DCC Track Input (12-18V AC/DC)
                          |
                          v
                    +-----+-----+
                    |    TVS    | P6KE24A bidirectional
                    |  Diode    |
                    +-----+-----+
                          |
            +-------------+-------------+
            |                           |
         Track+                      Track-
            |                           |
    +-------+-------+           +-------+-------+
    |      D1       |           |      D3       |
    |    SS54 5A    |           |    SS54 5A    |
    +-------+-------+           +-------+-------+
            |                           |
            +--------->DC+<-------------+
                       |
                       |  +----------------------------+
                       +--| 1000uF/25V Electrolytic   |
                       |  +----------------------------+
                       |
                       +---> TB67H450FNG VM (Motor Power)
                       |
                       |  +----------------------------+
                       +--| AMS1117-3.3 or HT7333 LDO |
                       |  +----------------------------+
                       |           |
                       |           +--| 100uF |---> 3.3V Logic
                       |           |
    +-------+-------+  |           |  +-------+-------+
    |      D2       |  |           |  |      D4       |
    |    SS54 5A    |  |           |  |    SS54 5A    |
    +-------+-------+  |           |  +-------+-------+
            |          |           |          |
            +--------->GND<--------+----------+
                       |
                    Common Ground