Designed for my father, this servo mount will allow you to switch a Lego train using an arduino or other hobbyist microcontrollers with a small cheap servo and this
...Plus servo mount.
This design has been based around the "SG90 Micro Servo 9g" which is widely avaliable from a wide range of retailers.
Note that there is a 'left' and 'right' version of the base to be used accordingly with left and right hand switches.
