DC and DCC on the same layout.

Uncle peanut butter Feb 23, 2023

  1. Uncle peanut butter

    Uncle peanut butter TrainBoard Member

    I’m thinking of making my layout capable of running either dc or dcc. Not simultaneously. I have some locos that I want to keep my tinkering hands off of and really only run them to see them run.
    At the power coming out of my arduino can I install a diode on each leg of the main feed to protect the DCC ex from power back feeding?
    If not I’ll put plugs in place to easily swap between the two. TIA
  2. Ash

    Ash TrainBoard Member

    The next version of DCC-EX will provide DC capability. And Engine Driver can be used to switch from DCC to DC, and drive the DC track.

    Join the discussion on the DCC-EX discord server. Install the development branch and participate in beta testing.
  3. Sumner

    Sumner TrainBoard Member


    On my test track I use a DPDT toggle switch to switch it back and forth. Same with a siding that I can program on, flip the switch and run out onto the main.


    I have plugs for the DC throttle and the two DCC inputs (main and program track).

    308GTSi likes this.
  4. Atani

    Atani TrainBoard Member

    If you are after a commercial solution you could look at MRC Tech6 which has a slide switch to go between DC and DCC output (default address 3 for DCC, the handheld throttle supports other addresses)
  5. CSX Robert

    CSX Robert TrainBoard Member

    No, that would not work. It would only block the DC in one direction, so you could only run your DC engines in one direction without the possibility of back feeding DC into your DCC-EX. Even worse, since DCC is an alternating current, you'd be blocking the DCC half the time and wouldn't be able to run your DCC engines at all. You just need a DPDT switch to swap between DC and DCC.
    BigJake likes this.

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