I used to have an old Lego train (typenumber 7730) which ran on 12V. As a young boy I managed to destroy the train's motor.
I'm trying to buy a used replacement, but I'm also thinking of buying a new 9V motor and modifying the Lego transformer module (I know a bit about electronics, can handle a soldering iron).
- is, except for the 9 or 12 volt part, the 9V-motor compatible with the 12V-motor? Track width, power/ground via a middle rail?
- Anyone ever modified a 12-volt Lego transformer to control a 9V motor?