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Reply to "Lionel RailSounds history"

Mikado posted:

William I,

The way diesel sounds work is as follows; the serial data stream tells the sounds that a speed command has been issued and the sounds rev up. If there is no input on the "chuff in" circuit (this is pulsed AC ground through that cherry switch) the sounds immediately rev down. However, if there is an input to the chuff in circuit the sounds stay revved up. As you increase the throttle again (and pass a certain speed step, which i do remember what they are anymore) another command is sent via serial data to tell the sounds to rev up again. If there is input on the chuff in circuit the sounds stay revved up and so on. Once the input on the chuff in circuit goes away the sounds rev down.

Thanks,

Mike

That explains (and verifies that all is working correctly) on the RS2.5 bd I just repaired. I don't have the LCRU bd up and running yet (still looking for a microcontroller chip), so I can't hear any brake sounds anyway. 

Thanks Mike!

George

OGR Publishing, Inc., 1310 Eastside Centre Ct, Suite 6, Mountain Home, AR 72653
800-980-OGRR (6477)
www.ogaugerr.com

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