……….

Watts = Volts x Amps

(Amps = Watts / Volts)

So if you have two of the numbers (e.g. volts, amps) then you can find out the other (e.g. watts).

For more informaiton on Ohm’s Law – go to http://en.wikipedia.org/wiki/Ohm%27s_law

The following formula applies to any WATTs, AMPs & VOLTAGEs that apply to your situation.

Main voltages for LED application are 12v and 24v. LEDsignSupplies.com currently only handles 12v.

Voltage for global domestic power / sign applications are either 240v or 110v depending on the standard of the particular country.

Substitute whatever applies to your situation based on the relative formula shown below.

The following calculations are based on 240v domestic voltage and 12v LED voltage.

Converting Watts to Amps

The conversion of Watts to Amps is governed by the equation Amps = Watts/Volts

For example 12 watts/12 volts = 1 amp

Converting Amps to Watts

The conversion of Amps to Watts is governed by the equation Watts = Amps x Volts

For example 1 amp x 240volts = 240 watts

Converting Watts to Volts

The conversion of Watts to Volts is governed by the equation Volts = Watts/Amps

For example 100 watts/10 amps = 10 volts

Converting Volts to Watts

The conversion of Volts to Watts is governed by the equation Watts = Amps x Volts

For example 1.5 amps * 12 volts = 18 watts

Converting Volts to Amps at fixed wattage

The conversion of Volts to Amps is governed by the equations Amps = Watts/Volts

For example 120 watts/240volts = 0.5 amps

Converting Amps to Volts at fixed wattage

The conversion of Amps to Volts is governed by the equation Volts = Watts/Amps

For Example, 48 watts / 12 Amps = 4 Volts

Explanation

Amps are how many electrons flow past a certain point per second.

Volts is a measure of how much force that each electron is under. Think of water in a hose. A pint a minute (think amps) just dribbles out if it is under low pressure (think low voltage). But if you restrict the end of the hose, letting the pressure build up, the water can have more power (like watts), even though it is still only one pint a minute. In fact the power can grow enormous as the pressure builds, to the point that a water knife can cut a sheet of glass. In the same manner as the voltage is increased a small amount of current can turn into a lot of watts.

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