Hi again Steve,

The EMF feedback was removed following a suggestion from Alain in the original thread ( http://www.picbasic.co.uk/forum/show...0&postcount=46 )

Could you elaborate on the scaling thing...

I'll have a play with the speadsheet and add a few resistors in parallel to see what happens. It will probably won't be tonight as I don't have access to the loco anymore (It shot off the end of the test track and now boxed up as it is in need of repair, and my son has gone to bed now so I can't get one of the other locos !)

Sorry guys for going over this again, but I still cant get my head round some of these aspects of programming.