Led Resistor Calculator

How to Use the LED Resistor Calculator

This LED Resistor Calculator is designed to help you determine the necessary resistor for your LED setup, as well as calculate key parameters such as power dissipation and total power consumption. Follow these step-by-step instructions to use the calculator effectively.

Step 1: Input LED Specifications

• LED Forward Voltage (V): Enter the forward voltage of your LED. The input must be a number between 0.1V and 10V and can be set with increments of 0.1V.
• LED Current (mA): Provide the current rating for the LED. This value should be between 1mA and 1000mA, adjusted in steps of 1mA.

Step 2: Enter Supply Voltage

• Supply Voltage (V): Enter the voltage from your power supply. This should range from 1V to 50V and can be adjusted in increments of 0.1V.

Step 3: Select Number of LEDs

• Number of LEDs in Series: Choose how many LEDs you are connecting in series from the options: 1 LED, 2 LEDs, 3 LEDs, 4 LEDs, or 5 LEDs.

Step 4: View the Calculated Results

• Required Resistor Value: The calculator will compute the necessary resistor value needed for your circuit. The result is displayed in ohms (Ω) with one decimal precision.
• Resistor Power Dissipation: Check the power dissipation across the resistor, displayed in watts (W) with two decimal precision. Ensure the resistor can handle this power load.
• Total Circuit Current: The total current flowing through the circuit, shown in milliamps (mA).
• Total Circuit Power: The total power consumed by the circuit, calculated in watts (W) with two decimal precision.

By carefully providing these inputs and reviewing the calculated outputs, you can effectively use this tool to set up your LED circuit safely and efficiently.