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LED current limiting resistor selection test

Overview

In engineering applications, LEDs are often used to indicate the operating status of a PCB, such as power-on and communication. However, a troublesome problem is that improper selection of the current-limiting resistor can result in LEDs that are too bright or too dim, severely impacting the visual experience (especially being blindingly bright). The purpose of this board is to visually demonstrate the corresponding LED brightness under different current-limiting resistor sizes, manually adjust it to a satisfactory brightness, and then apply it to my own project.

Design Files

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It is your responsibility to test the circuit yourself and determine its suitability for you. EEWorld will not be liable for direct, indirect, special, incidental, consequential or punitive damages arising from any cause or anything connected to any reference design used.

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Update:2026-03-26 15:58:30

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