Controlling one light-emitting diode (LED) with the ESP32 Three is a surprisingly simple project, especially when employing the 1k resistor. The resistance limits the current flowing through one LED, preventing them http://theengineerstore.in/products/12v-mini-spot-welding-machine-automatic-control-10awg-multiwire-portable-transistor-18650-lithium-battery-spot-welder