How many volts are needed to power a light- emitting device?

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An energy-efficient light source is a light-emitting diode.They are small and don't get particularly hot.They can be used in beginner electronics projects.They were included in our classroom kits and programs.

People who are new to circuits often ask how many volts are needed to power an LEDs.

Luz Rivas is an MIT electrical engineer and she says that it is between 2 and 3 volts.

Luz said that you need to look at the voltage.Well, guess what?We did that for you.The values are averages and there is slight variation depending on the manufacturer.

The LEDs will not burn out if the Resistors limit the current.The data-sheet above contains the forward current and voltage that can be used to calculate the correct current limiting resistor.