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Are there any simple methods to drive LEDs?

April 26, 2017drive LEDs methods simple

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Are there any simple methods to drive LEDs?

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A limiting resistor in series with the LED can be used. The resistor prevents the LED from being overdriven and allows the designer better control over the current flowing through the LED. The design steps are as follows: 1. From the Relative Light Intensity (Iv) Vs. Forward Current (If) graph, determine the If at the Iv desired. 2. From the Forward Voltage (Vf) Vs. Forward Current (If) graph, determine the Vf at the If found above. 3. The value of the series limiting resistor is (Vs-Vf)/If where Vs is the supply voltage across both the LED and the series resistor. If there are more than 1 LED connected in series, then the resistor value is [Vs-(Vf1-Vf2-….-Vfn)]/If. Parallel configuration of LEDs are not encourages because of “current-hogging”.