Compact and resource intensive enough? Iron plates at top and bottom. Copper plates in the middle. Tried to make it as modular as possible. https://kirkmcdonald.github.io/calc.html#min=3&belt=express-transport-belt&dm=p3&db=s3&dbc=12&items=electronic-circuit:r:2400&modules=copper-cable:s2;s3:10,electronic-circuit:;s3:10
