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This calculator will help you determine the value of the resistor to add in series with the LEDs to limit the current. Just input the indicated values and press the "Calculate" button. As a bonus, it will also calculate the power consumed by each LED.
DigiKey's LED series resistor calculator uses supply voltage, forward voltage, and forward current values to help you identify the correct series resistor.
Calculator and formulas for calculating the LED series resistor. LEDs are usually operated via a series resistor. The series resistor must be dimensioned in such a way that the supply voltage and the maximum permissible current are not exceeded. You can calculate the size of the resistor on this page. LED resistor calculator.
With this online tool, you can easily calculate the current-limiting resistor for one or more LEDs, both in series and in parallel. Simply input the number of LEDs, the supply voltage, LED forward voltage, and LED current.
The calculation formula for the power series resistor in a single LED circuit is as follows: R = (V supply - V forward) / I rated. Where: Vsupply: The supply battery voltage. Vforward: The forward voltage of the LED. Irated: The rated current of the LED. Who wrote/refined the formula.
3 Οκτ 2024 · Calculation Formula. The LED resistor value is determined using Ohm's law, with the formula: \ [ R = \frac {V_s - V_l} {I_L} \] where: \ (R\) is the resistance (in ohms, Ω), \ (V_s\) is the voltage of the source (in volts, V), \ (V_l\) is the voltage drop across the LED (in volts, V),
Calculate the resistor to use in a circuit with an LED by entering the supply voltage, forward voltage, and forward current below. Optionally calculate the resistor to accommodate multiple LEDs connected in series.
