Hi Philip can you expand a bit on your advice for me pleaseOne way to do this :
Disconnect the smoke unit from the original board.
Use a DPDT relay.
Feed this with your battery supply, and arrange it as a reversing switch.
Wire the normally closed path, into the original board, so that you have forward - running lights.
Use the reverse-light feed from the Revolution to switch the relay. - This swaps the polarity of the power to the original board, so changing the directional lighting.
Hi tony I'm wanting to fit a revolution sound decoder into my k-27 ,greg mentioned you used to make an optoisolatir board the interface between a sierra sound pcb and the motor control voltage in order make the sierra pcb detect change in speed etc ?do you still have the parts to make one please.Hello Phil.
That is exactly how I recommend all USAT locos.
Don't forget the snubbing diode across the relay coil.