Power supply grounding

Discussion in 'General Electronics Chat' started by Honeybee, Nov 6, 2005.

  1. Honeybee

    Thread Starter Member

    Nov 1, 2004
    Can the grounds of two different power supplies each supplying different voltages be connected?

    If not, why?

    And if they can, what about the theory of isolation? For instance in the case where a microprocessor operating at 5V is connected to a device using 240V, the have to be isolated from each other?
  2. n9352527

    AAC Fanatic!

    Oct 14, 2005
    Yes, you can connect _floating_ grounds from different supplies together, which would make them not isolated from each other anymore.