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Light-Emitting Diode (LED) » Electronics » Optoelectronics » Light-Emitting Diode (LED) » Let's go... » Experiment 1 - LED

Experiment 1 - The Light-Emitting Diode (LED)Leuchtdiode

Build the circuit shown using a red LED. The resistor R1 prevents an excessive current flowing through the LED.

Circuit LED. (Enlarge)

Circuit diagram of a red LED with a current-limiting resistor.

The LED is now connected in the forward direction and lights up.

In a next step turn the LED around. It is now in the reverse direction and does not light up...

The LED shows the behavior of a normal diode. It only lets current pass in one direction.

In the next experiment you examine the voltage required by the LED to light up...

Circuit diagram of the LED in reverse direction.

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