key fob help with a train horn...
this coming up week my train horns should be in.. well I been thinking about trying to do something different with it.. I would like to try to get a key fob and hook it up to the horn... okay yeah sounds easy.. but I want it to set up to where if I hold the button for 5 seconds the horn will be going off for 5 secs... I don't know to set it up just to where i hit the button the horn just goes off real quick and that is it.. does anyone have any ideas on how to do this?? thanks