There are basically two options: - learn how to and design a PCB with relays or FETs or whatever, following all the best practices for it to not catch fire. -

There are basically two options: - learn how to and design a PCB with relays or FETs or whatever, following all the best practices for it to not catch fire. - buy off-the-shelf rail-mounted relays/contactors, then design a driving circuit that will be all low voltage. Assembling it all on a breadboard won't cut it (as in will blow up sooner or later), that's for sure.