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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.
23 Ιαν 2024 · Our user-friendly calculator helps you determine the resistance needed to power one or more series-connected LEDs from a specified voltage source at a designated current level. The calculation, rooted in Ohm's Law, also accounts for the voltage drop across the LED.
28 Σεπ 2024 · LED Resistor Formula. R = (V-Vf)/I. Example Calculation. The data sheet for a diode can be used to find its forward voltage and current. From the diode current voltage plot below Vf = 2 V and we use I = 5 mA
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.
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), \(I_L\) is the current through the LED (in amperes, A). Example ...
Calculate resistor values for LEDs using this simple calculator. Enter any three known values and press Calculate to solve for the others.
DigiKey's LED series resistor calculator uses supply voltage, forward voltage, and forward current values to help you identify the correct series resistor.
