I love model railroading, however buying electronics for it is not a good option, as normally I would have to compromize the functionality,

I therefor started to play around with the Arduino platform, and had quite a few experiments over the years, but finally i have learned how to do it the way i want.

The servo board supports 1-6 servos, which can be controlled individually in all aspects. Should they turn off when not in use, or should they stay on. Should they move slow or fast?, and of course an individual angle of movement for each individual servo.

Sometimes you would need to control a corresponding relay to, i therefor added a simple connector for an relay extension board. At the top i added an i2c interface to allow extensions with pushbuttons, LEDs for feedback or the like.