This LED calculator will help you design your LED array and choose the best current limiting resistors values. To get starte input the required fields below and hit the "Design Circuit".
Note: When you select a resistor for this purpose, choose a device with a power rating between and times the value calculated below in order to avoid excessive resistor temperatures. This calculator will help you determine the value of the resistor to add in series with the LED 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 the LED.
If you are a beginner in electronics or university student, you can use it to learn about light-emitting diodes. If you already know how to design LED arrays, you can use it to check your. For the protection or limiting the current we simply use a resistor in series with it. The online calculator below allows for the automatic calculation of the necessary current limiting resistor to maximize the useful life of an LED.