Controlling the light-emitting diode (LED) with an ESP32 Third is the surprisingly simple endeavor, especially when using a 1k load. The resistance limits the current flowing through a LED, preventing it from melting http://theengineerstore.in/products/10w-15w-20w-stereo-bluetooth-amplifier-board-12v-24v-digital-power-amplifier-module-xy-p15w