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Light-Emitting Diode (LED)
f-alpha.net » Electronics » Optoelectronics » Light-Emitting Diode (LED) » Let's go... » Experiment 5 - Series Circuit

Experiment 5 - LEDs in a Series Circuit

In the circuit shown you have three LEDs arranged in a series circuit. This has consequences for the current-limiting resistor, which you need to recalculate ...

Rv = ( U0 - 3 × ULED ) ÷ I

     = ( 9 V - 3 × 2.0 V ) ÷ 0.015 A

     = 200 Ω

The next highest resistor standard value is 220 Ω.

Three LEDs in a series circuit. (Enlarge)

Circuit diagram of three LEDs in a series circuit.

All three LEDs are lit, the power consumed is the same as for a single LED! 

However also a series circuit of LEDs has restrictions...  

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