Search results

  1. G

    Adding a light in parallel to existing loudspeaker circuit

    I work on a ship which has Public Announcement (PA) system. PA system consists of a couple of zones. Each zone has an a controller, amplifier and a loudspeakers circuit. In our case, PA system is only used to make announcements and play alarm, not music. What I need to do is to add a light...
  2. G

    The simplest definition of VOLTAGE you can come up with

    I've measured it thousands of times, talked about it hundreds of times, but never reaaaaally understood it. All those definitions seemed so complex, as if they are trying to make the voltage seem so mysterious. So, after a little bit of thinking, I think the simplest definition of voltage I...
  3. G

    'Frosting' on top of Ni-Cd batteries

    Just wondering what this "frosting" on the Ni-Cd battery cap could be? How is it created? Is it dangerous? Should it be removed? Check the pic below.
  4. G

    Help with reading UPS drawing

    Hello, everybody, this is my first post. I would like to ask for help with analysing drawing of a certain UPS. This UPS converts 3-phase 440VAC to 48VDC. It would mean a world to me if someone could try to explain what they see in this drawing. I get stuck really quickly. All I see is the...
Top