The simple configuration demonstrates how for build an voltage circuit by an ESP32 S3 microcontroller and a 1k Ω resistance. With connecting dual resistances on series, you can may decrease the electrical amount for a http://theengineerstore.in/products/12v-mini-spot-welding-machine-automatic-control-10awg-multiwire-portable-transistor-18650-lithium-battery-spot-welder