I'm a novice with electronics. I have a basic understanding of principles and components, I know how to solder, and can read a schematic but I have to look up some of the symbols. I would like to build my own DC-DC buck converter for a project I'd like to undertake. Vin 12vdc Vout 4vdc (+/-2V), and I would need the device to be able to handle 30amps. The unit would be used to power an electrolyzer. I'm curious what the degree of difficulty would be to source parts and assemble a unit, for a novice like me. Any insight and advice would be appreciated.