Controlling a light-emitting diode (LED) with an ESP32 Three is the surprisingly simple task, especially when employing the 1k resistance. The load limits a current flowing through a LED, preventing it from burning out http://theengineerstore.in/products/laser-pointer-pen-5mw-red-color-led-flash-light-stylus-3-in-1
ESP32 Third LED Control with the 1k Load
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