Hi Guys
I've done some more research into negative voltage particularly from PSU, following up on JimB's suggestion yesterday. Firstly, I understand that connecting a 12vdc to 0vdc of separate outlets would give +12vdc and -12vdc, presumably the joined 'pair' would become 0vdc ? Going from pictures alone, is this often done with a small metal plate attached to the banana terminals on the outside of the enclosure ?
I still have concern about using voltage regulators along with the 2 variable power supplies because of heat. Are buck converters better or unnecessary in this instance ? I'm planning to use an ABS enclosure with a thin aluminium sheet in the base for rigidity, vent slats in the front and a 60cm fan in the back to keep it cool, but I've already experienced the vulnerability of ABS to heat !