LM317T Voltage Regulator with Pass Transistor

This WSM HOn3 K-28 has a Tsunami and a TCS FL4 decoder. The new circuit uses a LM317 voltage regulator and by programming the Tsunami bell "ring rate" and matching it to the FL4 motor RPM's set on constant dim and dim rate of 10 the syncronization is pretty good. This works with track voltages 12 to 15v and the bell speed will remain constant if the loco visits other layouts.



http://www.youtube.com/watch?v=QCWctZXGsBE&hl=en