"DCC ready" board for classical locomotive (DC loco)

original article (romanian language)

     I'm new in model railway system: locomotive, railways, control, etc.

Old locomotives works with DC power, 0..12V for forward and 0..-12V for backward, so classical schematic is

so a "DCC ready" locomotive is a simple DC locomotive with "DCC ready" board, as in schematic:

    This "DCC ready" board looks like 

   This board can be used with 2 miniature 12V bulbs or 2 white leds, as in upper schematic (in some tests, at beginings, I added 1kΩ. resistors when check leds functionality, but I worked with small voltage... after that I disconnect additional resistors and connections remain NC, means not connected/not used).

 Forward led (FW) is on when the voltage on RT terminal is plus (and minus at LT terminal), also motor turns on to forward direction (M1 is plus and M2 is minus), backward/reverse led (RW) is on when the voltage on RT terminal is minus (and plus at LT terminal), also motor turns on to backward direction (M1 is plus and M2 is minus)

   I tested with an Automatic white/red light for analog locomotive (DC) controled by an Arduino automatic model train, so:

- simulated forward movement:

- simulated backward movement

   You can see how system works as in test "DCC ready" board for DC locomotive on automatic railway system video: